JP2019048311A - Injection device for die-cast molding, and die-cast molding method - Google Patents

Abstract

To provide an injection device for die-cast molding capable of stabilizing the shape of a semi-solidified metal installed in an injection sleeve by an extrusion mechanism.SOLUTION: Provided is an injection device 100a for die-cast molding comprising: an injection sleeve 4 in which a cylindrical container C storing therein a semi-solidified metal M can be arranged in a state where it is held by a robot T for carrying; a plunger 2 for injecting the semi-solidified metal M arranged at the inside of the injection sleeve 4 into a mold 1; and an air cylinder 5 built in the plunger 2 so as to be arranged along the central axis α of the injection sleeve 4 and extruding the semi-solidified metal M in the container C arranged at the injection sleeve 4 into the injection sleeve 4.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an injection device for die casting and a method of die casting, and more particularly to an injection device for die casting and a method of die casting for injecting a semi-solid metal to form a molded product.

  DESCRIPTION OF RELATED ART Conventionally, the shaping | molding apparatus which injects a semi-solid metal (semi-solid metal) and shape | molds a molded article is known (for example, refer patent document 1).

  Patent Document 1 discloses a molding apparatus including an injection sleeve for installing a semi-molten metal, a plunger, and a carrier that accommodates the semi-solid metal and is held by an articulated robot and transported to the injection sleeve. ing. The carrier is a container in which the semi-solid metal is contained. Moreover, the carrier has a cylinder (pressing mechanism) for pushing out the semi-solid metal from the inside of the carrier. The conveyer in which the semi-solid metal is accommodated is moved and arranged by the articulated robot to a predetermined position of the injection sleeve. The cylinder then places the semi-solid metal in the injection sleeve by extruding the semi-solid metal in the carrier held by the articulated robot. The plunger then injects the semi-solid metal set in the injection sleeve into the mold.

Japanese Patent Application Laid-Open No. 10-305363

  Here, in general, it is preferable that the semi-solid metal (semi-solid metal) is installed in the injection sleeve because the entrainment of air in the semi-solid metal installed in the injection sleeve is preferably small. It is preferable to carry out without breaking the shape of However, in the molding apparatus disclosed in the above-mentioned Patent Document 1, the carrier having the cylinder (extrusion mechanism) is moved together with the semi-solid metal by the articulated robot every injection molding and arranged at a predetermined position of the injection sleeve. Therefore, there is a disadvantage that the position of the cylinder with respect to the injection sleeve varies from one injection molding to another. For this reason, there is a problem that the shape of the semi-solid metal installed in the injection sleeve by the cylinder is not stable. Therefore, depending on the position of the cylinder with respect to the injection sleeve, the shape of the semi-solid metal may be broken.

  The present invention has been made to solve the problems as described above, and one object of the present invention is to provide a die-cast capable of stabilizing the shape of semi-solid metal placed in an injection sleeve by an extrusion mechanism. It is an object of the present invention to provide a molding injection device and a die casting method.

  In order to achieve the above object, an injection device for die casting according to the first invention comprises: an injection sleeve capable of being disposed in a state where a cylindrical container containing semisolid metal is held by a transfer device; A plunger for injecting semi-solidified metal disposed in the mold into the mold, and the semi-solidified metal in a container disposed in the plunger and disposed in the injection sleeve so as to be disposed along the central axis of the injection sleeve; And an extrusion mechanism for extruding into an injection sleeve.

  This die-casting injection device is, as described above, an extrusion that is incorporated in the plunger so as to be disposed along the central axis of the injection sleeve, and extrudes the semisolid metal in the container disposed in the injection sleeve into the injection sleeve. Provide a mechanism. As a result, since the extrusion mechanism can be fixedly arranged at a predetermined position with respect to the injection sleeve, the position of the extrusion mechanism is prevented from being moved and dispersed every injection molding relative to the injection sleeve as in the prior art. be able to. As a result, the extrusion mechanism can stabilize the shape of the semi-solidified metal placed in the injection sleeve. In addition, since the pushing mechanism is built in the plunger, the combined size of the pushing mechanism and the plunger can be reduced in the central axial direction of the plunger.

  In the above die-casting injection device, preferably, the central axis of the injection sleeve and the central axis of the extrusion mechanism substantially coincide with each other. According to this structure, since the semisolid metal can be extruded along the central axis of the injection sleeve by the extrusion mechanism along the central axis of the injection sleeve, the central axis of the extrusion mechanism is eccentric to the central axis of the injection sleeve As compared with the case, when installing the semi-solid metal in the injection sleeve, it is possible to suppress the shape of the semi-solid metal from being broken.

  In the die-casting injection apparatus described above, preferably, the extrusion mechanism is disposed in the injection sleeve so as to be movable back and forth, and an extrusion part for extruding semi-solidified metal in a container disposed on the injection sleeve, and a body for driving the extrusion part The plunger has an inner space portion containing the main body portion, and an end surface on the ejection side communicated with the inner space portion, and has a through hole through which the extrusion portion passes. According to this structure, the internal space can secure a space for arranging the main body in the plunger, and the main body incorporated in the plunger can drive the pushing portion through the through hole. it can.

  In this case, preferably, the plunger has a plunger tip provided with a through hole and a plunger rod provided with an internal space. According to this structure, the internal space can be disposed at a position different from the position of the plunger tip in direct contact with the high temperature semi-solid metal. For this reason, it can suppress that the main-body part incorporated in the interior space part is expose | bleached to high temperature.

  In the above-described configuration in which the plunger includes the plunger tip and the plunger rod, preferably, the central axis of the extrusion portion substantially coincides with the central axis of the plunger tip. According to this structure, the semi-solid metal extruded by the extruding unit and installed in the injection sleeve can be injected into the mold by the plunger tip whose central axis substantially coincides with the extruding unit. The semi-solid metal can then be injected into the mold.

  In the above-described configuration in which the inner space portion and the through hole are provided in the plunger, preferably, the pushing portion is provided at the other end of the pushing rod through the through hole and one end thereof is connected to the main body portion. And an extrusion tip for closing the through hole from the tip side of the plunger. According to this structure, since the through hole can be closed by the extrusion tip, it is possible to prevent the semi-solid metal from intruding into the plunger from the through hole. In addition, the push rod can easily connect the main body incorporated in the plunger rod and the push tip.

  In the above die-casting injection device, preferably, the injection sleeve has an opening for arranging the container and the transfer device on the central axis of the injection sleeve in the injection sleeve while the container is held by the transfer device. It is provided. According to this structure, the container and the transfer device can be easily introduced into the injection sleeve through the opening.

  In this case, preferably, the opening is a half or more of the circumferential direction of the injection sleeve within a predetermined range in the central axial direction of the injection sleeve in which the gripping portion provided at the tip of the robot arm constituting the transfer device is disposed. It has a first opening which cuts out the range. According to this structure, the first opening can secure a large introduction port in the injection sleeve for easily introducing the container and the grip into the injection sleeve.

  In the configuration in which the opening includes the first opening, preferably, the opening has one end connected to the first opening, and the circumferential direction of the injection sleeve within a predetermined range of the central axial direction of the injection sleeve in which the container is disposed. Have a second opening cut out in the range of less than half of. According to this structure, by ensuring that the range in which the injection sleeve is not cut is less than half of the circumferential direction, the contact between the injection sleeve and the plunger is secured in the range greater than half of the circumferential direction of the injection sleeve. Can. As a result, when the plunger moves back and forth in the injection sleeve in the range in which the second opening is provided, the plunger can be stably moved along the inner circumferential surface of the injection sleeve.

  In the configuration in which the opening includes the second opening, preferably, one opening on the small diameter side of the tapered container is disposed inside the second opening, and the container is provided inside the first opening. The other opening on the large diameter side of the is disposed. According to this structure, the other opening on the large diameter side of the container can be disposed on the side of the first opening where the notch range in the circumferential direction is large. Therefore, the space in the injection sleeve can be efficiently utilized. Container can be arranged.

  In the above die-casting injection device, preferably, the extrusion mechanism has an air cylinder. According to this structure, the air cylinder can exhibit stable performance in a high temperature environment as compared with the electric or hydraulic extrusion mechanism.

  In the die casting method according to the second aspect of the invention, the semisolid metal contained in close contact with the container is pressed from one opening of the container toward the other opening, thereby peeling the semisolid metal from the container. And disposing the container for containing the peeled semi-solid metal by the transport device and arranging the container on the central axis of the injection sleeve, and arranging the container on the injection sleeve using the extrusion mechanism incorporated in the plunger The method comprises the steps of: extruding the semi-solidified metal in the container into the injection sleeve; and injecting the semi-solidified metal extruded into the injection sleeve into the mold using the plunger.

  In this die casting method, as described above, the semisolid metal is disposed on the central axis of the injection sleeve, and the extrusion mechanism incorporated in the plunger is used to inject the semisolid metal in the container disposed in the injection sleeve. Push it into the sleeve. As a result, since the extrusion mechanism can be fixedly arranged at a predetermined position with respect to the injection sleeve, the position of the extrusion mechanism is prevented from being moved and dispersed every injection molding relative to the injection sleeve as in the prior art. be able to. As a result, it is possible to obtain a die-casting method capable of stabilizing the shape of the semi-solid metal set in the injection sleeve by the extrusion mechanism. Further, since the extrusion mechanism is built in the plunger, it is possible to obtain a die-casting method capable of reducing the combined size of the extrusion mechanism and the plunger in the central axial direction of the plunger.

  According to the present invention, as described above, the extruding mechanism can stabilize the shape of the semi-solid metal set in the injection sleeve.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic diagram which showed the whole structure of the die-cast molding machine provided with the injection device for die-cast molding by one Embodiment. It is a figure for demonstrating the container in which a semi-solid metal is accommodated. FIG. 1 is a schematic cross-sectional view showing an injection sleeve and a plunger of a die casting injection device according to one embodiment. FIG. 5 is a cross-sectional view taken along line 500-500 of FIG. 3; FIG. 5 is a cross-sectional view taken along line 510-510 of FIG. 3; FIG. 5 is a cross-sectional view taken along line 520-520 in FIG. FIG. 5 is a cross-sectional view taken along line 530-530 in FIG. FIG. 5 is a cross-sectional view taken along line 540-540 of FIG. 3; It is a figure for demonstrating the 1st process of the die-cast-forming method by one Embodiment. It is a figure for demonstrating the 2nd process of the die-cast-forming method by one Embodiment. It is a figure for demonstrating the 3rd process of the die-cast-forming method by one Embodiment. It is a figure for demonstrating the 4th process of the die-cast-forming method by one Embodiment. It is a figure for demonstrating the 5th process of the die-casting method by one Embodiment. It is a figure for demonstrating the 6th process of the die-casting method by one Embodiment.

  Hereinafter, an embodiment of the present invention will be described based on the drawings.

[Embodiment]
The configuration of a die-casting injection device 100 a according to an embodiment will be described with reference to FIGS. 1 to 8. The die casting apparatus 100 a is an arrangement of the die casting machine 100. In each of the drawings, the moving direction of the plunger 2 described later is taken as the X direction. Further, in the horizontal plane, a direction orthogonal to the X direction is taken as a Y direction, and a direction orthogonal to the X direction and the Y direction is taken as a Z direction (vertical direction).

(Configuration of die casting machine)
As shown in FIG. 1, a die 1 is attached to the die casting machine 100. The die casting machine 100 is a device for injecting the semi-solidified metal M into the mold 1 in a clamped state by the die casting machine 100a to form a molded article M0 (see FIG. 14). The die casting machine 100 includes a fixed die plate 101, a movable die plate 102, a movable die plate drive mechanism 103, and an injection device 100a for die casting.

  The mold 1 includes a fixed mold 1a and a movable mold 1b. The fixed mold 1a is attached and fixed to the fixed die plate 101 of the die casting machine 100. The movable die 1 b is attached and fixed to a movable die plate 102 provided on the X1 direction side of the fixed die plate 101. The fixed die plate 101 is fixed, and the movable die plate 102 is configured to be movable in the X2 direction or the X1 direction by the movable die plate drive mechanism 103. The movable mold 1 b is configured to move closer to or away from the fixed mold 1 a as the movable die plate 102 moves.

  By moving the movable mold 1b closer to the fixed mold 1a by the movable die plate drive mechanism 103 and clamping the mold, a cavity (cavity portion) 1c for molding a die-cast product (molded article) in the mold 1 Is formed. The fixed mold 1a is provided with a runner 1d which communicates with the cavity 1c and serves as a circulation passage of the semi-solidified metal M. The runner 1d extends in the X direction from a mating surface (division surface) 1e of the fixed mold 1a with the movable mold 1b and penetrates the fixed mold 1a. Further, the runner 1d has a circular vertical cross section taken along a plane perpendicular to the X direction. The semi-solidified metal M is a metal in a phase state in which a solid phase and a liquid phase are mixed.

(Schematic configuration of injection apparatus for die casting)
The die-casting injection device 100a shown in FIG. 1 is a device fixed to the die-casting machine 100 and used to inject the semi-solidified metal M into the mold 1 in a clamped state. The die-casting injection device 100 a includes a plunger 2, a drive unit 3, an injection sleeve 4 and an air cylinder 5. The air cylinder 5 is an example of the “pushing mechanism” in the claims.

  The injection sleeve 4 is a cylindrical metal part that communicates with the cavity 1 c formed in the mold 1 via the runner 1 d. The plunger 2 is configured to move forward and backward in the X direction in the injection sleeve 4 by the drive unit 3. The air cylinder 5 is a mechanism for extruding the semi-solid metal M from the container C containing the semi-solid metal M disposed in the injection sleeve 4 and installing the semi-solid metal M in the injection sleeve 4 .

  Here, with reference to FIG. 1, the steps of the die casting method by the die casting injection device 100a will be briefly described. First, the container C in which the semi-solidified metal M is stored is placed (placed) on the ejection sleeve 4 by the transfer robot T (see FIG. 2) in a state where the container C is held by the transfer robot T. Next, the semi-solidified metal M is pushed out of the container C by the air cylinder 5 and the semi-solidified metal M is set in the injection sleeve 4. Next, the transfer robot T gripping the empty container C retracts. Finally, as the plunger 2 advances (moves in the X2 direction) toward the fixed mold 1a (runner 1d), the semisolid metal M is ejected into the cavity 1c. The details of the process of the die casting method will be described later. The transfer robot T is an example of the “transfer device” in the claims.

  As shown in FIG. 2, the container C has a cylindrical shape whose both ends are open, and has a tapered shape (reverse tapered shape) whose inner diameter and outer shape expand from one opening C1 to the other opening C2. That is, the inner diameter d1 of the one opening C1 is smaller than the inner diameter d2 of the other opening C2 (d2> d1). Moreover, the non-taper-shaped part C3 in which the magnitude | size of an outer diameter does not change in the predetermined range of the direction in which the one opening C1 and the other opening C2 are located in a line is provided There is. The non-tapered portion C3 is a portion gripped by the transfer robot T.

  The transfer robot T includes a grip portion T1 for gripping the container C, and a robot arm portion T2 provided with a grip portion T1 at its tip. The transport robot T is configured to arrange (install) the container C gripped by the grip portion T1 in the injection sleeve 4 (see FIG. 3) by the robot arm portion T2. Further, the transport robot T is configured to retract the empty container C from the inside of the injection sleeve 4.

  Here, with reference to FIG. 2, production of the semi-solidified metal M accommodated in the container C (preparation before die casting) will be briefly described. First, an empty container C is installed on the cooling installation stand S such that the one opening C1 of the container C contacts the cooling installation stand S. The cooling installation stand S internally has a refrigerant passage S1 through which a refrigerant such as water is circulated. Next, semi-solidified metal M manufactured in advance is poured into an empty container C by a ladle (not shown) or the like. Next, a part of the semi-solidified metal M accommodated in the vicinity of the cooling installation stand S of the container C is solidified by the cooling installation stand S to form a solid bottom portion (solidification metal) M1. At this time, the inside of the container C may be stirred using a magnetic stirring device (not shown) or the like so that the semi-solidified metal M other than the bottom portion M1 does not solidify. In the description of the present embodiment, for the sake of convenience, the semi-solidified metal M is a combination of the semi-solid metal portion M2 housed in the container C and the bottom portion M1 which is a solid metal portion housed in the container C. It is written.

  Hereinafter, each part (plunger 2, drive unit 3, injection sleeve 4, air cylinder 5) which comprises the injection device 100a for die-cast molding is demonstrated in detail.

(Configuration of plunger and drive unit)
As shown in FIG. 1, the plunger 2 is a member which is inserted into the injection sleeve 4 and pushes (injects) the semi-solidified metal M placed in the injection sleeve 4 into the mold 1. The plunger 2 includes a plunger tip 21 detachably fixed to the X1 direction end, and a plunger rod 22 connected to the plunger tip 21 at the X1 direction end and connected to the drive unit 3 at the X2 direction end. It is. Each part of the plunger 2 is mainly formed of a metal material such as steel. The plunger 2 has a straight rod shape as a whole.

  The drive unit 3 is connected to the plunger rod 22 and is configured to move the plunger 2 into and out of the injection sleeve 4. Drive unit 3 is, for example, a hydraulic cylinder driven by hydraulic circuit 3a.

  The plunger 2 is moved by the drive unit 3 in the horizontal direction (X direction) between a predetermined advancing position PF1 and a retracted position PB. As shown in FIG. 3, at the retracted position PB, the plunger tip 21 is positioned in the X2 direction with respect to the second sleeve member 42 of the injection sleeve 4 described later, and the container C in which the semisolid metal M is accommodated by the transport robot T. Are disposed on the injection sleeve 4. Then, after the semi-solidified metal M is installed in the injection sleeve 4 by the air cylinder 5 and the container C and the transport robot T are retracted from the injection sleeve 4, the plunger 2 advances in the X1 direction. The extruded semi-solidified metal M is supplied to the cavity 1 c (see FIG. 1) via the runner 1 d. The advancing position PF1 is a position at which the injection of the semi-solidified metal M into the cavity 1c is completed. Thereby, the plunger 2 is configured to push the semi-solidified metal M in the injection sleeve 4 by the plunger tip 21 and inject it into the cavity 1 c of the mold 1.

  The plunger tip 21 of the plunger 2 is a member having a thick-walled structure and a cylindrical shape, and is disposed in an injection sleeve 4 (see FIG. 1) for introducing the semi-solidified metal M into the mold 1. The plunger tip 21 is provided so as to fit and slide on the inner peripheral surface of the injection sleeve 4. Further, it is preferable that the plunger tip 21 be coated with a coating such as a cermet on the surface of the steel material, for example, for wear resistance and heat resistance.

  The plunger rod 22 is a cylindrical member made of steel or the like, and is advanced and retracted into the injection sleeve 4 by the drive unit 3 (see FIG. 1).

  As shown in FIG. 3, the plunger tip 21 is provided with a through hole 21a penetrating in the X direction at the center. The through hole 21 a is configured to allow the push rod 51 b of the air cylinder 5 described later to pass therethrough. The plunger rod 22 is internally provided with an internal space 22a for housing the air cylinder 5 (a main body 52 described later of the air cylinder 5). The through hole 21a communicates the internal space 22a with the end face 2a of the injection side (the side where the container C is disposed) (the side in the X1 direction) of the plunger 2.

(Configuration of injection sleeve)
As shown in FIG. 3, the injection sleeve 4 is abutted against the face 1f opposite to the mating face 1e of the fixed mold 1a from the X1 direction side and is installed in the die casting machine main body in a state of communicating with the runner 1d. ing. The injection sleeve 4 is open at the X2 direction end. The injection sleeve 4 is disposed along the horizontal direction (X direction). Further, a central axis line α extending in the X direction of the injection sleeve 4 and a central axis line of the runner 1 d coincide with each other. Further, the inner diameter D1 of the injection sleeve 4 is equal to the inner diameter of the runner 1d.

  The injection sleeve 4 is a guide member of the plunger 2 that moves back and forth in the X direction, and is a member for installing the semi-solidified metal M. Further, the inner circumferential surface of the injection sleeve 4 is fitted to the outer circumferential surface of the plunger tip 21 of the plunger 2. That is, the inner diameter D1 of the injection sleeve 4 is substantially equal to (slightly larger than) the outer diameter of the plunger tip 21. Further, the central axis α of the injection sleeve 4, the central axis of the plunger 2, and the central axis of the air cylinder 5 substantially coincide with each other.

  The injection sleeve 4 includes a first sleeve member 41, a second sleeve member 42, a third sleeve member 43, and a fourth sleeve member 44. As described above, the injection sleeve 4 is configured to be able to replace each member independently by being configured of a plurality of members.

  The first sleeve member 41, the second sleeve member 42, the third sleeve member 43, and the fourth sleeve member 44 are generally arranged in this order from the X2 direction side. The first sleeve member 41 and the second sleeve member 42 are fixed to each other by bolts (not shown). The second sleeve member 42 and the third sleeve member 43 are fixed to each other by bolts (not shown). The third sleeve member 43 and the fourth sleeve member 44 are fixed to each other by bolts (not shown).

  As shown in FIG. 4, the first sleeve member 41 is a member having an annular shape, and an opening at an end of the injection sleeve 4 in the X2 direction is formed. The inner diameter of the first sleeve member 41 is D1. Also, the first sleeve member 41 is a portion for introducing the plunger 2 into the injection sleeve 4. In FIG. 3, the inner peripheral surface of the first sleeve member 41 is fitted to the outer peripheral surface of the tip of the plunger 2 (plunger tip 21).

  As shown in FIG. 3, the second sleeve member 42 has a central axis α in the second sleeve member 42 in a state in which the container C in which the semisolid metal M is stored is gripped by the grip portion T1 of the transport robot T. It is configured to be placed on top. Further, the size of the second sleeve member 42 in the X direction is larger than the size of the container C in the X direction (the distance between the one opening C1 and the other opening C2). Further, the second sleeve member 42 is provided with an opening 421 for introducing the container C and the grip portion T1 into the second sleeve member 42 in order to arrange (install) the container C and the grip portion T1. The second sleeve member 42 is disposed at the X2 direction end of the first portion 42a having a first opening 421a, which will be described later, of the opening 421 and the second portion 42a of the opening 421. A second portion 42b having a portion 421b and a flange portion 422 disposed at the X1 direction end of the first portion are integrally included.

  The container C and the grip portion T1 of the transport robot T are configured to be disposed (introduced) into the second sleeve member 42 by being moved in the Y1 direction from the Y2 direction side of the second sleeve member 42. There is. Further, the container C and the grip portion T1 disposed in the second sleeve member 42 are configured to be retracted from the inside of the second sleeve member 42 by being moved in the Y2 direction.

  The opening 421 is generally provided on the Y2 direction side of the second sleeve member 42. That is, as shown in FIGS. 5 to 7, the second sleeve member 42 generally has a shape (half-cut shape) in which the Y2 direction side is cut away as viewed from the central axial direction (X direction) of the injection sleeve 4. It is formed.

  As shown in FIG. 3, the opening 421 includes a first opening 421 a and a second opening 421 b. The first opening 421 a is connected to the second opening 421 b from the side of the fixed mold 1 a which is one side (X1 direction side) of the injection sleeve 4 in the central axial direction. The second opening 421 b and the first opening 421 a are a container C in which the semi-solid metal M is accommodated, and a gripping portion T 1 of the transport robot T for gripping the container C is the inside of the second sleeve member 42. From the outside for placement (installation). The arrangement (installation) position of the container C and the grip portion T1 on the second sleeve member 42 will be described later.

  As shown in FIGS. 5 and 6, the second opening 421 b is provided in a predetermined range including the X2 direction end of the second sleeve member 42 in the central axial direction (X direction) of the injection sleeve 4. Further, the second opening 421b is notched in a range of less than half of the circumferential direction of the second sleeve member 42 when viewed from the central axial direction (X direction) of the injection sleeve 4. Further, the second opening 421b is notched in a range of 90 degrees or more in the circumferential direction of the second sleeve member 42 when viewed from the central axial direction (X direction) of the injection sleeve 4. Thereby, the second sleeve member 42 is C-shaped as viewed from the central axial direction (X direction) of the injection sleeve 4 in the range where the second opening 421 b in the central axial direction (X direction) of the injection sleeve 4 is provided. It is formed in shape. In addition, although it is an example, in FIG. 5 and FIG. 6, the range of about 140 degrees of the 2nd opening part 421b is notched.

  As shown in FIG. 3, the first opening 421 a is provided in a predetermined range sandwiched between the second opening 421 b and the flange portion 422 in the central axial direction (X direction) of the injection sleeve 4. In addition, the first opening 421 a has a cutout of a half or more of the circumferential direction of the second sleeve member 42 when viewed from the central axial direction (X direction) of the injection sleeve 4. Thereby, the second sleeve member 42 is laterally oriented as viewed from the central axial direction (X direction) of the injection sleeve 4 in a range where the first opening 421 a in the central axial direction (X direction) of the injection sleeve 4 is provided. It is formed in an arch shape. In addition, although it is an example, in FIG. 7, the range of about 230 degrees is notched in the 1st opening part 421a.

  As shown in FIG. 3, the inner diameter of the second sleeve member 42 in the range in which the second opening 421 b is provided in the central axial direction (X direction) of the injection sleeve 4 is D1. The inner diameter of the injection sleeve 4 closer to the flange portion 422 than the first opening 421a is D1. Further, in the central axial direction (X direction) of the injection sleeve 4, the inner diameter of the second sleeve member 42 in the range where the first opening 421 a is provided (when the imaginary circle shown by the two-dot chain line is assumed) It is large D2 (see FIG. 7).

  In short, the inner diameter D2 of the second sleeve member 42 is larger than the inner diameter D1 of the other portion of the injection sleeve 4 in the X direction range in which the first opening 421a is provided. Therefore, the second sleeve member 42 is configured such that the inner circumferential surface 421c of the inner diameter D2 does not contact the plunger tip 21 in the X direction range in which the first opening 421a is provided.

  Here, the width W1 in the X direction of the first opening 421a is smaller than the width W2 in the X direction of the plunger tip 21 of the plunger 2 (the contact surface of the plunger tip 21 with the injection sleeve 4) (W2> W1). Therefore, the second sleeve member 42 is configured such that the contact with the inner circumferential surface of the inner diameter D1 of the injection sleeve 4 is maintained when the plunger tip 21 passes through the X direction range in which the first opening 421a is provided. It is done. Thus, when the plunger tip 21 moves in the X direction, the second sleeve member 42 prevents the plunger tip 21 from disengaging from the first opening 421 a in the direction intersecting the X direction.

  One opening C1 on the small diameter side of the tapered container C is disposed on the inner side (small inner diameter D1 side) of the first opening 421a of the second sleeve member 42. The other opening C2 on the larger diameter side of the tapered container C is disposed on the inner side (larger inner diameter D2 side) of the second opening 421b of the second sleeve member 42. In this state, the X1 direction end of the container C is in contact with the X2 direction end of the third sleeve member 43. Further, one opening C1 on the small diameter side of the container C is disposed to face the plunger rod 22 and an extrusion tip 51a of the air cylinder 5, which will be described later, in the X direction. In addition, the gripping portion T1 of the transport robot T for gripping the container C is disposed on the outer peripheral side of the second opening 421b of the second sleeve member 42 on the inner side (large internal diameter D2 side).

  The flange portion 422 of the second sleeve member 42 is formed in an annular shape. The third sleeve member 43 is fitted to the inner peripheral surface of the flange portion 422.

  The third sleeve member 43 is in direct communication with the runner 1 d at the X1 direction end. Also, the third sleeve member 43 generally has a cylindrical shape. In the third sleeve member 43, the third sleeve member 43 is fitted to the outer peripheral surface near the end in the X2 direction, and the fourth sleeve member 44 is fitted to the outer peripheral surface near the end in the X1 direction ing. The fourth sleeve member 44 is formed in a cylindrical shape, and an end in the X1 direction is in contact with the fixed mold 1a.

  As shown in FIG. 8, the third sleeve member 43 has an inner diameter D1. That is, the third sleeve member 43 has an inner circumferential surface along the arc inside the second portion 42b shown in FIG.

(Configuration of air cylinder)
As shown in FIG. 3, the air cylinder 5 is incorporated in the plunger 2 so as to be disposed along the central axis α of the injection sleeve 4 and pushes out the semisolid metal M in the container C disposed in the injection sleeve 4. Thus, the semi-solidified metal M is configured to be installed in the injection sleeve 4.

  The air cylinder 5 includes an extrusion unit 51 and a main body (air cylinder main body) 52.

  The extrusion unit 51 is disposed so as to be capable of advancing and retracting in the injection sleeve 4, and is configured to extrude the semi-solidified metal M in the container C disposed in the injection sleeve 4. The extrusion portion 51 is formed smaller than the one opening C1 on the small diameter side of the container C disposed in the second sleeve member 42 when viewed from the central axis α direction (X direction) of the injection sleeve 4.

  The main body portion 52 is incorporated in the internal space portion 22 a of the plunger rod 22. The extrusion unit 51 includes an extrusion tip 51 a and an extrusion rod 51 b, and is a portion moved in the X direction by the main body unit 52.

  The push rod 51 b is passed through the through hole 21 a of the plunger tip 21, and one end in the X2 direction is connected to the main body 52. The extrusion tip 51a is provided at the other end of the extrusion rod 51b in the X1 direction, and is configured to close the through hole 21a from the tip of the plunger 2. That is, the extrusion tip 51a overlaps with (overlaps) at least the entire area of the through hole 21a when viewed from the central axis line α direction (X direction) of the injection sleeve 4, and is formed larger than the through hole 21a. ing. Further, the extrusion tip 51a is formed smaller than the one opening C1 on the small diameter side of the container C when viewed from the central axis line α direction (X direction) of the injection sleeve 4.

  The contact surface of the extrusion tip 51a with the plunger tip 21 is provided so as to surround the entire circumference of the X1 direction end of the through hole 21a. Thereby, when the extrusion tip 51a and the plunger tip 21 are in contact with each other, the semi-solidified metal M does not intrude into the plunger through the through hole 21a.

  The main body portion 52 is connected to the push rod 51 b and configured to move the push portion 51 back and forth into the injection sleeve 4. The extrusion unit 51 (the extrusion tip 51a) is moved in the horizontal direction (X direction) between the predetermined forward movement position PF2 and the reverse movement position PB by the main body 52. At the retracted position PB, the extrusion tip 51a is located at the X2 direction end of the second opening 421b of the second sleeve member 42, and the container C in which the semisolid metal M is accommodated by the transport robot T is 2 sleeve member 42). Then, when the extrusion tip 51a advances in the X1 direction, the semi-solidified metal M is pushed out of the container C by the extrusion tip 51a, and the semi-solidified metal M is placed in the third sleeve member 43. The advancing position PF2 of the extrusion tip 51a indicated by a broken line in FIG. 3 is a position at which the extrusion operation of the semi-solid metal M is completed, and the tip of the extrusion tip 51 a slightly protrudes from the other opening C2 on the large diameter side of the container C. It is a position.

(Step of die casting method)
Next, with reference to FIGS. 9-14, the process of the die-casting method by the injection device 100a for die-casting is demonstrated. Below, the process of the die-casting method is divided into six processes of the 1st-6th process, and is demonstrated. Six processes are performed in order of the 1st process, the 2nd process, the 3rd process, the 4th process, the 5th process, and the 6th process.

[First step]
The first step shown in FIG. 9 is a step of peeling the semi-solidified metal M in close contact with the container C from the container C. Specifically, in the first step, the container C in which the semi-solidified metal M including the bottom M1 (solidified metal) is accommodated is gripped by the gripping portion T1 of the transport robot T, and the large diameter side of the container C (the other The opening C2 side) is held in a state where the end is pressed against a flat wall surface P1 (such as a jig). Then, in the first step, the bottom portion M1 (solidified metal) accommodated in the container C is pressed toward the other opening C2 on the large diameter side by the peeling pressing portion P2 from the one opening C1 on the small diameter side of the container C. As a result, the semi-solidified metal M is peeled off from the container C. That is, the strong adhesion between the container C and the semi-solid metal M is released. The wall surface P1 and the peeling pressing portion P2 may be one configuration of the die casting molding injection device 100a, or may be provided in a dedicated device other than the die casting molding injection device 100a.

[Second step]
The second step shown in FIG. 10 is a step of disposing the container C containing the semi-solidified metal M in the injection sleeve 4. Specifically, in the second step, the container C containing the semi-solidified metal M peeled off in the first step is held by the holding portion T1 of the transfer robot T, and the robot arm portion of the transfer robot T It is disposed on the central axis α of the injection sleeve 4 by T2. At this time, the one opening C1 on the small diameter side of the container C is disposed inside (the small inner diameter D1 side) of the second opening 421b of the second sleeve member 42, and the other opening C2 on the large diameter side of the container C, Also, the grip portion T1 of the transport robot T is disposed inside (the large inner diameter D2 side) of the first opening 421a of the second sleeve member 42. Further, the container C is disposed by the transfer robot T such that the central axis α of the injection sleeve 4 and the central axis of the container C substantially coincide with each other. In the second step, both the plunger tip 21 and the extrusion tip 51a are disposed at the retracted position PB (near the end of the injection sleeve 4 in the X2 direction).

[Third step]
The third step shown in FIG. 11 is a step of pushing the semi-solidified metal M from the container C by the air cylinder 5 and installing the semi-solidified metal M on the injection sleeve 4. Specifically, in the third step, the semi-solid metal M is extruded from the container C by advancing the extrusion tip 51a and the extrusion rod 51b in the X1 direction, moving into the container C and moving to the advancing position PF2. The extruded semi-solid metal M is placed on the third sleeve member 43. At this time, the bottom portion M1 (solidified metal) is located at the X2 direction end (rearward in the injection direction) of the semi-solidified metal M.

[Step 4]
In the fourth step shown in FIG. 12, the extrusion tip 51 a and the extrusion rod 51 b disposed in the empty container C are pulled out of the container C. Then, the extrusion tip 51a is moved to the retracted position PB, and the through hole 21a of the plunger rod 22 is closed from the X1 direction side by the extrusion tip 51a.

[Step 5]
In the fifth step shown in FIG. 13, the empty container C held by the holding portion T1 of the transfer robot T is retracted from within the injection sleeve 4 by the robot arm portion T2 of the transfer robot T. Thus, a space for advancing and retracting the plunger 2 is secured in the injection sleeve 4. Note that the mold clamping is performed at any time before the sixth step.

[Step 6]
The sixth step shown in FIG. 14 is a step of injecting the semi-solidified metal M into the mold 1 and is the final step of the die casting method. Specifically, in the sixth step, the plunger rod 22 and the plunger tip 21 are advanced in the X1 direction by the drive unit 3 to move to the forward position PF1. Then, the semi-solidified metal M which is pushed out by the air cylinder 5 and installed in the injection sleeve 4 in the third step is injected into the mold 1 by the plunger tip 21. At this time, since the bottom portion M1 (solidified metal) is located at the X2 direction end of the semi-solidified metal M, the bottom portion M1 is moved in the X1 direction in a state of being in contact with the plunger tip 21 substantially. For this reason, the bottom M1 is introduced into the cavity 1c from the semisolid metal M having fluidity and is introduced into the cavity 1c prior to the bottom M1 while the semisolid metal M in the semisolid state is introduced into the cavity 1c. Does not disturb.

(Effect of the embodiment)
The effects of the present embodiment will be described below.

  In the present embodiment, as described above, the semi-solidified metal M in the container C, which is incorporated in the plunger 2 so as to be disposed along the central axis α of the injection sleeve 4 and disposed in the injection sleeve 4, is injected into the injection sleeve 4 An air cylinder 5 is provided to push the inside. Thus, the air cylinder 5 can be fixedly arranged at a predetermined position with respect to the injection sleeve 4, so that the position of the air cylinder 5 is moved and dispersed every injection molding relative to the injection sleeve 4 as in the prior art. Can be prevented. As a result, the shape of the semi-solidified metal M installed in the injection sleeve 4 can be stabilized by the air cylinder 5. Further, since the air cylinder 5 is built in the plunger 2, the combined size of the air cylinder 5 and the plunger 2 can be reduced in the central axial direction of the plunger 2. In addition, the air cylinder can exhibit stable performance in a high temperature environment as compared with a mechanism that pushes out the semi-solidified metal M such as an electric motor or a hydraulic motor.

  Further, in the present embodiment, as described above, the central axis α of the injection sleeve 4 and the central axis of the air cylinder 5 are made to substantially coincide with each other. Thus, the semi-solidified metal M can be pushed out along the central axis line α of the injection sleeve 4 by the air cylinder 5, so that the central axis of the air cylinder 5 is offset with respect to the central axis of the injection sleeve 4. As compared with the case of centering, when installing the semi-solidified metal M in the injection sleeve 4, it is possible to suppress the shape of the semi-solidified metal M from being broken.

  Further, in the present embodiment, as described above, the extrusion unit 51 is disposed in the air cylinder 5 so as to be movable back and forth in the injection sleeve 4 and extrudes the semi-solidified metal M in the container C disposed in the injection sleeve 4; An internal space 22a containing the main body 52 is provided in the plunger 2, and the end face 2a on the injection side communicates with the internal space 22a, and the extrusion 51 penetrates. Through holes 21a are provided. Thereby, the space for arranging the main body 52 in the plunger 2 can be secured by the internal space 22a, and the extrusion 51 is driven through the through hole 21a by the main body 52 incorporated in the plunger 2. It can be done.

  Further, in the present embodiment, as described above, the plunger 2 is provided with the plunger tip 21 having the through hole 21a and the plunger rod 22 having the internal space 22a. Thus, the internal space 22a can be disposed at a position different from that of the plunger tip 21 in direct contact with the high temperature semi-solid metal M. For this reason, it can suppress that the main-body part 52 incorporated in the interior space part 22a is expose | bleached to high temperature.

  Further, in the present embodiment, as described above, the central axis of the pushing portion 51 and the central axis α of the plunger tip 21 substantially coincide with each other. As a result, the semi-solidified metal M extruded by the extrusion unit 51 and installed in the injection sleeve 4 can be injected into the mold 1 by the plunger tip 21 whose central axis substantially coincides with the extrusion unit 51. The semi-solidified metal M can be injected into the mold 1 more stably.

  Further, in the present embodiment, as described above, the extrusion rod 51b is inserted into the through hole 21a and one end is connected to the main body 52, and the other end of the extrusion rod 51b is disposed through the through hole 21a. And an extrusion tip 51a for closing 21a from the front end side of the plunger 2. Thereby, since the through hole 21a can be closed by the extrusion tip 51a, it is possible to prevent the semisolid metal M from intruding into the plunger 2 from the through hole 21a. In addition, the main body 52 and the extrusion tip 51a contained in the plunger rod 22 can be easily connected by the extrusion rod 51b.

  Further, in the present embodiment, as described above, with the container C held by the transfer robot T in the injection sleeve 4, the central axis of the injection sleeve 4 in the injection sleeve 4 is the container C and the transfer robot T. An opening 421 is provided for placement on a line. Thus, the container C and the transport robot T can be easily introduced into the injection sleeve 4 through the opening 421.

  Further, in the present embodiment, as described above, the predetermined axial direction of the injection sleeve 4 in which the gripping portion T1 provided at the tip of the robot arm T2 constituting the transfer robot T is disposed in the opening 421 A first opening 421a is formed by cutting out a range of half or more of the circumferential direction of the injection sleeve 4 in the range. As a result, a large introduction port for easily introducing the container C and the grip portion T1 into the injection sleeve 4 can be secured in the injection sleeve 4 by the first opening 421a.

  Further, in the present embodiment, as described above, the periphery of the injection sleeve 4 is connected to the first opening 421a at one end of the opening 421 and within a predetermined range in the central axial direction of the injection sleeve 4 in which the container C is disposed. A second opening 421b is provided which cuts out the range of less than half of the direction. In this way, by making the range where the injection sleeve 4 is not cut out less than half of the circumferential direction, the contact between the injection sleeve 4 and the plunger 2 is ensured in a range larger than half of the circumferential direction of the injection sleeve 4 Can. As a result, when the plunger 2 moves back and forth in the injection sleeve 4 in the range in which the second opening 421 b is provided, the plunger 2 can be stably moved along the inner peripheral surface of the injection sleeve 4.

  Moreover, in the present embodiment, as described above, the one opening C1 on the small diameter side of the tapered container C is disposed inside the second opening 421b, and the container C is disposed inside the first opening 421a. The other opening C2 on the large diameter side is disposed. Thus, the other opening C2 on the large diameter side of the container C can be disposed on the side of the first opening 421a where the notch range in the circumferential direction is large, so that the space in the injection sleeve 4 can be efficiently utilized. Container C can be arranged.

[Modification]
It should be understood that the embodiment disclosed herein is illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the above description of the embodiment but by the scope of claims, and further includes all modifications (variations) within the meaning and scope equivalent to the scope of claims.

  For example, although the example which comprised the injection sleeve by multiple members was shown in the said embodiment, this invention is not limited to this. In the present invention, the injection sleeve may be constituted by a single member.

  Moreover, in the said embodiment, although the extrusion mechanism showed the example which consists of an air cylinder, this invention is not limited to this. In the present invention, the extrusion mechanism may be configured to have a configuration other than an air cylinder such as a hydraulic cylinder or a motor.

  Moreover, in the said embodiment, although the example comprised so that the through-hole of a plunger tip may be closed with an extrusion tip was shown, this invention is not limited to this. In the present invention, the through hole of the plunger tip may be closed by the push rod without providing the push tip in the push mechanism.

  In the above embodiment, as viewed from the central axis direction of the injection sleeve, the first opening is configured to cut out a half or more range in the circumferential direction of the injection sleeve, but the present invention It is not limited. In the present invention, the first opening may be cut out in a range of less than half of the circumferential direction of the injection sleeve when viewed from the central axial direction of the injection sleeve.

  In the above embodiment, as viewed from the central axial direction of the injection sleeve, the second opening portion cuts out a range less than half of the circumferential direction of the injection sleeve, but the present invention is not limited thereto. It is not limited. In the present invention, the second opening may cut out a half or more range in the circumferential direction of the injection sleeve when viewed from the central axial direction of the injection sleeve.

  Further, in the above embodiment, the semisolid metal contained in the close contact state in the container is pressed from one opening of the container toward the other opening by a configuration different from the pressing mechanism. Although the example which provided the process of peeling off from was shown, this invention is not limited to this. In the present invention, the semi-solid metal may be peeled from the container by pressing the semi-solid metal housed in close contact with the container from the one opening of the container toward the other opening by the pressing mechanism.

  In the above embodiment, the central axis of the injection sleeve and the central axis of the extrusion mechanism are substantially aligned. However, the present invention is not limited to this. In the present invention, the central axis of the injection sleeve and the central axis of the extrusion mechanism may be offset.

  Moreover, although the example comprised so that the central axis line of an extrusion part and the central axis line of a plunger tip might substantially correspond was shown in the said embodiment, this invention is not limited to this. In the present invention, the central axis of the extrusion portion may be offset from the central axis of the plunger tip.

1 mold 2 plunger 2a end face on the injection side 4 injection sleeve 5 air cylinder (extrusion mechanism)
Reference Signs List 21 plunger tip 21a through hole 22 plunger rod 22a internal space portion 51 extrusion portion 51a extrusion tip 51b extrusion rod 52 main body portion 100a injection device for die casting 421 opening 421a first opening 421b second opening C container C1 one opening C2 Other opening M Semisolid metal T Transport robot (Transport device)
T1 Robot arm T2 Gripping part α Center axis of injection sleeve

Claims (12)

An injection sleeve which can be disposed in a state in which a cylindrical container containing semi-solid metal is held by a conveyance device;
A plunger for injecting the semi-solidified metal disposed in the injection sleeve into a mold;
Die-casting mechanism incorporated in the plunger so as to be disposed along the central axis of the injection sleeve, and extruding the semi-solidified metal in the container disposed in the injection sleeve into the injection sleeve Injection device for molding.   The die-casting injection device according to claim 1, wherein a central axis of the injection sleeve and a central axis of the extrusion mechanism substantially coincide with each other. The extruding mechanism is movably disposed in the injection sleeve, and has an extruding portion extruding the semi-solid metal in the container disposed in the injection sleeve, and a main body portion driving the extruding portion. ,
3. The plunger according to claim 1, further comprising: an inner space portion containing the main body portion; and a through hole which communicates with the inner space portion at an end face on the injection side and through which the extrusion portion penetrates. Die-casting injection device as described.   The die-casting injection device according to claim 3, wherein the plunger includes a plunger tip provided with the through hole and a plunger rod provided with the internal space portion.   The die-casting injection device according to claim 4, wherein a central axis of the extrusion portion and a central axis of the plunger tip substantially coincide with each other.   The extrusion part is inserted into the through hole and one end is connected to the main body part, and an extrusion tip provided at the other end of the extrusion rod and closing the through hole from the tip side of the plunger The injection apparatus for die-casting formation of any one of Claims 3-5.   The injection sleeve is provided with an opening for arranging the container and the conveyance device on the central axis of the injection sleeve in the injection sleeve, with the container held by the conveyance device. The injection device for die-casting formation of any one of Claims 1-6.   The opening cuts a half or more of the circumferential direction of the injection sleeve within a predetermined range in the central axial direction of the injection sleeve in which the gripping portion provided at the tip of the robot arm constituting the transfer device is disposed 8. The die-casting injection device according to claim 7, having a missing first opening.   The opening has a first end connected to the first opening, and a second opening that cuts out less than a half of the circumferential direction of the injection sleeve within a predetermined range in the central axial direction of the injection sleeve in which the container is disposed The injection device for die casting according to claim 8, further comprising:   One opening on the small diameter side of the tapered container is disposed inside the second opening, and the other opening on the large diameter side of the container is disposed inside the first opening. The injection device for die casting according to claim 9.   The die-casting injection device according to any one of claims 1 to 10, wherein the extrusion mechanism has an air cylinder. Peeling the semi-solidified metal from the container by pressing the semi-solidified metal housed in close contact with the container from one opening of the container toward the other opening;
Holding the container containing the scraped semi-solid metal by a transport device and placing the container on a central axis of an injection sleeve;
Extruding the semi-solidified metal in the container disposed in the injection sleeve into the injection sleeve using an extrusion mechanism incorporated in a plunger;
Injecting the semi-solidified metal extruded into the injection sleeve into the mold using the plunger.

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