JP5883054B2 - Die casting mold and die casting method - Google Patents

Description

 The present invention relates to a die-casting die and a die-casting method, and more particularly to a die-casting die having an improved fixing structure of a buried die and a die-casting method performed using the die-casting die.

 To replace a buried die installed on a fixed die or movable die, it is necessary to disassemble the die-casting die after removing the entire die-casting die from the casting machine, and then removing the die casting die. Takes a lot of labor and time. Therefore, it has been proposed in Patent Document 1 below to make it possible to replace the insert on the machine without disassembling the die casting mold.

JP-A-6-190531

  However, since patent document 1 is a structure which fixes a buried pad with a volt | bolt from the cavity side, the trace of the head of a volt | bolt will remain in a die-cast product. Therefore, there is a problem that it cannot be applied to the case of manufacturing a die-cast product in which the trace of the head of the bolt is not allowed to remain.

  The present invention has been made in view of such points, and the object of the present invention is to leave traces such as bolts on the die-cast product even when the insert is configured to be replaceable on the casting machine. It is an object of the present invention to provide a die casting mold that does not occur and a die casting method using the die casting mold.

A die casting mold 1 according to the present invention includes a fixed die composed of a fixed die and a fixed holder, and a movable die 10 composed of a movable die 12 and a movable holder 11, and at least one of the fixed die or the movable die 12 A recess 12A is formed in the die casting mold 1 in which a recess 13 defining a cavity is installed in the recess 12A. A hydraulic cylinder is connected to a connecting portion 14 provided at the rear end of the insert 13. 15 is connected, and the hydraulic cylinder 15 is fixed to the fixed holder or the movable holder 11, and the buried element 13 has a rear end surface 13A of the buried element 13 abutting against a bottom surface 12B of the recess 12A. It is configured to move by driving of the hydraulic cylinder 15 between a buried fixing position and a buried replacement position where the whole buried 13 is detached from the recess 12A.

  The die casting method according to the present invention is characterized in that die casting is performed using the above-described die casting mold 1.

  According to the present invention, there is an effect that a die-cast product can be manufactured without leaving traces of bolts or the like even when the filling is replaceable on the casting machine.

It is principal part sectional drawing of the die-casting metal mold | die in one Embodiment of this invention, and shows the state in which a buried is in a buried fixing position. It is principal part sectional drawing of the die-casting metal mold | die of the embodiment, and shows the state which a buried element exists in a buried exchange position. It is principal part sectional drawing of the die-casting metal mold | die of the embodiment, and shows the state from which the burial was removed.

  A die casting mold according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the die casting mold 1 includes a movable mold 10 and a fixed mold (not shown). The movable mold 10 includes a movable holder 11 and a movable die 12 fitted and accommodated in a recess 11 </ b> A formed in the movable holder 11. The fixed mold (not shown) is similarly configured by a fixed holder and a fixed die. The movable mold 10 is movable in the moving direction of the movable mold 10 indicated by arrows A ← → A ′, and a cavity is defined inside the die casting mold 1 by contacting with the fixed mold. A concave 12A is formed in the movable die 12, and a buried element 13 having a portion defining a cavity is accommodated in the concave 12A.

  A hydraulic cylinder 15 is provided on the rear surface side of the movable holder 11, and an output shaft 16 of the hydraulic cylinder 15 is connected to an extension shaft 18 by a joint 17. The extension shaft 18 has a rod-shaped long shaft portion 18A connected to the joint member 17, a small diameter portion 18B having a diameter smaller than that of the long shaft portion 18A, and a large diameter portion 18C having a diameter larger than that of the long shaft portion 18A. doing. When the hydraulic cylinder 15 is driven, the extension shaft 18 can advance and retreat in the moving direction of the movable mold 10. A hole 19A is formed at the center position of the support plate 19 that supports the hydraulic cylinder 15. In the buried state where the extension shaft 18 is retracted by the hydraulic cylinder 15 as shown in FIG. The output shaft 16 and the joint 17 are positioned in the hole 19 </ b> A of the support plate 19. A plurality of holes 19B are formed around the hole 19A of the support plate 19, and a bolt 21 that passes through the hole 19B and the cylindrical support member 20 is screwed into the screw hole 11B of the movable holder 11, The support plate 19 is fixed to the movable holder 11. The extension shaft 18 passes through a hole 11 </ b> C formed in the movable holder 11 and a hole 12 </ b> C formed in the movable die 12. A connecting portion 14 for connecting the extension shaft 18 is provided at the rear end of the buried member 13. The connecting portion 14 is a groove that opens to the side surface and the rear surface 13A of the buried element 13, and has a narrow width groove 14A in the direction connecting the front and back of the paper surface of FIG. 1, and the same direction as the narrow width groove 14A. A wide groove 14B having a large width and a groove depth from the side surface of the buried element 13 formed deeper than the narrow groove 14A is provided. The small diameter portion 18B of the extension shaft 18 is inserted into the narrow groove 14A, and the large diameter portion 18C of the extension shaft 18 is inserted into the wide groove 14B. As shown in FIG. 1, in a state where the extension shaft 18 is retracted by the hydraulic cylinder 15, the connecting portion 14 of the implant 13 is pulled in the direction of arrow A in FIG. 1 by the large diameter portion 18C of the extension shaft 18. The inserted state is maintained, and the buried element 13 is fixed to the movable die 12. In this buried state, the rear end surface 13A of the buried member 13 is in contact with the bottom surface 12B of the concave portion 12A of the movable die 12.

  When exchanging the pad 13, the hydraulic cylinder 15 is driven to advance the extension shaft 18 in the direction of arrow A ′ in FIG. 1. When the extension shaft 18 moves forward, the implant 13 is held by the large-diameter portion 18C of the extension shaft 18, and as shown in FIG. 2, the entire insert 13 is moved to the implant replacement position where it is detached from the recess 12A of the movable die 12. Advance. As shown in FIG. 3, the implant 13 that has been advanced to the implant replacement position removes the large-diameter portion 17 </ b> C and the small-diameter portion 17 </ b> B of the extension shaft 17 inserted in the connecting portion 14 from the connecting portion 14. Exchanged.

  Next, a die casting method performed using the die casting mold 1 of the present embodiment will be described. In the die-casting method according to the present embodiment, first, the movable die 10 is brought into contact with the fixed die, the die-casting die 1 is clamped, and the cavity is formed using the buried 13 fixed to the movable die 12 by the hydraulic cylinder 15. Is defined. Next, a molten metal such as an aluminum alloy is supplied into a sleeve provided in the fixed mold, and the cavity is filled with the molten metal with a plunger tip. Then, after the molten metal in the cavity is cooled and solidified, the movable mold 10 is moved to perform mold opening, and the die-cast product is taken out from the die-cast mold 1. The above is the die casting method.

  In the die-casting die 1 and the die-casting method using the same die-casting die of the present embodiment, a hydraulic cylinder 15 is connected to a connecting portion 14 provided at the rear end portion of the buried member 13, and the buried member 13 is Between the buried fixing position where the rear end surface 13A of the filling 13 abuts the bottom surface 12B of the concave portion 12A of the movable die 12, and the buried replacement position where the entire buried member 13 is detached from the concave portion 12A of the movable die 12. Is moved by driving of the hydraulic cylinder 15. Since the movable die 10 is separated from the fixed die, the die casting die 1 is opened, the hydraulic cylinder 15 is driven, and the implant 13 is moved to the implant replacement position, so that the implant 13 can be replaced. It is not necessary to carry out the die-casting die 1 outside the casting machine when the buried member 13 is replaced. Further, the buried cylinder 13 is moved to the buried fixing position by the hydraulic cylinder 15 connected to the connecting portion 14 provided at the rear end 13A of the buried 13 and is fixed to the movable die 12. There are no bolts or the like for fixing the buried element 13 on the cavity surface of the child 13, and no unnecessary traces remain on the die-cast product.

  The present invention is not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims. For example, in the present embodiment, the buried element 13 is fixed to the recess 12A formed in the movable die 12. However, the hydraulic cylinder is fixed to the fixed holder, and the embedded element is fixed to the recessed part formed in the fixed die. It may be.

  The buried element 13 may be a cast pin that forms a hole in a die-cast product.

DESCRIPTION OF SYMBOLS 1 Die-cast metal mold | die 10 Movable type | mold 11 Movable holder 11A Recessed part 11B Screw hole 11C Hole part 12 Movable die 12A Recessed part 12B Bottom face 12C Hole part 13 Buried 13A Rear end face 14 Connection part 14A Narrow groove 14B Wide groove 15 Hydraulic cylinder 16 Output shaft 17 Joint 18 Extension shaft 18A Long shaft portion 18B Small diameter portion 18C Large diameter portion 19 Support plate 19A Hole 19B Hole 20 Support member 21 Bolt

Claims (2)

A fixed die composed of a fixed die and a fixed holder, and a movable die composed of a movable die and a movable holder, and a recess is formed in at least one of the fixed die or the movable die, and a cavity is formed in the recess In the die-casting mold where the burial that defines
A hydraulic cylinder is connected to a connecting portion provided at the rear end of the buried,
The hydraulic cylinder is fixed to the fixed holder or the movable holder,
The implant is driven between the implant fixing position where the rear end surface of the implant is in contact with the bottom surface of the recess and the implant replacement position where the entire implant is detached from the recess. A die-casting mold characterized in that the die-casting mold is configured to move. A die casting method, wherein die casting is performed using the die casting mold according to claim 1 .

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