WO2021205670A1 - Die casting method, die casting device and mold - Google Patents

Die casting method, die casting device and mold Download PDF

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Publication number
WO2021205670A1
WO2021205670A1 PCT/JP2020/016224 JP2020016224W WO2021205670A1 WO 2021205670 A1 WO2021205670 A1 WO 2021205670A1 JP 2020016224 W JP2020016224 W JP 2020016224W WO 2021205670 A1 WO2021205670 A1 WO 2021205670A1
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Prior art keywords
speed
injection
molten metal
low
die casting
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PCT/JP2020/016224
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French (fr)
Japanese (ja)
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森川　巌
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株式会社ダイエンジニアリング
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Priority to PCT/JP2020/016224 priority Critical patent/WO2021205670A1/en
Publication of WO2021205670A1 publication Critical patent/WO2021205670A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/14—Machines with evacuated die cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/32—Controlling equipment

Definitions

  • the present invention relates to a die casting method, a die casting device, and a mold.
  • Vacuum die casting is a die casting in which the gas in the cavity of the mold is sucked by a vacuum device, the molten metal injected into the sleeve is injected by an injection device, and the cavity is filled through a runner or the like to cast a product.
  • the method Regarding the injection of the molten metal by the injection device, for example, as shown in FIG. 8, a low-speed injection step S20 for injecting the molten metal with the injection speed of the injection device as a low-speed injection speed is performed until just before the molten metal enters the cavity. Next, a high-speed injection step S40 for injecting the molten metal is performed with the injection speed of the injection device as the high-speed injection speed (for example, Patent Document 1).
  • the above-mentioned vacuum die casting since the cross section of the runner is sharply narrowed as compared with the cross section in the sleeve, the flow velocity of the molten metal injected at a low injection speed in the runner becomes relatively high, and the runner in the molten metal becomes a runner. The gas inside is caught. As a result, the above-mentioned vacuum die casting has a problem that the quality of the product is deteriorated, such as the formation of cavities in the product.
  • an object of the present invention is to provide a die casting method and a die casting apparatus capable of preventing clogging of the vacuum apparatus due to molten metal and producing a high quality product in the vacuum die casting. At the same time, it is an object of the present invention to provide a mold suitable for the die casting method.
  • the die casting method of one aspect of the present invention is a die casting method in which the molten metal in the sleeve is injected into the cavity through the molten metal passage including the runner by an injection device while sucking the gas in the cavity of the mold.
  • a low-speed injection process in which the device injects molten metal at a low-speed injection speed an ultra-low-speed injection process in which the injection device injects molten metal at an ultra-low injection speed slower than the low-speed injection speed, and a high-speed injection in which the injection device is high-speed.
  • a high-speed injection process for injecting molten metal at a high speed is provided in order.
  • the cross section of the runner has an area where the flow velocity of the molten metal in the runner is 0.30 m / s to 0.60 m / s when the injection speed of the injection device is an ultra-low injection speed. It is preferable that it is set as such.
  • the ultra-low speed injection speed is preferably a speed in the range of 0.03 m / s to 0.06 m / s.
  • the cross section of the runner is preferably a flat, substantially trapezoidal shape.
  • the ultra-low speed injection step is performed until just before the molten metal enters the cavity.
  • the low speed injection step is preferably performed until just before the molten metal enters the molten metal passage.
  • the suction of the gas in the cavity of the mold is performed during the high-speed injection step.
  • the die casting device of one aspect of the present invention includes a mold having a cavity, a sleeve capable of accommodating the molten metal inside, an injection device for injecting the molten metal in the sleeve, and a passage for sending the molten metal in the sleeve to the cavity. It is provided with a molten metal passage including a runner, a suction passage which is a passage for sucking gas in the cavity, a vacuum device connected to the suction passage and sucking gas in the cavity, and a control unit.
  • the control unit sets the injection speed of the injection device to a low speed injection speed, which is a low speed, then sets the injection speed of the injection device to an ultra-low speed injection speed slower than the low speed injection speed, and then sets the injection speed of the injection device to a high speed injection speed. Control the injection of the injection device so that it is the speed.
  • the cross section of the runner has an area where the flow velocity of the molten metal in the runner is 0.30 m / s to 0.60 m / s when the injection speed of the injection device is an ultra-low injection speed. It is preferable that it is set as such.
  • the ultra-low speed injection speed is preferably 0.03 m / s to 0.06 m / s.
  • injection at an ultra-low injection speed is preferably performed until just before the molten metal enters the cavity.
  • injection at a low injection speed is preferably performed until just before the molten metal enters the molten metal passage.
  • control unit may control suction by the vacuum device.
  • control unit may control the vacuum device so as to suck the gas in the cavity including while the injection speed of the injection device is the high injection speed.
  • the mold of one aspect of the present invention is a mold used for a die casting device that injects molten metal by an injection device, and is a cavity, a passage for sending the molten metal to the cavity, and a molten metal passage including a runner. It is provided with a suction passage, which is a passage for sucking gas in the cavity.
  • the cross section of the runner has an ultra-low speed injection speed slower than the low speed injection speed at which the injection speed of the injection device is low, and the flow velocity of the molten metal in the runner is 0.30 m / s. It is preferably set to be about 0.60 m / s.
  • the ultra-low speed injection speed is preferably 0.03 m / s to 0.06 m / s.
  • the cross section of the runner is preferably a flat and substantially trapezoidal shape.
  • the die casting method and the die casting device in the vacuum die casting, it is possible to prevent the vacuum device from being clogged by the molten metal and to manufacture a high quality product. Further, it is possible to provide a mold suitable for a die casting method and a die casting apparatus.
  • the die casting device 1 includes a mold 10, a sleeve 20, an injection device 40, and a vacuum device 50.
  • the mold 10 includes a fixed mold 11 and a movable mold 13.
  • the fixed mold 11 and the movable mold 13 are made of a metal such as steel.
  • the movable type 13 is movable in the horizontal direction (for example, in the front-rear direction).
  • the movable mold 13 is moved by a movable device (not shown), and is molded and opened with the fixed mold 11.
  • a cavity 15 for casting a product is provided between the fixed mold 11 and the movable mold 13.
  • a suction passage 17 leading from the cavity 15 to the outside of the mold 10 is provided in order to suck the gas in the cavity 15.
  • the sleeve 20 can accommodate the molten metal inside.
  • the sleeve 20 has a cylindrical shape and is made of a metal such as steel.
  • One end of the sleeve 20 is attached to the mold 10 with the shaft parallel to the horizontal direction (for example, the front-rear direction).
  • the sleeve 20 is provided with a pouring port 22 which is an opening that penetrates inside and outside.
  • the molten metal M is injected into the sleeve 20 from the pouring port 22.
  • a molten metal passage 30 which is a passage for sending the molten metal M in the sleeve 20 into the cavity 15 is provided between the inside of the sleeve 20 and the cavity 15.
  • the molten metal passage 30 includes an introduction path 32, a runner 34, and a gate runner 36 in this order from the sleeve 20 toward the cavity 15.
  • the introduction path 32 is a portion where the molten metal M in the sleeve 20 is introduced into the molten metal passage 30, and is connected to the inside of the sleeve 20.
  • the introduction path 32 is formed by a sleeve 20 and a diversion element 19 of a movable type 13.
  • the runner 34 and the gate runner 36 are provided between the fixed mold 11 and the movable mold 13.
  • the runner 34 is connected to the introduction path 32.
  • the gate runner 36 is connected to the runner 34 and the cavity 15.
  • the injection device 40 is a device for injecting the molten metal M in the sleeve 20 into the cavity 15 of the mold 10.
  • the injection device 40 includes a tip 42, a rod 44, and a drive unit 46.
  • the chip 42 has a substantially columnar shape.
  • the tip 42 can move forward and backward coaxially with the sleeve 20 in the sleeve 20.
  • the tip of the rod 44 is connected to the rear surface of the tip 42, and the drive unit 46 advances and retreats the rod 44, so that the tip 42 advances and retreats in the sleeve 20.
  • the movement of the tip 42 forward in other words, to the mold 10 side is referred to as injection or injection of the injection device 40, and the speed is referred to as injection speed.
  • the molten metal M injected into the sleeve 20 is filled into the cavity 15 through the molten metal passage 30 by injecting it with the injection device 40.
  • the cross-sectional area shows that the flow velocity of the molten metal M in the runner 34 is 0. It is set to be 30 m / s to 0.60 m / s.
  • the low-speed injection speed is, for example, a speed in the range of 0.15 m / s to 0.30 m / s.
  • the cross-sectional area of the runner 34 is such that the flow velocity of the molten metal M in the runner 34 is 0.30 m / s to 0 when the ultra-low speed injection speed is in the range of 0.03 m / s to 0.06 m / s. It is preferably set to be .60 m / s.
  • the cross-sectional area of the runner 34 is such that the flow velocity of the molten metal M in the runner 34 is 0.30 m / s when the ultra-low speed injection speed is in the range of 0.04 m / s to 0.05 m / s. It is more preferable that the value is set to about 0.60 m / s.
  • the flow velocity of the molten metal M in the runner 34 can be, for example, the average cross-sectional flow velocity of the runner 34.
  • the shape of the cross section of the runner 34 is not particularly limited, but as shown in FIG. 2, it is preferable to have a flat trapezoidal shape.
  • the area of the cross section of the runner 34 can be obtained, for example, from the following continuity equation (1).
  • A1V1 A2V2 (1)
  • A1 is the area of the cross section in the chip 42 or the sleeve 20
  • V1 is the injection speed of the injection device 40 (the flow velocity of the molten metal M in the sleeve 20)
  • A2 is the area of the cross section of the runner 34
  • V2 is the runner 34. It is the flow velocity of the molten metal M in the inside.
  • the vacuum device 50 is for sucking the gas in the cavity 15 of the mold 10.
  • the vacuum device 50 includes a vacuum drive unit 52, a pipe 54, and a valve 56.
  • the vacuum drive unit 52 is connected to the suction passage 17 of the mold 10 via the pipe 54.
  • the vacuum drive unit 52 sucks the gas in the cavity 15 of the mold 10 through the pipe 54 and the suction passage 17.
  • the valve 56 is for opening and closing a passage for sucking gas in the cavity 15.
  • the valve 56 is provided in the suction passage 17 of the mold 10 to open and close the suction passage 17.
  • the vacuum device 50 can suck the gas in the cavity 15 when the valve 56 opens the suction passage 17, and cannot suck the gas in the cavity 15 when the valve 56 closes the suction passage 17.
  • the control unit 60 controls the operation of each configuration of the die casting device 1.
  • the control unit 60 is composed of a computer including a CPU, a storage device such as a memory, and the like.
  • the control unit 60 is electrically connected to the injection device 40, the movable device, and the vacuum device 50 (valve 56 and vacuum drive unit 52).
  • the control unit 60 transmits signals to the injection device 40, the movable device, and the vacuum device 50 by the program provided in the control unit 60 and the control information input by the input unit of the control unit 60 to perform these operations.
  • Control controls the moving direction (injection direction) of the chip 42 of the injection device 40 and its speed by controlling the drive unit 46 of the injection device 40.
  • control unit 60 controls the movable device and moves the movable mold 13 to control the mold clamping and the mold opening of the mold 10. Further, the control unit 60 controls the valve 56 and the vacuum drive unit 52 of the vacuum device 50 to control the opening and closing of the valve 56 and the drive and suction force (decompression pressure) of the vacuum drive unit 52.
  • the die casting method includes a pre-injection process S10, a low-speed injection process S20, an ultra-low-speed injection process S30, a high-speed injection process S40, a vacuum process S50, and a post-injection process S60. ..
  • the fixed mold 11 and the movable mold 13 are molded. Further, the molten metal M is injected into the sleeve 20 from the pouring port 22 of the sleeve 20.
  • the molten metal M is a molten metal M of a metal material such as aluminum.
  • the molten metal M is injected by the injection device 40.
  • the injection of the molten metal M by the injection device 40 is performed in the order of the low-speed injection step S20, the ultra-low-speed injection step S30, and the high-speed injection step S40.
  • the injection device 40 injects the molten metal M at a constant low-speed injection speed through a transition stage in which the injection device 40 shifts from a stopped state to a low-speed low-speed injection speed.
  • the low-speed injection speed is, for example, a speed in the range of 0.15 m / s to 0.30 m / s.
  • the low-speed injection step S20 is performed until just before the molten metal M enters the molten metal passage 30 (introduction path 32).
  • the injection device 40 injects the molten metal M at a constant ultra-low injection speed through a transition step of shifting from the low speed injection speed to the ultra low speed injection speed.
  • the ultra-slow injection speed is slower than or sufficiently slower than the slow injection speed.
  • the ultra-low injection speed is preferably, for example, a speed in the range of 0.03 m / s to 0.06 m / s, and more preferably a speed in the range of 0.04 m / s to 0.05 m / s.
  • the flow velocity of the molten metal M in the runner 34 is theoretically in the range of 0.30 m / s to 0.60 m / s.
  • the injection device 40 injects the molten metal M at a constant high-speed injection speed through a transition stage of shifting from the ultra-low-speed injection speed to the high-speed injection speed, and then stops the injection while decelerating the speed.
  • the fast injection speed is faster than or sufficiently faster than the slow injection speed.
  • the high-speed injection speed is, for example, a speed in the range of 2.00 m / s to 8.00 m / s.
  • the high-speed injection step S40 is performed immediately before the molten metal M enters the cavity 15, for example, immediately before entering the gate runner 36 or the gate, until the molten metal M is sufficiently filled in the cavity 15.
  • the vacuum step S50 is also performed.
  • the gas in the cavity 15 is sucked by the vacuum device 50.
  • the vacuum step S50 the gas in the cavity 15 is sucked so that the pressure in the cavity 15 becomes, for example, ⁇ 10 kpa or more.
  • the vacuum step S50 is performed including during the high-speed injection step S40.
  • the vacuum step S50 starts in the low speed injection step S20 and ends after the high speed injection step S40.
  • the vacuum step S50 can be started, for example, 0.4s to 0.6s before the high-speed injection step S40.
  • the post-injection step S60 is performed.
  • the fixed mold 11 and the movable mold 13 are opened, and the cast product is taken out.
  • the molten metal M is injected into the cavity 15 by the injection device 40 in the order of the low speed injection step S20, the ultra-low speed injection step S30, and the high speed injection step S40. Since the ejection is suppressed, clogging of the vacuum device 50 such as the valve 56 due to the molten metal M can be prevented. Further, as a result, the die casting method and the die casting device 1 can reduce the entrainment of gas in the molten metal M in the molten metal passage 30 when the molten metal M is injected by the injection device 40, so that a high quality product can be manufactured. ..
  • the cross section of the runner 34 has a flow velocity of the molten metal M in the runner 34 of 0.30 m / s when the injection speed of the injection device 40 is an ultra-low injection speed.
  • the flow velocity By setting the flow velocity to about 0.60 m / s, clogging of the vacuum apparatus 50 can be further prevented, and a high-quality product can be manufactured.
  • the die casting method and the die casting device 1 in the ultra-low speed injection step S30, by setting the ultra low speed injection speed to 0.03 m / s to 0.06 m / s, clogging of the vacuum device 50 is further prevented. At the same time, it is possible to manufacture high quality products. Further, as a result, the die casting method and the die casting device 1 have a cross section of the runner 34 as compared with the case where the flow velocity of the molten metal M in the runner 34 is set to 0.30 m / s to 0.60 m / s at a low injection speed. Since the area of the molten metal M in the runner 34 can be reduced, the solidification time of the molten metal M in the runner 34 can be shortened, the manufacturing time of the product can be shortened, and the casting yield can be improved.
  • the die casting method and the die casting device 1 by making the cross section of the runner 34 a substantially trapezoidal shape that is flat, clogging of the vacuum device 50 is further prevented and a high quality product is manufactured. be able to.
  • the time for injecting the molten metal M at a low injection speed can be relatively long. It is possible to prevent the molten metal M from solidifying before the molten metal M is filled in the cavity 15, and further shorten the manufacturing time of the product.
  • the mold 10 it is possible to provide a mold suitable for the die casting method and the die casting device 1.
  • the present invention is not particularly limited to the above embodiment, and can be appropriately modified within the scope of the gist of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A die casting method is provided which, in vacuum die casting, prevents clogging of a vacuum device by molten metal and enables manufacture of high-quality products. In addition, a mold and die casting device that are suitable to the die casting method are provided.　In this die casting method, molten metal in a sleeve is injected, by means of an injection device, into a cavity in a mold via a molten metal passage that includes a runner while suctioning the gas inside of the cavity; the die casting method involves, in order, a low-speed injection step (S20) in which the injection device injects molten metal at a low injection speed, which is a low speed, a super-low-speed injection step (S30) in which the injection device injects molten metal at a super-low injection speed, which is lower than the low injection speed, and a high-speed injection step (S40) in which the injection device injects molten metal at a high injection speed, which is a high speed.

Description

ダイカスト方法、ダイカスト装置および金型Die casting method, die casting equipment and mold
　本発明は、ダイカスト方法、ダイカスト装置および金型に関するものである。 The present invention relates to a die casting method, a die casting device, and a mold.
　真空ダイカストは、金型のキャビティ内のガスを真空装置で吸引しつつ、スリーブ内に注入された溶湯を、射出装置により射出し、ランナー等を介してキャビティ内に充填して製品を鋳造するダイカスト方法である。射出装置による溶湯の射出については、例えば図８に示すように、溶湯がキャビティ内に入る直前まで、射出装置の射出速度を低速の低速射出速度として溶湯を射出する低速射出工程Ｓ２０が行われ、次いで射出装置の射出速度を高速の高速射出速度として溶湯を射出する高速射出工程Ｓ４０が行われる（例えば特許文献１）。 Vacuum die casting is a die casting in which the gas in the cavity of the mold is sucked by a vacuum device, the molten metal injected into the sleeve is injected by an injection device, and the cavity is filled through a runner or the like to cast a product. The method. Regarding the injection of the molten metal by the injection device, for example, as shown in FIG. 8, a low-speed injection step S20 for injecting the molten metal with the injection speed of the injection device as a low-speed injection speed is performed until just before the molten metal enters the cavity. Next, a high-speed injection step S40 for injecting the molten metal is performed with the injection speed of the injection device as the high-speed injection speed (for example, Patent Document 1).
特開２０１５－０４７６３１号公報Japanese Unexamined Patent Publication No. 2015-047631
　しかしながら、上記の真空ダイカストは、低速射出速度で射出されてランナー内に流入した溶湯の一部が、真空装置による吸引の影響を受けてキャビティ内およびキャビティ内のガスを吸引するための吸引通路に噴出し、噴出した溶湯が吸引通路等に設けられた真空装置のバルブ等を詰まらせてしまうという問題がある。 However, in the above vacuum die casting, a part of the molten metal injected at a low injection speed and flowing into the runner is affected by the suction by the vacuum device and becomes a suction passage for sucking the gas in the cavity and the cavity. There is a problem that the spouted and spouted molten metal clogs the valve or the like of the vacuum device provided in the suction passage or the like.
　また、上記の真空ダイカストは、ランナーの横断面がスリーブ内の横断面に比べて急激に狭くなるため、低速射出速度で射出される溶湯のランナー内における流速が比較的に速くなり、溶湯にランナー内のガスが巻き込まれてしまう。その結果、上記の真空ダイカストは、製品に鋳巣が生じるなど、製品の品質が低下してしまうという問題もある。 Further, in the above-mentioned vacuum die casting, since the cross section of the runner is sharply narrowed as compared with the cross section in the sleeve, the flow velocity of the molten metal injected at a low injection speed in the runner becomes relatively high, and the runner in the molten metal becomes a runner. The gas inside is caught. As a result, the above-mentioned vacuum die casting has a problem that the quality of the product is deteriorated, such as the formation of cavities in the product.
　そこで本発明は、真空ダイカストにおいて、溶湯による真空装置の詰まりを防止し、品質の高い製品を製造することができるダイカスト方法およびダイカスト装置を提供することを目的とする。あわせて、ダイカスト方法に適した金型を提供することを目的とする。 Therefore, an object of the present invention is to provide a die casting method and a die casting apparatus capable of preventing clogging of the vacuum apparatus due to molten metal and producing a high quality product in the vacuum die casting. At the same time, it is an object of the present invention to provide a mold suitable for the die casting method.
　本発明の一態様のダイカスト方法は、金型のキャビティ内のガスを吸引しながら、スリーブ内の溶湯を射出装置によりランナーを含む溶湯通路を介してキャビティ内に射出するダイカスト方法であって、射出装置が低速である低速射出速度で溶湯を射出する低速射出工程と、射出装置が低速射出速度より遅い超低速射出速度で溶湯を射出する超低速射出工程と、射出装置が、高速である高速射出速度で溶湯を射出する高速射出工程と、を順に備える。 The die casting method of one aspect of the present invention is a die casting method in which the molten metal in the sleeve is injected into the cavity through the molten metal passage including the runner by an injection device while sucking the gas in the cavity of the mold. A low-speed injection process in which the device injects molten metal at a low-speed injection speed, an ultra-low-speed injection process in which the injection device injects molten metal at an ultra-low injection speed slower than the low-speed injection speed, and a high-speed injection in which the injection device is high-speed. A high-speed injection process for injecting molten metal at a high speed is provided in order.
　上記ダイカスト方法において、ランナーの横断面は、その面積が、射出装置の射出速度が超低速射出速度である場合に、ランナー内の溶湯の流速が０．３０ｍ／ｓ～０．６０ｍ／ｓとなるように設定されていることが好ましい。 In the above die casting method, the cross section of the runner has an area where the flow velocity of the molten metal in the runner is 0.30 m / s to 0.60 m / s when the injection speed of the injection device is an ultra-low injection speed. It is preferable that it is set as such.
　上記ダイカスト方法において、超低速射出速度は、０．０３ｍ／ｓ～０．０６ｍ／ｓの範囲の速度であることが好ましい。 In the above die casting method, the ultra-low speed injection speed is preferably a speed in the range of 0.03 m / s to 0.06 m / s.
　上記ダイカスト方法において、ランナーの横断面は、偏平な略台形の形状であることが好ましい。 In the above die casting method, the cross section of the runner is preferably a flat, substantially trapezoidal shape.
　上記ダイカスト方法において、超低速射出工程は、溶湯がキャビティに入る直前まで行われることが好ましい。 In the above die casting method, it is preferable that the ultra-low speed injection step is performed until just before the molten metal enters the cavity.
　上記ダイカスト方法において、低速射出工程は、溶湯が溶湯通路に入る直前まで行われることが好ましい。 In the above die casting method, the low speed injection step is preferably performed until just before the molten metal enters the molten metal passage.
　上記ダイカスト方法において、金型のキャビティ内のガスの吸引は、高速射出工程の間を含んで行われることが好ましい。 In the above die casting method, it is preferable that the suction of the gas in the cavity of the mold is performed during the high-speed injection step.
　本発明の一態様のダイカスト装置は、キャビティを有する金型と、内部に溶湯を収容可能なスリーブと、スリーブ内の溶湯を射出する射出装置と、スリーブ内の溶湯をキャビティに送るための通路であって、ランナーを含む溶湯通路と、キャビティ内のガスを吸引するための通路である吸引通路と、吸引通路に接続し、キャビティ内のガスを吸引する真空装置と、制御部とを備える。制御部は、射出装置の射出速度を低速である低速射出速度とし、次いで、射出装置の射出速度を低速射出速度より遅い超低速射出速度とし、次いで、射出装置の射出速度を高速である高速射出速度とするように射出装置の射出を制御する。 The die casting device of one aspect of the present invention includes a mold having a cavity, a sleeve capable of accommodating the molten metal inside, an injection device for injecting the molten metal in the sleeve, and a passage for sending the molten metal in the sleeve to the cavity. It is provided with a molten metal passage including a runner, a suction passage which is a passage for sucking gas in the cavity, a vacuum device connected to the suction passage and sucking gas in the cavity, and a control unit. The control unit sets the injection speed of the injection device to a low speed injection speed, which is a low speed, then sets the injection speed of the injection device to an ultra-low speed injection speed slower than the low speed injection speed, and then sets the injection speed of the injection device to a high speed injection speed. Control the injection of the injection device so that it is the speed.
　上記ダイカスト装置において、ランナーの横断面は、その面積が、射出装置の射出速度が超低速射出速度である場合に、ランナー内の溶湯の流速が０．３０ｍ／ｓ～０．６０ｍ／ｓとなるように設定されていることが好ましい。 In the above die casting device, the cross section of the runner has an area where the flow velocity of the molten metal in the runner is 0.30 m / s to 0.60 m / s when the injection speed of the injection device is an ultra-low injection speed. It is preferable that it is set as such.
　上記ダイカスト装置において、超低速射出速度は、０．０３ｍ／ｓ～０．０６ｍ／ｓであることが好ましい。 In the above die casting device, the ultra-low speed injection speed is preferably 0.03 m / s to 0.06 m / s.
　上記ダイカスト装置において、超低速射出速度による射出は、溶湯がキャビティに入る直前まで行われることが好ましい。 In the above die casting device, injection at an ultra-low injection speed is preferably performed until just before the molten metal enters the cavity.
　上記ダイカスト装置において、低速射出速度による射出は、溶湯が溶湯通路に入る直前まで行われることが好ましい。 In the above die casting device, injection at a low injection speed is preferably performed until just before the molten metal enters the molten metal passage.
　上記ダイカスト装置において、制御部は、真空装置による吸引を制御してもよい。この場合、制御部は、射出装置の射出速度が高速射出速度である間を含んでキャビティ内のガスを吸引するように真空装置を制御してもよい。 In the above die casting device, the control unit may control suction by the vacuum device. In this case, the control unit may control the vacuum device so as to suck the gas in the cavity including while the injection speed of the injection device is the high injection speed.
　本発明の一態様の金型は、溶湯を射出装置により射出するダイカスト装置に用いられる金型であって、キャビティと、キャビティに溶湯を送るための通路であって、ランナーを含む溶湯通路と、キャビティ内のガスを吸引するための通路である吸引通路と、を備えている。 The mold of one aspect of the present invention is a mold used for a die casting device that injects molten metal by an injection device, and is a cavity, a passage for sending the molten metal to the cavity, and a molten metal passage including a runner. It is provided with a suction passage, which is a passage for sucking gas in the cavity.
　上記金型において、ランナーの横断面は、その面積が、射出装置の射出速度が低速である低速射出速度より遅い超低速射出速度である場合に、ランナー内の溶湯の流速が０．３０ｍ／ｓ～０．６０ｍ／ｓとなるように設定されていることが好ましい。 In the above mold, the cross section of the runner has an ultra-low speed injection speed slower than the low speed injection speed at which the injection speed of the injection device is low, and the flow velocity of the molten metal in the runner is 0.30 m / s. It is preferably set to be about 0.60 m / s.
　上記金型において、超低速射出速度は、０．０３ｍ／ｓ～０．０６ｍ／ｓであることが好ましい。 In the above mold, the ultra-low speed injection speed is preferably 0.03 m / s to 0.06 m / s.
　上記金型において、ランナーの横断面は、偏平な略台形の形状であることが好ましい。 In the above mold, the cross section of the runner is preferably a flat and substantially trapezoidal shape.
　ダイカスト方法およびダイカスト装置によると、真空ダイカストにおいて、溶湯による真空装置の詰まりを防止し、品質の高い製品を製造することができる。また、ダイカスト方法およびダイカスト装置に適した金型を提供することができる。 According to the die casting method and the die casting device, in the vacuum die casting, it is possible to prevent the vacuum device from being clogged by the molten metal and to manufacture a high quality product. Further, it is possible to provide a mold suitable for a die casting method and a die casting apparatus.
本発明の実施形態のダイカスト装置を模式的に示す部分断面図である。It is a partial cross-sectional view which shows typically the die casting apparatus of embodiment of this invention. 図１のＩＩ－ＩＩ線におけるランナーの断面図である。It is sectional drawing of the runner in line II-II of FIG. 本発明の実施形態のダイカスト方法を示すフローチャートである。It is a flowchart which shows the die casting method of embodiment of this invention. 射出装置の射出速度を示すグラフである。It is a graph which shows the injection speed of an injection device. 低速射出工程から超低速射出工程に切り替わる状態を模式的に示す部分断面図である。It is a partial cross-sectional view which shows typically the state of switching from a low-speed injection process to an ultra-low-speed injection process. 超低速射出工程から高速射出工程に切り替わる状態を模式的に示す部分断面図である。It is a partial cross-sectional view which shows typically the state of switching from an ultra-low-speed injection process to a high-speed injection process. 高速射出工程が完了した状態を模式的に示す部分断面図である。It is a partial cross-sectional view which shows typically the state which the high-speed injection process is completed. 従来の真空ダイカストにおける射出装置の射出速度を示すグラフである。It is a graph which shows the injection speed of the injection apparatus in the conventional vacuum die casting.
　以下、本発明の金型、ダイカスト装置およびダイカスト方法の実施形態について図面を用いて説明する。
　ダイカスト装置１は、図１に示すように、金型１０と、スリーブ２０と、射出装置４０と、真空装置５０とを備えている。 Hereinafter, embodiments of the mold, die casting apparatus, and die casting method of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the die casting device 1 includes a mold 10, a sleeve 20, an injection device 40, and a vacuum device 50.
　金型１０は、固定型１１と、可動型１３とを備えている。固定型１１および可動型１３は、例えば鋼等の金属により形成されている。可動型１３は、水平方向（例えば前後方向）に移動可能となっている。可動型１３は、図示しない可動装置により移動し、固定型１１と型締めおよび型開きされる。固定型１１と可動型１３の間には、製品を鋳造するためのキャビティ１５が設けられている。また、固定型１１と可動型１３の間には、キャビティ１５内のガスを吸引するために、キャビティ１５から金型１０の外に通ずる吸引通路１７が設けられている。 The mold 10 includes a fixed mold 11 and a movable mold 13. The fixed mold 11 and the movable mold 13 are made of a metal such as steel. The movable type 13 is movable in the horizontal direction (for example, in the front-rear direction). The movable mold 13 is moved by a movable device (not shown), and is molded and opened with the fixed mold 11. A cavity 15 for casting a product is provided between the fixed mold 11 and the movable mold 13. Further, between the fixed mold 11 and the movable mold 13, a suction passage 17 leading from the cavity 15 to the outside of the mold 10 is provided in order to suck the gas in the cavity 15.
　スリーブ２０は、内部に溶湯を収容可能なものである。スリーブ２０は、円筒状のものであり、鋼等の金属により形成されている。スリーブ２０は、軸を水平方向（例えば前後方向）に平行にした状態で、一端側が金型１０に取り付けられている。スリーブ２０には、内外を貫通する開口である注湯口２２が設けられている。溶湯Ｍは、注湯口２２からスリーブ２０内に注入される。 The sleeve 20 can accommodate the molten metal inside. The sleeve 20 has a cylindrical shape and is made of a metal such as steel. One end of the sleeve 20 is attached to the mold 10 with the shaft parallel to the horizontal direction (for example, the front-rear direction). The sleeve 20 is provided with a pouring port 22 which is an opening that penetrates inside and outside. The molten metal M is injected into the sleeve 20 from the pouring port 22.
　スリーブ２０内とキャビティ１５との間には、スリーブ２０内の溶湯Ｍをキャビティ１５内に送るための通路である溶湯通路３０が設けられている。溶湯通路３０は、スリーブ２０からキャビティ１５に向かって順に、導入路３２と、ランナー３４と、ゲートランナー３６とを備えている。導入路３２は、スリーブ２０内の溶湯Ｍが溶湯通路３０に導入される部分であり、スリーブ２０内に接続している。導入路３２は、スリーブ２０と可動型１３の分流子１９とにより形成されている。ランナー３４およびゲートランナー３６は、固定型１１と可動型１３の間に設けられている。ランナー３４は、導入路３２に接続している。また、ゲートランナー３６はランナー３４とキャビティ１５に接続している。 A molten metal passage 30 which is a passage for sending the molten metal M in the sleeve 20 into the cavity 15 is provided between the inside of the sleeve 20 and the cavity 15. The molten metal passage 30 includes an introduction path 32, a runner 34, and a gate runner 36 in this order from the sleeve 20 toward the cavity 15. The introduction path 32 is a portion where the molten metal M in the sleeve 20 is introduced into the molten metal passage 30, and is connected to the inside of the sleeve 20. The introduction path 32 is formed by a sleeve 20 and a diversion element 19 of a movable type 13. The runner 34 and the gate runner 36 are provided between the fixed mold 11 and the movable mold 13. The runner 34 is connected to the introduction path 32. Further, the gate runner 36 is connected to the runner 34 and the cavity 15.
　射出装置４０は、スリーブ２０内の溶湯Ｍを金型１０のキャビティ１５に射出するための装置である。射出装置４０は、チップ４２と、ロッド４４と、駆動部４６とを備えている。チップ４２は略円柱状のものである。チップ４２は、スリーブ２０内において、スリーブ２０と同軸で進退可能となっている。チップ４２の後面にはロッド４４の先端が連結しており、駆動部４６がロッド４４を進退させることにより、チップ４２がスリーブ２０内で進退する。なお、以下の説明において、チップ４２が前進、言い換えれば金型１０側に移動することを射出または射出装置４０の射出と言うものとし、その速度を射出速度というものとする。 The injection device 40 is a device for injecting the molten metal M in the sleeve 20 into the cavity 15 of the mold 10. The injection device 40 includes a tip 42, a rod 44, and a drive unit 46. The chip 42 has a substantially columnar shape. The tip 42 can move forward and backward coaxially with the sleeve 20 in the sleeve 20. The tip of the rod 44 is connected to the rear surface of the tip 42, and the drive unit 46 advances and retreats the rod 44, so that the tip 42 advances and retreats in the sleeve 20. In the following description, the movement of the tip 42 forward, in other words, to the mold 10 side is referred to as injection or injection of the injection device 40, and the speed is referred to as injection speed.
　スリーブ２０内に注入された溶湯Ｍは、射出装置４０で射出することにより、溶湯通路３０を通ってキャビティ１５内に充填される。 The molten metal M injected into the sleeve 20 is filled into the cavity 15 through the molten metal passage 30 by injecting it with the injection device 40.
　ランナー３４に関して、横断面は、その面積が、射出装置４０（チップ４２）の射出速度を従来の低速射出速度より遅い超低速射出速度とする場合に、ランナー３４内の溶湯Ｍの流速が０．３０ｍ／ｓ～０．６０ｍ／ｓとなるように設定されている。低速射出速度は、例えば０．１５ｍ／ｓ～０．３０ｍ／ｓの範囲の速度である。ランナー３４の横断面の面積は、超低速射出速度が０．０３ｍ／ｓ～０．０６ｍ／ｓの範囲の速度である場合に、ランナー３４内の溶湯Ｍの流速が０．３０ｍ／ｓ～０．６０ｍ／ｓとなるように設定されていることが好ましい。さらに、ランナー３４の横断面の面積は、超低速射出速度が０．０４ｍ／ｓ～０．０５ｍ／ｓの範囲の速度である場合に、ランナー３４内の溶湯Ｍの流速が０．３０ｍ／ｓ～０．６０ｍ／ｓとなるように設定されていることがより好ましい。ランナー３４内の溶湯Ｍの流速は、例えばランナー３４の断面平均流速とすることができる。ランナー３４の横断面の形状は、特に限定されるものではないが、図２に示すように、偏平な台形状とすることが好ましい。ランナー３４の横断面の面積は、例えば下記連続の式（１）より求めることができる。
　Ａ１Ｖ１＝Ａ２Ｖ２　　　　　　　　　（１）
　ここで、Ａ１はチップ４２またはスリーブ２０内の横断面の面積、Ｖ１は射出装置４０の射出速度（スリーブ２０内の溶湯Ｍの流速）、Ａ２はランナー３４の横断面の面積、Ｖ２はランナー３４内の溶湯Ｍの流速である。 With respect to the runner 34, the cross-sectional area shows that the flow velocity of the molten metal M in the runner 34 is 0. It is set to be 30 m / s to 0.60 m / s. The low-speed injection speed is, for example, a speed in the range of 0.15 m / s to 0.30 m / s. The cross-sectional area of the runner 34 is such that the flow velocity of the molten metal M in the runner 34 is 0.30 m / s to 0 when the ultra-low speed injection speed is in the range of 0.03 m / s to 0.06 m / s. It is preferably set to be .60 m / s. Further, the cross-sectional area of the runner 34 is such that the flow velocity of the molten metal M in the runner 34 is 0.30 m / s when the ultra-low speed injection speed is in the range of 0.04 m / s to 0.05 m / s. It is more preferable that the value is set to about 0.60 m / s. The flow velocity of the molten metal M in the runner 34 can be, for example, the average cross-sectional flow velocity of the runner 34. The shape of the cross section of the runner 34 is not particularly limited, but as shown in FIG. 2, it is preferable to have a flat trapezoidal shape. The area of the cross section of the runner 34 can be obtained, for example, from the following continuity equation (1).
A1V1 = A2V2 (1)
Here, A1 is the area of the cross section in the chip 42 or the sleeve 20, V1 is the injection speed of the injection device 40 (the flow velocity of the molten metal M in the sleeve 20), A2 is the area of the cross section of the runner 34, and V2 is the runner 34. It is the flow velocity of the molten metal M in the inside.
　真空装置５０は、金型１０のキャビティ１５内のガスを吸引するためのものである。真空装置５０は、真空駆動部５２と、配管５４と、バルブ５６とを備えている。真空駆動部５２は、配管５４を介して、金型１０の吸引通路１７に接続している。真空駆動部５２は、配管５４および吸引通路１７を介して、金型１０のキャビティ１５内のガスを吸引する。バルブ５６は、キャビティ１５内のガスを吸引するための通路を開閉するためのものである。本実施形態では、バルブ５６は、金型１０の吸引通路１７に設けられており、吸引通路１７を開閉する。真空装置５０は、バルブ５６が吸引通路１７を開いた状態において、キャビティ１５内のガスを吸引可能となり、バルブ５６が吸引通路１７を閉じた状態において、キャビティ１５内のガスを吸引不能となる。 The vacuum device 50 is for sucking the gas in the cavity 15 of the mold 10. The vacuum device 50 includes a vacuum drive unit 52, a pipe 54, and a valve 56. The vacuum drive unit 52 is connected to the suction passage 17 of the mold 10 via the pipe 54. The vacuum drive unit 52 sucks the gas in the cavity 15 of the mold 10 through the pipe 54 and the suction passage 17. The valve 56 is for opening and closing a passage for sucking gas in the cavity 15. In the present embodiment, the valve 56 is provided in the suction passage 17 of the mold 10 to open and close the suction passage 17. The vacuum device 50 can suck the gas in the cavity 15 when the valve 56 opens the suction passage 17, and cannot suck the gas in the cavity 15 when the valve 56 closes the suction passage 17.
　制御部６０は、ダイカスト装置１の各構成の動作を制御するものである。本実施形態では、制御部６０は、ＣＰＵおよびメモリ等の記憶装置等を含むコンピュータにより構成されている。制御部６０は、射出装置４０、可動装置および真空装置５０（バルブ５６および真空駆動部５２）と電気的に接続している。制御部６０は、制御部６０に備えられるプログラムと、制御部６０の入力部により入力される制御情報等とにより、射出装置４０、可動装置および真空装置５０に信号を送信してこれらの動作を制御する。例えば、制御部６０は、射出装置４０の駆動部４６を制御することにより、射出装置４０のチップ４２の移動方向（射出方向）およびその速度を制御する。また、制御部６０は、可動装置を制御して、可動型１３を移動させることにより、金型１０の型締めおよび型開きを制御する。また、制御部６０は、真空装置５０のバルブ５６および真空駆動部５２を制御して、バルブ５６の開閉ならびに真空駆動部５２の駆動および吸引力（減圧の圧力）を制御する。 The control unit 60 controls the operation of each configuration of the die casting device 1. In the present embodiment, the control unit 60 is composed of a computer including a CPU, a storage device such as a memory, and the like. The control unit 60 is electrically connected to the injection device 40, the movable device, and the vacuum device 50 (valve 56 and vacuum drive unit 52). The control unit 60 transmits signals to the injection device 40, the movable device, and the vacuum device 50 by the program provided in the control unit 60 and the control information input by the input unit of the control unit 60 to perform these operations. Control. For example, the control unit 60 controls the moving direction (injection direction) of the chip 42 of the injection device 40 and its speed by controlling the drive unit 46 of the injection device 40. Further, the control unit 60 controls the movable device and moves the movable mold 13 to control the mold clamping and the mold opening of the mold 10. Further, the control unit 60 controls the valve 56 and the vacuum drive unit 52 of the vacuum device 50 to control the opening and closing of the valve 56 and the drive and suction force (decompression pressure) of the vacuum drive unit 52.
　次に、上記ダイカスト装置１によるダイカスト方法の実施形態について説明する。ダイカスト方法は、図３に示すように、射出前工程Ｓ１０と、低速射出工程Ｓ２０と、超低速射出工程Ｓ３０と、高速射出工程Ｓ４０と、真空工程Ｓ５０と、射出後工程Ｓ６０とを備えている。 Next, an embodiment of the die casting method using the die casting device 1 will be described. As shown in FIG. 3, the die casting method includes a pre-injection process S10, a low-speed injection process S20, an ultra-low-speed injection process S30, a high-speed injection process S40, a vacuum process S50, and a post-injection process S60. ..
　射出前工程Ｓ１０では、固定型１１と可動型１３とを型締めする。また、スリーブ２０の注湯口２２から溶湯Ｍをスリーブ２０内に注入する。溶湯Ｍは、例えばアルミニウム等の金属材料の溶湯Ｍである。 In the pre-injection process S10, the fixed mold 11 and the movable mold 13 are molded. Further, the molten metal M is injected into the sleeve 20 from the pouring port 22 of the sleeve 20. The molten metal M is a molten metal M of a metal material such as aluminum.
　次いで、射出装置４０により溶湯Ｍの射出を行う。射出装置４０による溶湯Ｍの射出は、図３および図４に示すように、低速射出工程Ｓ２０、超低速射出工程Ｓ３０および高速射出工程Ｓ４０の順に行われる。 Next, the molten metal M is injected by the injection device 40. As shown in FIGS. 3 and 4, the injection of the molten metal M by the injection device 40 is performed in the order of the low-speed injection step S20, the ultra-low-speed injection step S30, and the high-speed injection step S40.
　低速射出工程Ｓ２０では、射出装置４０が、停止した状態から低速の低速射出速度に移行する移行段階を経て、一定の低速射出速度で溶湯Ｍを射出する。低速射出速度は、例えば０．１５ｍ／ｓ～０．３０ｍ／ｓの範囲の速度である。低速射出工程Ｓ２０は、図５に示すように、溶湯Ｍが溶湯通路３０（導入路３２）に入る直前まで行われる。 In the low-speed injection step S20, the injection device 40 injects the molten metal M at a constant low-speed injection speed through a transition stage in which the injection device 40 shifts from a stopped state to a low-speed low-speed injection speed. The low-speed injection speed is, for example, a speed in the range of 0.15 m / s to 0.30 m / s. As shown in FIG. 5, the low-speed injection step S20 is performed until just before the molten metal M enters the molten metal passage 30 (introduction path 32).
　超低速射出工程Ｓ３０では、射出装置４０が、低速射出速度から超低速射出速度に移行する移行段階を経て、一定の超低速射出速度で溶湯Ｍを射出する。超低速射出速度は、低速射出速度より遅いまたは十分に遅い速度である。超低速射出速度は、例えば０．０３ｍ／ｓ～０．０６ｍ／ｓの範囲の速度であることが好ましく、０．０４ｍ／ｓ～０．０５ｍ／ｓの範囲の速度であるとより好ましい。超低速射出工程Ｓ３０は、図５および図６に示すように、溶湯Ｍが溶湯通路３０（導入路３２）に入る直前から、キャビティ１５に入る直前、例えばゲートランナー３６またはゲート（ゲートランナー３６とキャビティ１５との境界）に入る直前まで行う。超低速射出工程Ｓ３０において、ランナー３４内の溶湯Ｍの流速（例えば断面平均流速）は、理論的に０．３０ｍ／ｓ～０．６０ｍ／ｓの範囲の流速となる。 In the ultra-low speed injection step S30, the injection device 40 injects the molten metal M at a constant ultra-low injection speed through a transition step of shifting from the low speed injection speed to the ultra low speed injection speed. The ultra-slow injection speed is slower than or sufficiently slower than the slow injection speed. The ultra-low injection speed is preferably, for example, a speed in the range of 0.03 m / s to 0.06 m / s, and more preferably a speed in the range of 0.04 m / s to 0.05 m / s. In the ultra-low speed injection step S30, as shown in FIGS. 5 and 6, immediately before the molten metal M enters the molten metal passage 30 (introduction path 32) and immediately before entering the cavity 15, for example, the gate runner 36 or the gate (with the gate runner 36). This is done until just before entering the boundary with the cavity 15. In the ultra-low speed injection step S30, the flow velocity of the molten metal M in the runner 34 (for example, the average cross-sectional flow velocity) is theoretically in the range of 0.30 m / s to 0.60 m / s.
　高速速射出工程では、射出装置４０が、超低速射出速度から高速射出速度に移行する移行段階を経て、一定の高速射出速度で溶湯Ｍを射出し、次いで速度を減速しながら射出を停止する。高速射出速度は、低速射出速度より速いまたは十分に速い速度である。高速射出速度は、例えば２．００ｍ／ｓ～８．００ｍ／ｓの範囲の速度である。高速射出工程Ｓ４０は、図６および図７に示すように、溶湯Ｍがキャビティ１５に入る直前、例えばゲートランナー３６またはゲートに入る直前から、溶湯Ｍが十分にキャビティ１５に充填されるまで行う。 In the high-speed high-speed injection process, the injection device 40 injects the molten metal M at a constant high-speed injection speed through a transition stage of shifting from the ultra-low-speed injection speed to the high-speed injection speed, and then stops the injection while decelerating the speed. The fast injection speed is faster than or sufficiently faster than the slow injection speed. The high-speed injection speed is, for example, a speed in the range of 2.00 m / s to 8.00 m / s. As shown in FIGS. 6 and 7, the high-speed injection step S40 is performed immediately before the molten metal M enters the cavity 15, for example, immediately before entering the gate runner 36 or the gate, until the molten metal M is sufficiently filled in the cavity 15.
　上記射出装置４０による溶湯Ｍの射出においては、図３および図４に示すように、真空工程Ｓ５０も併せて行う。真空工程Ｓ５０では、真空装置５０によりキャビティ１５内のガスを吸引する。真空工程Ｓ５０では、キャビティ１５内の圧力が、例えば－１０ｋｐａ以上となるようにキャビティ１５内のガスを吸引する。真空工程Ｓ５０は、高速射出工程Ｓ４０の間を含んで行われる。例えば、真空工程Ｓ５０は、低速射出工程Ｓ２０において開始し、高速射出工程Ｓ４０の後に終了する。真空工程Ｓ５０の開始は、例えば、高速射出工程Ｓ４０の０．４ｓ～０．６ｓ前とすることができる。 In the injection of the molten metal M by the injection device 40, as shown in FIGS. 3 and 4, the vacuum step S50 is also performed. In the vacuum step S50, the gas in the cavity 15 is sucked by the vacuum device 50. In the vacuum step S50, the gas in the cavity 15 is sucked so that the pressure in the cavity 15 becomes, for example, −10 kpa or more. The vacuum step S50 is performed including during the high-speed injection step S40. For example, the vacuum step S50 starts in the low speed injection step S20 and ends after the high speed injection step S40. The vacuum step S50 can be started, for example, 0.4s to 0.6s before the high-speed injection step S40.
　高速射出工程Ｓ４０および真空工程Ｓ５０が完了した後、射出後工程Ｓ６０を行う。射出後工程Ｓ６０では、固定型１１と可動型１３とを型開きし、鋳造された製品を取り出す。 After the high-speed injection step S40 and the vacuum step S50 are completed, the post-injection step S60 is performed. In the post-injection step S60, the fixed mold 11 and the movable mold 13 are opened, and the cast product is taken out.
　ダイカスト方法およびダイカスト装置１によると、真空ダイカストにおいて、低速射出工程Ｓ２０、超低速射出工程Ｓ３０および高速射出工程Ｓ４０の順で射出装置４０により溶湯Ｍを射出することにより、キャビティ１５への溶湯Ｍの噴出が抑えられるので、バルブ５６等の真空装置５０の溶湯Ｍによる詰まりを防止することができる。また、これにより、ダイカスト方法およびダイカスト装置１は、射出装置４０による溶湯Ｍの射出において、溶湯通路３０内における溶湯Ｍへのガスの巻き込みを低減できるので、品質の高い製品を製造することができる。 According to the die casting method and the die casting device 1, in the vacuum die casting, the molten metal M is injected into the cavity 15 by the injection device 40 in the order of the low speed injection step S20, the ultra-low speed injection step S30, and the high speed injection step S40. Since the ejection is suppressed, clogging of the vacuum device 50 such as the valve 56 due to the molten metal M can be prevented. Further, as a result, the die casting method and the die casting device 1 can reduce the entrainment of gas in the molten metal M in the molten metal passage 30 when the molten metal M is injected by the injection device 40, so that a high quality product can be manufactured. ..
　ダイカスト方法およびダイカスト装置１によると、ランナー３４の横断面は、その面積が、射出装置４０の射出速度が超低速射出速度である場合に、ランナー３４内の溶湯Ｍの流速が０．３０ｍ／ｓ～０．６０ｍ／ｓとなるように設定されていることにより、より一層、真空装置５０の詰まりが防止されるとともに、品質の高い製品を製造することができる。 According to the die casting method and the die casting device 1, the cross section of the runner 34 has a flow velocity of the molten metal M in the runner 34 of 0.30 m / s when the injection speed of the injection device 40 is an ultra-low injection speed. By setting the flow velocity to about 0.60 m / s, clogging of the vacuum apparatus 50 can be further prevented, and a high-quality product can be manufactured.
　また、ダイカスト方法およびダイカスト装置１によると、超低速射出工程Ｓ３０において、超低速射出速度を０．０３ｍ／ｓ～０．０６ｍ／ｓとすることにより、より一層、真空装置５０の詰まりが防止されるとともに、品質の高い製品を製造することができる。また、これにより、ダイカスト方法およびダイカスト装置１は、低速射出速度でランナー３４内における溶湯Ｍの流速を０．３０ｍ／ｓ～０．６０ｍ／ｓにしようとする場合に比べ、ランナー３４の横断面の面積を小さくすることができるので、ランナー３４内の溶湯Ｍの凝固時間が短くなって製品の製造時間を短縮することができ、鋳造歩留りも向上させることができる。 Further, according to the die casting method and the die casting device 1, in the ultra-low speed injection step S30, by setting the ultra low speed injection speed to 0.03 m / s to 0.06 m / s, clogging of the vacuum device 50 is further prevented. At the same time, it is possible to manufacture high quality products. Further, as a result, the die casting method and the die casting device 1 have a cross section of the runner 34 as compared with the case where the flow velocity of the molten metal M in the runner 34 is set to 0.30 m / s to 0.60 m / s at a low injection speed. Since the area of the molten metal M in the runner 34 can be reduced, the solidification time of the molten metal M in the runner 34 can be shortened, the manufacturing time of the product can be shortened, and the casting yield can be improved.
　また、ダイカスト方法およびダイカスト装置１によると、ランナー３４の横断面を偏平である略台形の形状とすることにより、より一層、真空装置５０の詰まりが防止されるとともに、品質の高い製品を製造することができる。 Further, according to the die casting method and the die casting device 1, by making the cross section of the runner 34 a substantially trapezoidal shape that is flat, clogging of the vacuum device 50 is further prevented and a high quality product is manufactured. be able to.
　また、ダイカスト方法およびダイカスト装置１によると、超低速射出工程Ｓ３０を溶湯Ｍがキャビティ１５に入る直前まで行うことにより、より一層、真空装置５０の詰まりが防止されるとともに、品質の高い製品を製造することができる。 Further, according to the die casting method and the die casting device 1, by performing the ultra-low speed injection step S30 until just before the molten metal M enters the cavity 15, clogging of the vacuum device 50 is further prevented and a high quality product is manufactured. can do.
　また、ダイカスト方法およびダイカスト装置１によると、低速射出工程Ｓ２０を溶湯Ｍが溶湯通路３０に入る直前まで行うことにより、低速射出速度で溶湯Ｍを射出する時間を比較的に長くすることができるので、溶湯Ｍがキャビティ１５に充填される前に溶湯Ｍが凝固することを防止でき、さらに製品の製造時間を短縮することができる。 Further, according to the die casting method and the die casting apparatus 1, by performing the low-speed injection step S20 until just before the molten metal M enters the molten metal passage 30, the time for injecting the molten metal M at a low injection speed can be relatively long. It is possible to prevent the molten metal M from solidifying before the molten metal M is filled in the cavity 15, and further shorten the manufacturing time of the product.
　金型１０によると、ダイカスト方法およびダイカスト装置１に適した金型を提供することができる。 According to the mold 10, it is possible to provide a mold suitable for the die casting method and the die casting device 1.
　本発明は、上記実施形態に特に限定されるものではなく、本発明の要旨の範囲内において適宜変更することができる。 The present invention is not particularly limited to the above embodiment, and can be appropriately modified within the scope of the gist of the present invention.
　　１　　ダイカスト装置
　　１０　　金型
　　１１　　固定型
　　１３　　可動型
　　１５　　キャビティ
　　１７　　吸引通路
　　１９　　分流子
　　２０　　スリーブ
　　２２　　注湯口
　　３０　　溶湯通路
　　３２　　導入路
　　３４　　ランナー
　　３６　　ゲートランナー
　　４０　　射出装置
　　４２　　チップ
　　４４　　ロッド
　　４６　　駆動部
　　５０　　真空装置
　　５２　　真空駆動部
　　５４　　配管
　　５６　　バルブ
　　６０　　制御部
　　Ｍ　　溶湯
　　Ｓ１０　　射出前工程
　　Ｓ２０　　低速射出工程
　　Ｓ３０　　超低速射出工程
　　Ｓ４０　　高速射出工程
　　Ｓ５０　　真空工程
　　Ｓ６０　　射出後工程
  1 Die-casting device 10 Mold 11 Fixed type 13 Movable type 15 Cavity 17 Suction passage 19 Divider 20 Sleeve 22 Pouring port 30 Molten water passage 32 Introductory path 34 Runner 36 Gate runner 40 Injection device 42 Chip 44 Rod 46 Drive unit 50 Vacuum device 52 Vacuum drive unit 54 Piping 56 Valve 60 Control unit M Molten metal S10 Pre-injection process S20 Low-speed injection process S30 Ultra-low-speed injection process S40 High-speed injection process S50 Vacuum process S60 Post-injection process

Claims (11)

  1. 　金型のキャビティ内のガスを吸引しながら、スリーブ内の溶湯を射出装置によりランナーを含む溶湯通路を介して前記キャビティ内に射出するダイカスト方法であって、
    　前記射出装置が低速である低速射出速度で前記溶湯を射出する低速射出工程と、
    　前記射出装置が前記低速射出速度より遅い超低速射出速度で前記溶湯を射出する超低速射出工程と、
    　前記射出装置が、高速である高速射出速度で前記溶湯を射出する高速射出工程と、
    を順に備える、ダイカスト方法。     This is a die casting method in which the molten metal in the sleeve is injected into the cavity through the molten metal passage including the runner by an injection device while sucking the gas in the cavity of the mold.
    A low-speed injection process in which the molten metal is injected at a low injection speed at which the injection device is low,
    An ultra-low speed injection step in which the injection device injects the molten metal at an ultra-low injection speed slower than the low speed injection speed.
    A high-speed injection process in which the injection device injects the molten metal at a high-speed injection speed, which is a high speed.
    A die-casting method that prepares in order.
  2. 　前記ランナーの横断面は、その面積が、前記射出装置の射出速度が前記超低速射出速度である場合に、前記ランナー内の前記溶湯の流速が０．３０ｍ／ｓ～０．６０ｍ／ｓとなるように設定されている、請求項１記載のダイカスト方法。 The cross section of the runner has an area where the flow velocity of the molten metal in the runner is 0.30 m / s to 0.60 m / s when the injection speed of the injection device is the ultra-low injection speed. The die casting method according to claim 1, which is set to be.
  3. 　前記超低速射出速度は、０．０３ｍ／ｓ～０．０６ｍ／ｓである、請求項１または２記載のダイカスト方法。 The die casting method according to claim 1 or 2, wherein the ultra-low speed injection speed is 0.03 m / s to 0.06 m / s.
  4. 　前記ランナーの横断面は、偏平な略台形の形状である、請求項１～３のいずれか１項に記載のダイカスト方法。 The die casting method according to any one of claims 1 to 3, wherein the cross section of the runner has a flat, substantially trapezoidal shape.
  5. 　キャビティを有する金型と、
    　内部に溶湯を収容可能なスリーブと、
    　前記スリーブ内の前記溶湯を射出する射出装置と、
    　前記スリーブ内の前記溶湯を前記キャビティ内に送るための通路であって、ランナーを含む溶湯通路と、
    　前記キャビティ内のガスを吸引するための通路である吸引通路と、
    　前記吸引通路に接続し、前記キャビティ内のガスを吸引する真空装置と、
    　制御部と、
    を備え、
    　前記制御部は、前記射出装置の射出速度を低速である低速射出速度とし、次いで、前記射出装置の射出速度を前記低速射出速度より遅い超低速射出速度とし、次いで、前記射出装置の射出速度を高速である高速射出速度とするように前記射出装置を制御する、ダイカスト装置。     A mold with a cavity and
    With a sleeve that can store molten metal inside
    An injection device that injects the molten metal in the sleeve, and
    A passage for sending the molten metal in the sleeve into the cavity, and a molten metal passage including a runner.
    A suction passage, which is a passage for sucking gas in the cavity,
    A vacuum device that connects to the suction passage and sucks the gas in the cavity,
    Control unit and
    With
    The control unit sets the injection speed of the injection device to a low-speed injection speed, which is a low speed, then sets the injection speed of the injection device to an ultra-low injection speed slower than the low-speed injection speed, and then sets the injection speed of the injection device to an ultra-low speed. A die casting device that controls the injection device so as to have a high injection speed, which is a high speed.
  6. 　前記ランナーの横断面は、その面積が、前記射出装置の射出速度が超低速射出速度である場合に、前記ランナー内の前記溶湯の流速が０．３０ｍ／ｓ～０．６０ｍ／ｓとなるように設定されている、請求項５記載のダイカスト装置。 The cross section of the runner has an area such that the flow velocity of the molten metal in the runner is 0.30 m / s to 0.60 m / s when the injection speed of the injection device is an ultra-low injection speed. The die casting device according to claim 5, which is set to.
  7. 　前記超低速射出速度は、０．０３ｍ／ｓ～０．０６ｍ／ｓである、請求項５または６記載のダイカスト装置。 The die casting device according to claim 5 or 6, wherein the ultra-low speed injection speed is 0.03 m / s to 0.06 m / s.
  8. 　前記ランナーの横断面は、偏平な略台形の形状である、請求項５～７のいずれか１項に記載のダイカスト装置。 The die casting device according to any one of claims 5 to 7, wherein the cross section of the runner has a flat, substantially trapezoidal shape.
  9. 　溶湯を射出装置により射出するダイカスト装置に用いられる金型であって、
    　キャビティと、
    　前記キャビティに前記溶湯を送るための通路であって、ランナーを含む溶湯通路と、
    　前記キャビティ内のガスを吸引するための通路である吸引通路と、
    を備え、
    　前記ランナーの横断面は、その面積が、前記射出装置の射出速度が低速である低速射出速度より遅い超低速射出速度である場合に、前記ランナー内の前記溶湯の流速が０．３０ｍ／ｓ～０．６０ｍ／ｓとなるように設定されている、金型。     A mold used in a die casting device that injects molten metal with an injection device.
    Cavity and
    A passage for sending the molten metal to the cavity, including a molten metal passage including a runner, and
    A suction passage, which is a passage for sucking gas in the cavity,
    With
    The cross section of the runner has an ultra-low injection speed whose area is slower than the low-speed injection speed at which the injection speed of the injection device is low, and the flow velocity of the molten metal in the runner is 0.30 m / s or more. A mold set to be 0.60 m / s.
  10. 　前記超低速射出速度は、０．０３ｍ／ｓ～０．０６ｍ／ｓである、請求項９記載の金型。 The mold according to claim 9, wherein the ultra-low speed injection speed is 0.03 m / s to 0.06 m / s.
  11. 　前記ランナーの横断面は、偏平な略台形の形状である、請求項９または１０記載の金型。 The mold according to claim 9 or 10, wherein the cross section of the runner has a flat, substantially trapezoidal shape.
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