JP2007175723A

JP2007175723A - Rheocast casting method

Info

Publication number: JP2007175723A
Application number: JP2005374837A
Authority: JP
Inventors: Norihiro Ogawa; 則大小川; Hideki Iwase; 英樹岩瀬; Toshiyuki Sakazawa; 敏行坂澤; Shunzo Aoyama; 俊三青山
Original assignee: Ahresty Corp
Current assignee: Ahresty Corp
Priority date: 2005-12-27
Filing date: 2005-12-27
Publication date: 2007-07-12

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rheocast casting method, in which the outer peripheral part of a slurry-preparing vessel is worked so as to make the vessel easily crushable in an axial direction. <P>SOLUTION: The rheocast casting method comprises: a step of pouring molten metal into a slurry-preparing vessel 7 held by a cooling holder 21; a step of preparing metal slurry in a semi-solidified state by cooling; a step of setting the vessel 7 containing the metal slurry to a pressurizing sleeve of a casting machine; and a step of press-molding the slurry-preparing vessel 7 with a plunger. In the casting method, an uneven pattern 31 to be pressed against the outer peripheral part of the slurry-preparing vessel 7 is formed on the inner peripheral part of the cooling holder 21, and the uneven pattern 31 is transferred to the outer peripheral part of the slurry-preparing vessel during the step of pouring molten metal into the slurry-preparing vessel 7. In the step of press-molding with the plunger, an uneven pattern 12 transferred on the outer peripheral part of the slurry-preparing vessel helps the vessel 7 to be easily crushed in the axial direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ダイカスト機等の高圧鋳造機を用いた成形法のうち、金属の半溶融加工法の１つであるレオキャスト鋳造法（半凝固成形法とも称される。）に関するものである。
ちなみに、レオキャスト鋳造法とは、溶融金属を固液共存域まで冷却して半凝固状態となし（これを金属スラリーと称する。）、この金属スラリーを鋳造機の加圧スリーブに装填しプランジャチップで加圧して成形（鋳造）する鋳造法をいう。 The present invention relates to a rheocast casting method (also referred to as semi-solid forming method) which is one of metal semi-melt processing methods among forming methods using a high-pressure casting machine such as a die casting machine.
By the way, in the rheocast casting method, the molten metal is cooled to a solid-liquid coexistence region to be in a semi-solid state (this is referred to as a metal slurry). This is a casting method in which pressure is applied to form (cast).

従来のレオキャスト鋳造法では、通常、レオメーカーで作製された金属スラリーを使用している。しかしこの方法では、溶融金属を半凝固状態とした後に成形量を分離・定量するので、金属スラリーの定量が難しく、それ故に、金属スラリーの供給量にばらつきが生じやすく、成形した製品の品質が安定しない。
しかも、作製された金属スラリーは形状が不定形であるので、鋳造機の加圧スリーブ中に装填すること自体が難しく、鋳造機の加圧スリーブ中に金属スラリーを安定して供給することが困難であると共に、レオメーカー中で作製された金属スラリーを鋳造機の加圧スリーブに装填するまでの温度コントロールが難しいという問題もあった。 In a conventional rheocast casting method, a metal slurry produced by a rheomaker is usually used. However, in this method, the amount of molding is separated and quantified after the molten metal is in a semi-solid state, so it is difficult to determine the amount of metal slurry. Not stable.
Moreover, since the produced metal slurry has an indefinite shape, it is difficult to load the metal slurry into the pressure sleeve of the casting machine, and it is difficult to stably supply the metal slurry into the pressure sleeve of the casting machine. In addition, there is a problem that it is difficult to control the temperature until the metal slurry produced in the rheo maker is loaded into the pressure sleeve of the casting machine.

そこで上述した課題を解決するべく、溶融金属を一旦スラリー作製容器に注入し、スラリー作製容器内に注入した溶融金属が所定の半凝固状態になったら金属スラリーをそのままスラリー作製容器ごと鋳造機の加圧スリーブ内に装填して加圧成形するようにした新規なレオキャスト鋳造法が提案された（例えば、特許文献１参照。）。 Therefore, in order to solve the above-described problems, the molten metal is once poured into the slurry preparation container, and when the molten metal injected into the slurry preparation container becomes a predetermined semi-solid state, the metal slurry is directly added to the slurry preparation container together with the casting machine. There has been proposed a new rheocast casting method in which a pressure sleeve is loaded and press-molded (see, for example, Patent Document 1).

また、金属スラリーを収容したスラリー作製容器を水平状に配設された加圧スリーブのスラリー供給口から装填して加圧成形する横射出方式のレオキャスト鋳造機において、金属スラリーを収容したスラリー作製容器を加圧スリーブ内に装填してプランジャーで加圧した際に、スラリー作製容器が軸方向にほぼ均一に潰れるように細工を施すことが先に本願出願人によって提案された（特許文献２参照。）。
しかし、この先の提案では、スラリー作製容器を軸方向にほぼ均一に潰れやすくするために、鋳造工程とは別の工程でもってスラリー作製容器の外周部等に細工を施していたので、スラリー作製容器自体の製作コストが高くなってしまう不具合があった。 In addition, in a horizontal injection type rheocast casting machine in which a slurry preparation container containing a metal slurry is loaded from a slurry supply port of a pressurization sleeve arranged in a horizontal manner and pressed, a slurry preparation containing a metal slurry is prepared. It was previously proposed by the applicant of the present application that the slurry preparation container is crushed almost uniformly in the axial direction when the container is loaded into a pressure sleeve and pressurized with a plunger (Patent Document 2). reference.).
However, in the previous proposal, in order to easily crush the slurry preparation container almost uniformly in the axial direction, the outer periphery of the slurry preparation container is crafted in a process separate from the casting process. There was a problem that the production cost of itself increased.

特開平１１−１３８２４８号公報JP-A-11-138248 特開２００２−３６１３８９公報JP 2002-361389 A

本発明はこのような従来の不具合に鑑みてなされたものであり、スラリー作製容器を鋳造機の加圧スリーブに装填し加圧するまでの間、すなわちスラリー作製容器内に溶融金属を注ぎ入れて当該スラリー作製容器内で半凝固状態の金属スラリーを作製し鋳造機の加圧スリーブに装填し加圧するまでの工程中に、スラリー作製容器の外周部に当該スラリー作製容器を軸方向に潰れやすくするための細工を施すことが可能なレオキャスト鋳造法を提供せんとするものである。 The present invention has been made in view of the above-described conventional problems, and the molten metal is poured into the slurry preparation container until the slurry preparation container is loaded into the pressure sleeve of the casting machine and pressurized, that is, the present invention. In order to make the slurry preparation container easily crushed in the axial direction on the outer periphery of the slurry preparation container during the process of preparing a semi-solid metal slurry in the slurry preparation container, loading it into the pressure sleeve of the casting machine and pressurizing it. It is intended to provide a rheocast casting method that can be crafted.

斯かる目的を達成する本発明の請求項１に記載のレオキャスト鋳造法は、冷却ホルダーで保持されたスラリー作製容器内に溶融金属を注ぎ入れる工程と、その後当該スラリー作製容器を冷却して半凝固状態の金属スラリーを作製する工程と、その後金属スラリーを収容したままスラリー作製容器ごと鋳造機の加圧スリーブに装填する工程と、該スラリー作製容器をプランジャーで加圧成形する工程とからなるレオキャスト鋳造法において、前記冷却ホルダーの内周面に、前記スラリー作製容器の外周部に接する凹凸模様を形成し、当該スラリー作製容器内に溶融金属を注ぎ入れる工程中に上記凹凸模様をスラリー作製容器の外周部に転写せしめ、スラリー作製容器の外周部に転写された凹凸模様によりプランジャーで加圧成形する工程において当該スラリー作製容器を軸方向に細かく潰れやすくしたことを特徴としたものである。これにより、半凝固状態の金属スラリーが収容されたスラリー作成容器が軸方向に細かくスムーズに潰され、もって、半凝固状態の金属スラリーを金型キャビティ中にスムーズに充満させることができるようになる。
また、本発明の請求項２に記載のレオキャスト鋳造法は、前記スラリー作製容器を冷却して半凝固状態の金属スラリーを作製する工程中に、当該スラリー作製容器の外周部に凹凸模様を打刻せしめ、該凹凸模様によりプランジャーで加圧成形する工程において当該スラリー作製容器を軸方向に細かく潰れやすくしたことを特徴としたものである。これにより、半凝固状態の金属スラリーが収容されたスラリー作成容器が軸方向に細かくスムーズに潰され、もって、半凝固状態の金属スラリーを金型キャビティ中にスムーズに充満させることができるようになる。
前記冷却ホルダーの内周面に形成される凹凸模様としては、連続又は不連続な直線或いは曲線形状をした断面が略山形をしている突条が前記スラリー作製容器の軸方向に一定間隔で形成されたもの等を挙げることが出来る。
また、本発明の請求項３に記載のレオキャスト鋳造法は、半凝固状態の金属スラリーを収容したスラリー作製容器を鋳造機の加圧スリーブへ搬送し装填するための搬送用ホルダーの内周面に、前記スラリー作製容器の外周部に接する凹凸模様を形成し、該搬送用ホルダーでスラリー作製容器を鋳造機の加圧スリーブへ装填する工程で上記凹凸模様をスラリー作製容器の外周部に転写せしめ、該転写された凹凸模様によりプランジャーで加圧成形する工程において当該スラリー作製容器を軸方向に細かく潰れやすくしたことを特徴としたものである。これにより、半凝固状態の金属スラリーが収容されたスラリー作成容器が軸方向に細かくスムーズに潰され、もって、半凝固状態の金属スラリーを金型キャビティ中にスムーズに充満させることができるようになる。
この場合も、前記搬送用ホルダーの内周面に形成される凹凸模様は、冷却ホルダーの場合と同様に、連続又は不連続な直線或いは曲線形状をした断面が略山形をしている突条が前記スラリー作製容器の軸方向に一定間隔で形成されたもの等を挙げることが出来る。
更に、本発明の請求項４に記載のレオキャスト鋳造法は、前記スラリー作製容器の外周部又は前記加圧スリーブ内に、スラリー作製容器の外周部と接する凹凸転写部材を設け、前記スラリー作製容器を前記プランジャーで加圧成形する工程で、前記スラリー作製容器が前記プランジャーの加圧により分流子との間で前記スリーブ内周方向に押し広げられ、その結果、上記凹凸転写部材の凹凸模様がスラリー作製容器の外周部に転写され、該転写された凹凸模様によりプランジャーで加圧成形する工程において当該スラリー作製容器を軸方向に細かく潰れやすくしたことを特徴としたものである。これにより、半凝固状態の金属スラリーが収容されたスラリー作成容器が軸方向に細かくスムーズに潰され、もって、半凝固状態の金属スラリーを金型キャビティ中にスムーズに充満させることができるようになる。
ここで、前記凹凸転写部材としては、金属コイルや、紐状の金属又は帯状の金属又は断熱材を筒形状又は半円筒形状に編んで作成された等を挙げることが出来る（請求項５）。
また、前記スラリー作製容器の外周部に転写される凹凸模様としては、連続又は不連続な直線或いは曲線形状で前記スラリー作製容器の軸方向に一定間隔に形成されているものが好ましい（請求項６）。 The rheocast casting method according to claim 1 of the present invention that achieves such an object includes a step of pouring molten metal into a slurry preparation container held by a cooling holder, and then the slurry preparation container is cooled to halfway. It comprises a step of producing a solidified metal slurry, a step of loading the slurry preparation vessel together with the slurry preparation vessel into a pressure sleeve of the casting machine while containing the metal slurry, and a step of press-forming the slurry preparation vessel with a plunger. In the rheocast casting method, a concavo-convex pattern in contact with the outer peripheral portion of the slurry preparation container is formed on the inner peripheral surface of the cooling holder, and the concavo-convex pattern is prepared as a slurry during the process of pouring molten metal into the slurry preparation container. In the process of pressure molding with a plunger using the concavo-convex pattern transferred to the outer periphery of the slurry preparation container and transferred to the outer periphery of the container It is obtained by characterized in that the said slurry prepared container easily finely crushed in the axial direction. As a result, the slurry preparation container in which the semi-solid metal slurry is accommodated is finely and smoothly crushed in the axial direction, so that the semi-solid metal slurry can be smoothly filled in the mold cavity. .
Further, in the rheocast casting method according to claim 2 of the present invention, during the step of cooling the slurry preparation container to prepare a semi-solid metal slurry, an uneven pattern is formed on the outer periphery of the slurry preparation container. It is characterized in that the slurry preparation container is easily crushed in the axial direction in the step of slicing and pressure forming with the plunger by the uneven pattern. As a result, the slurry preparation container in which the semi-solid metal slurry is accommodated is finely and smoothly crushed in the axial direction, so that the semi-solid metal slurry can be smoothly filled in the mold cavity. .
As the concavo-convex pattern formed on the inner peripheral surface of the cooling holder, protrusions having a continuous or discontinuous straight or curved cross section having a substantially mountain shape are formed at regular intervals in the axial direction of the slurry preparation container. Can be mentioned.
According to a third aspect of the present invention, there is provided a rheocast casting method in which an inner peripheral surface of a transport holder for transporting and loading a slurry preparation container containing a semi-solid metal slurry to a pressure sleeve of a casting machine. Forming a concavo-convex pattern in contact with the outer periphery of the slurry preparation container, and transferring the concavo-convex pattern to the outer periphery of the slurry preparation container in a process of loading the slurry preparation container into the pressure sleeve of the casting machine with the conveyance holder. The slurry preparation container is easily crushed in the axial direction in the step of pressure molding with a plunger by the transferred concavo-convex pattern. As a result, the slurry preparation container in which the semi-solid state metal slurry is accommodated is finely and smoothly crushed in the axial direction, so that the metal cavity in the semi-solid state can be smoothly filled in the mold cavity. .
Also in this case, the concavo-convex pattern formed on the inner peripheral surface of the transport holder is a ridge that has a continuous or discontinuous straight or curved cross section substantially in the shape of a mountain, as in the case of the cooling holder. Examples include those formed at regular intervals in the axial direction of the slurry preparation container.
Furthermore, in the rheocast casting method according to claim 4 of the present invention, an uneven transfer member in contact with the outer peripheral part of the slurry preparation container is provided in the outer peripheral part of the slurry preparation container or the pressure sleeve, and the slurry preparation container is provided. In the step of pressure-molding the plunger, the slurry preparation container is expanded in the sleeve inner circumferential direction by pressing the plunger in the sleeve inner circumferential direction. As a result, the concave-convex pattern of the concave-convex transfer member Is transferred to the outer peripheral portion of the slurry preparation container, and the slurry preparation container is easily crushed in the axial direction in the step of pressure forming with the plunger by the transferred concavo-convex pattern. As a result, the slurry preparation container in which the semi-solid state metal slurry is accommodated is finely and smoothly crushed in the axial direction, so that the metal cavity in the semi-solid state can be smoothly filled in the mold cavity. .
Here, examples of the concavo-convex transfer member include a metal coil, a string-like metal, a band-like metal, or a heat insulating material knitted into a cylindrical shape or a semi-cylindrical shape.
Moreover, as the uneven | corrugated pattern transcribe | transferred to the outer peripheral part of the said slurry preparation container, what is formed in the axial direction of the said slurry preparation container at a fixed space | interval with the continuous or discontinuous linear or curved shape is preferable. ).

本発明に係るレオキャスト鋳造法によれば、スラリー作製容器内に溶融金属を注ぎ入れて当該スラリー作製容器内で半凝固状態の金属スラリーを作製する過程（スラリー作製工程）、若しくはスラリー作製容器ごと鋳造機の加圧スリーブに装填して金属スラリーを加圧する過程（装填・加圧工程）で、スラリー作製容器の外周部にプランジャーで加圧成形する工程において当該スラリー作製容器を軸方向に細かく潰れやすくするための細工を施すことが可能となる。
よって、従来のように別工程でもってスラリー作製容器の外周部に潰れやすくするための細工を施す場合と比較して、スラリー作製容器自体の製作コストを含めてコストの低減化を期することが出来る。 According to the rheocast casting method according to the present invention, a molten metal is poured into a slurry preparation container to produce a semi-solid metal slurry in the slurry preparation container (slurry preparation process), or for each slurry preparation container In the process of charging the metal slurry by loading it into the pressurizing sleeve of the casting machine (loading / pressing process), the slurry preparation container is made finer in the axial direction in the process of pressing the outer periphery of the slurry preparation container with a plunger. It becomes possible to give a work to make it easy to be crushed.
Therefore, compared to the case where the outer peripheral portion of the slurry preparation container is easily crushed by a separate process as in the past, it is possible to reduce the cost including the production cost of the slurry preparation container itself. I can do it.

以下、本発明に係るレオキャスト鋳造法の具体的な好適実施例を、図面を参照しながら詳細に説明するが、本発明は図示実施例のものに限定されるものではない。
なお、全図面を通して同様の構成部材には同じ符号を付してある。 Hereinafter, specific preferred embodiments of the rheocast casting method according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the illustrated embodiments.
In addition, the same code | symbol is attached | subjected to the same structural member through all the drawings.

本発明に係るレオキャスト鋳造法は、基本的に、冷却ホルダーで保持されたスラリー作製容器内に溶融金属を注ぎ入れる工程と、その後当該スラリー作製容器を冷却して半凝固状態の金属スラリーを作製する工程と、その後半凝固状態の金属スラリーを収容したままスラリー作製容器を搬送用ホルダーで鋳造機の加圧スリーブへ搬送し金属スラリーを収容したままスラリー作製容器ごと加圧スリーブに装填する工程と、加圧スリーブに装填された金属スラリー入りスラリー作製容器をプランジャーで加圧成形する工程とからなる。 The rheocast casting method according to the present invention basically includes a step of pouring molten metal into a slurry preparation container held by a cooling holder, and then cooling the slurry preparation container to prepare a semi-solid metal slurry. And a step of transporting the slurry preparation container to the pressure sleeve of the casting machine with a transport holder while containing the second half solidified metal slurry and loading the slurry preparation container together with the slurry preparation container into the pressure sleeve while containing the metal slurry. And a step of press-molding a slurry preparation container containing metal slurry loaded in a pressure sleeve with a plunger.

図１は、本発明に係るレオキャスト鋳造法を実施する鋳造機の要部を断面して示す模式図であり、図中の符号１は加圧スリーブ、符号２は固定型３と可動型４とで形成される金型キャビティを示す。 FIG. 1 is a schematic view showing a cross section of a main part of a casting machine for carrying out the rheocast casting method according to the present invention. In the figure, reference numeral 1 denotes a pressure sleeve, reference numeral 2 denotes a fixed mold 3 and a movable mold 4. The mold cavity formed by is shown.

加圧スリーブ１は、固定型３を支持している固定プラテン５を水平方向に貫通して水平状に配設され、その先端開口部（鋳込み口）が可動型４側に組込まれた分流子６と接離するように相対向状に配置され、さらに鋳込み口と反対側には金属スラリーを収容したスラリー作製容器７を装填するためのスラリー供給口１ａが上向きに開口形成され、その加圧スリーブ１に、スラリー供給口１ａ側から鋳込み口側へ向けて進退動作するプランジャー８が摺動自在に嵌挿されている。 The pressure sleeve 1 is horizontally disposed through the stationary platen 5 supporting the stationary mold 3 in the horizontal direction, and the tip opening (casting port) is incorporated on the movable mold 4 side. The slurry supply port 1a for loading the slurry preparation container 7 containing the metal slurry is formed in an upward direction on the opposite side to the casting port so as to be in contact with and away from the casting port. A plunger 8 that moves forward and backward from the slurry supply port 1a side to the casting port side is slidably fitted into the sleeve 1.

一方、スラリー作製容器７は冷却ホルダー２１に保持され、その状態で当該スラリー作製容器７内に保持炉から溶融金属が注ぎ込まれる。溶融金属が注ぎ込まれたスラリー作製容器７は冷却ホルダー２１が分離され、中の溶融金属が自然冷却されることにより、当該スラリー作製容器７の中で所定の固相率に調整された半凝固状態の金属スラリーが作製される。 On the other hand, the slurry preparation container 7 is held by the cooling holder 21, and in this state, molten metal is poured into the slurry preparation container 7 from the holding furnace. The slurry preparation container 7 into which the molten metal has been poured is separated from the cooling holder 21, and the molten metal therein is naturally cooled, so that the slurry preparation container 7 is in a semi-solid state adjusted to a predetermined solid phase ratio. A metal slurry is produced.

そして、半凝固状態になった金属スラリーを収容したスラリー作製容器７は、搬送用ホルダー(図示せず)でもって鋳造機の加圧スリーブ１へと搬送され、金属スラリーを収容したままスラリー作製容器７ごとスラリー供給口１ａから加圧スリーブ１内へと装填される。然る後、金属スラリー入りスラリー作製容器７をプランジャー８で加圧することにより、スラリー作製容器７が分流子６との間で押し潰されるため、スラリー作製容器７が一旦加圧スリーブ１の内周面方向に膨らんで押し広げられ、分流子６の開口部６ｂ’でスラリー作製容器７が破れて、中の金属スラリーのみがスラリー作製容器７から押し出され、分流子６で上向きにほぼ直角に向きを変えられ、金型のゲート部分（湯道）２ａを通って金型キャビティ２に圧入されて製品が鋳造される。 And the slurry preparation container 7 which accommodated the metal slurry which became the semi-solidified state is conveyed to the pressurization sleeve 1 of a casting machine with the holder for conveyance (not shown), and a slurry preparation container is stored with the metal slurry accommodated. 7 are loaded into the pressure sleeve 1 from the slurry supply port 1a. Thereafter, the slurry preparation container 7 is crushed between the metal separator 6 and the shunt 6 by pressurizing the slurry preparation container 7 containing metal slurry with the plunger 8. The slurry preparation container 7 is broken at the opening 6 b ′ of the diverter 6, and only the metal slurry inside is pushed out from the slurry preparation container 7. The direction is changed and the product is cast by being press-fitted into the mold cavity 2 through the gate portion (runner) 2a of the mold.

なお、図１中の符号９は、固定型３側に組込まれて分流子６の外周に接離自在に嵌合する鋳込み口ブッシュであり、図中の符号１０は加圧スリーブ１の鋳込み口を冷却するための循環式冷却水通路である。 Reference numeral 9 in FIG. 1 is a casting port bush that is assembled on the fixed die 3 side and is detachably fitted to the outer periphery of the flow divider 6. Reference numeral 10 in the drawing is a casting port of the pressure sleeve 1. It is a circulation type cooling water passage for cooling.

スラリー作製容器７は、その内部で作製される金属スラリーと同種系統の金属材料が好適に用いられ、その金属材料からなる薄い金属板を深絞り加工またはインパクト成形等により、１回の鋳造に必要な金属スラリーを収容し得る容積を有し且つ加圧スリーブ１の内径より少し小さい外径を有する略コップ形状（有底円筒形状）に形成される。 The slurry preparation container 7 is preferably made of a metal material of the same type as the metal slurry produced therein, and a thin metal plate made of the metal material is required for one casting by deep drawing or impact molding. It is formed in a substantially cup shape (bottomed cylindrical shape) having a volume capable of accommodating a small metal slurry and having an outer diameter slightly smaller than the inner diameter of the pressure sleeve 1.

また、スラリー作製容器７には、加圧スリーブ１内に装填してプランジャー８で加圧した際に当該スラリー作製容器７が軸方向に全体的に細かく折り畳まれるような形状にほぼ均一に潰れて中の金属スラリーが当該スラリー作製容器７からスムーズに押し出されるように、格別の細工が施される。具体的に、スラリー作製容器７の外周部に施される格別な細工とは、連続又は不連続な直線或いは曲線形状をした折れ目線または適当な幅・面積を有する折れ目域（以下、凹凸模様と総称する。）１２の事を言う。 Further, the slurry preparation container 7 is almost uniformly crushed into a shape such that when the slurry preparation container 7 is loaded into the pressure sleeve 1 and pressurized by the plunger 8, the slurry preparation container 7 is finely folded in the axial direction as a whole. In order to smoothly extrude the metal slurry in the slurry from the slurry preparation container 7, a special work is performed. Specifically, the special work applied to the outer peripheral portion of the slurry preparation container 7 is a crease line having a continuous or discontinuous straight line or curve shape, or a crease area having an appropriate width and area (hereinafter referred to as an uneven pattern). It says collectively.)

そしてこの凹凸模様１２は、スラリー作製容器７内に溶融金属を注ぎ入れ当該スラリー作製容器７内に半凝固状態の金属スラリーを収容したまま鋳造機の加圧スリーブ１に装填し加圧するまでの間、詳しくは、冷却ホルダー２１に保持されたスラリー作製容器７内に溶融金属を注ぎ入れて当該スラリー作製容器７内で半凝固状態の金属スラリーを作製するスラリー作製工程から、スラリー作製容器７内で半凝固状態の金属スラリーを加圧スリーブにスラリー作製容器７ごと装填して加圧成形する装填・加圧工程までの間に施される。 And this uneven | corrugated pattern 12 is poured to the pressurization sleeve 1 of a casting machine, and is pressurized while pouring molten metal in the slurry preparation container 7, and accommodating the metal slurry of the semi-solid state in the said slurry preparation container 7. Specifically, from the slurry preparation process in which molten metal is poured into the slurry preparation container 7 held by the cooling holder 21 to prepare a semi-solid metal slurry in the slurry preparation container 7, The semi-solidified metal slurry is applied to the pressure sleeve until the loading / pressurizing step in which the slurry preparation container 7 is loaded together with pressure forming.

凹凸模様１２は、スラリー作製容器７の外周部に浅く凹状に窪んだ線（筋）または凸状に膨らんだ線（筋）或いは適当な幅・面積を有する領域として形成される。具体的には、図２の（ａ）〜（ｈ）に模式的に例示したごとく、スラリー作製容器７の外周部に複数本の破線や実線からなる折れ目線ないしは折れ目域をスラリー作製容器７の軸方向に沿ってほぼ等間隔に水平状または傾斜状或いは螺旋状に形成することにより形成される。
ここで、「折れ目域」とは、折れ目線に対して線よりも広い適当な幅・面積を有する部分のことを言う。 The concavo-convex pattern 12 is formed as a shallow concave concave line (streak) or a convexly swollen line (streak) or a region having an appropriate width and area on the outer periphery of the slurry preparation container 7. Specifically, as schematically illustrated in (a) to (h) of FIG. 2, the slurry preparation container 7 includes a plurality of broken lines or fold lines formed on the outer peripheral portion of the slurry preparation container 7. It is formed by forming in a horizontal shape, an inclined shape or a spiral shape at substantially equal intervals along the axial direction.
Here, the “fold area” refers to a portion having an appropriate width and area wider than the line with respect to the crease line.

図３は、スラリー作製容器７の外周部に形成される凹凸模様１２が、冷却ホルダー２１で保持されたスラリー作製容器７内に溶融金属を注ぎ入れる工程から当該スラリー作製容器７内で半凝固状態の金属スラリーを作製する工程（金属スラリー作製工程）の中で形成される実施の一例を示したものである。 FIG. 3 shows that the uneven pattern 12 formed on the outer peripheral portion of the slurry preparation container 7 is in a semi-solid state in the slurry preparation container 7 from the step of pouring molten metal into the slurry preparation container 7 held by the cooling holder 21. 1 shows an example of an embodiment formed in the step of producing the metal slurry (metal slurry producing step).

本実施例では、スラリー作製容器７を鋳造機の加圧スリーブ１へ搬送するための冷却ホルダー２１の内周面に、スラリー作製容器７の外周部に形成したい凹凸模様１２と同様な連続又は不連続な直線或いは曲線形状をした突条で形成される凹凸模様３１を形成しておき、スラリー作製容器７内に溶融金属を注ぎ入れる工程中に上記凹凸模様３１をスラリー作製容器７の外周部に転写せしめることにより、スラリー作製容器７の外周部に凹凸模様１２を形成するようにしたものである。
なお、図２において上段の（a）と（ｂ）は模式平面図であり、下段の（a’）（ｂ’）はそれらの模式正面図を示したものである。また、（ｃ）は外周部に凹凸模様１２が転写されたスラリー作製容器７の模式正面図であり、（ｄ）は冷却ホルダー２１の内周面に形成された凹凸模様３１の一例を示す模式正面図である。 In this embodiment, the same or continuous pattern as the concavo-convex pattern 12 to be formed on the outer peripheral portion of the slurry preparation container 7 is formed on the inner peripheral surface of the cooling holder 21 for conveying the slurry preparation container 7 to the pressure sleeve 1 of the casting machine. A concave / convex pattern 31 formed by continuous straight or curved ridges is formed, and the concave / convex pattern 31 is placed on the outer periphery of the slurry preparation container 7 during the process of pouring molten metal into the slurry preparation container 7. By making it transfer, the concavo-convex pattern 12 is formed in the outer peripheral part of the slurry preparation container 7.
In FIG. 2, (a) and (b) in the upper stage are schematic plan views, and (a ′) and (b ′) in the lower stage are schematic front views thereof. (C) is a schematic front view of the slurry preparation container 7 having the concavo-convex pattern 12 transferred to the outer peripheral portion, and (d) is a schematic diagram illustrating an example of the concavo-convex pattern 31 formed on the inner peripheral surface of the cooling holder 21. It is a front view.

本実施例の場合、スラリー作製容器７の中に溶融金属を注ぎ入れる注湯工程において、（a）溶融金属を注ぎ入れる前、若しくは溶融金属を注ぎ入れた後に、（ｂ）スラリー作製容器７の外周部を、例えば２分割された冷却ホルダー２１(21a,21b)で圧迫することにより、当該スラリー作製容器７が溶融金属の熱で軟化しているので、（ｃ）冷却ホルダー２１(21a,21b) の内周面に形成された凹凸模様３１がスラリー作製容器７の外周部に確実に転写され、その結果、スラリー作製容器７の外周部に凹凸模様１２が形成される。 In the case of the present embodiment, in the pouring step of pouring the molten metal into the slurry preparation container 7, (a) before pouring the molten metal or after pouring the molten metal, (b) Since the slurry container 7 is softened by the heat of the molten metal by pressing the outer peripheral portion with, for example, the cooling holder 21 (21a, 21b) divided into two parts, (c) the cooling holder 21 (21a, 21b) ) Is reliably transferred to the outer periphery of the slurry preparation container 7, and as a result, the uneven pattern 12 is formed on the outer periphery of the slurry preparation container 7.

また、スラリー作製容器７内に溶融金属を注ぎ入れることにより当該スラリー作製容器７が軟化し同時に外周方向に熱膨張するので、溶融金属の重みによりスラリー作成容器７が外周方向に広がる力も加わって、スラリー作製容器７が熱膨張した時にその外周部が冷却ホルダー２１(21a,21b)の内周面に密着するように構成すれば、冷却ホルダー２１(21a,21b)で積極的に圧迫せずとも冷却ホルダー２１(21a,21b) の内周面に形成された凹凸模様３１がスラリー作製容器７の外周部に転写され、スラリー作製容器７の外周部に凹凸模様１２が形成される。 In addition, since the slurry preparation container 7 is softened by pouring the molten metal into the slurry preparation container 7 and simultaneously expands in the outer peripheral direction, a force that spreads the slurry preparation container 7 in the outer peripheral direction due to the weight of the molten metal is added, If the outer peripheral portion of the slurry preparation container 7 is thermally expanded when it is thermally expanded, the outer peripheral portion of the slurry preparation container 7 is in close contact with the inner peripheral surface of the cooling holder 21 (21a, 21b). The concavo-convex pattern 31 formed on the inner peripheral surface of the cooling holder 21 (21a, 21b) is transferred to the outer peripheral portion of the slurry preparation container 7, and the concavo-convex pattern 12 is formed on the outer peripheral portion of the slurry preparation container 7.

なお、冷却ホルダー２１(21a,21b) の内周面に格別凹凸模様３１を形成せずに、冷却ホルダー２１(21a,21b)とは別に専用型(図示せず)を用意し、その専用型の内周面に凹凸模様３１を形成することにより、スラリー作成容器７を冷却ホルダー２１から分離し、中の溶融金属が自然冷却して半凝固状態の金属スラリーになるまで冷却される工程の間に、上記と同様にしてスラリー作製容器７の外周部に凹凸模様１２を形成することも考えられる。この場合、専用型をスラリー作製容器７の外周部に対して昇降或いは回転自在に構成することにより、１個の型で複数種の凹凸模様１２を創出することが可能となる。 In addition, a special type (not shown) is prepared separately from the cooling holder 21 (21a, 21b) without forming the special uneven pattern 31 on the inner peripheral surface of the cooling holder 21 (21a, 21b). During the process of separating the slurry preparation container 7 from the cooling holder 21 and cooling it until the molten metal therein is naturally cooled to become a semi-solidified metal slurry by forming the uneven pattern 31 on the inner peripheral surface of In addition, it is also conceivable to form the uneven pattern 12 on the outer peripheral portion of the slurry preparation container 7 in the same manner as described above. In this case, by configuring the dedicated mold so as to be movable up and down or rotatable with respect to the outer peripheral portion of the slurry preparation container 7, it is possible to create a plurality of types of uneven patterns 12 with a single mold.

更に、半凝固状態の金属スラリーが収容されたスラリー作製容器７を鋳造機の加圧スリーブ１へ搬送するための搬送用ホルダー(図示せず)の内周面に、冷却ホルダー２１(21a,21b)と同様に、スラリー作製容器７の外周部に圧接する連続又は不連続な直線或いは曲線形状をした突条で形成され凹凸模様を形成し、該搬送用ホルダーでスラリー作製容器７を鋳造機の加圧スリーブへ装填するまでの間に上記凹凸模様をスラリー作製容器の外周部に転写せしめるようにしても良い。 Further, a cooling holder 21 (21a, 21b) is formed on the inner peripheral surface of a transfer holder (not shown) for transferring the slurry preparation container 7 containing the semi-solid metal slurry to the pressure sleeve 1 of the casting machine. In the same manner as in the above, a concavo-convex pattern is formed by a continuous or discontinuous straight or curved ridge that presses against the outer peripheral portion of the slurry preparation container 7, and the slurry preparation container 7 of the casting machine is You may make it transfer the said uneven | corrugated pattern to the outer peripheral part of a slurry preparation container before loading to a pressurization sleeve.

また、図４に示した実施例は、スラリー作製容器７の中に溶融金属を注ぎ入れた後半凝固状態の金属スラリーを作製する工程中に、当該スラリー作製容器７の外周部に凹凸模様１２を打刻により形成せしめことにより、プランジャーで加圧成形する工程において当該スラリー作製容器７を軸方向に潰れやすく形成したものである。
すなわち、スラリー作製容器７の周囲に、エアシリンダ等の往復運動が可能な機器４１に金属板等で形成された打撃体４２を１個或いは複数個配設せしめ、当該スラリー作製容器７内に溶融金属を注ぎ入れた後であって半凝固状態の金属スラリーを作製中に、溶融金属の熱で軟化しているスラリー作製容器７の外周部を打撃体４２で打撃することにより凹凸模様１２を打刻形成せしめたものである。
この際、上記打撃体４２をスラリー作製容器７の外周部に対して昇降或いは回転自在に構成することにより、少ない打撃体４２で複数種の凹凸模様１２を創出することが可能となる。 Further, in the embodiment shown in FIG. 4, the uneven pattern 12 is formed on the outer peripheral portion of the slurry preparation container 7 during the process of preparing the metal slurry in the latter half solidified state by pouring molten metal into the slurry preparation container 7. By forming by stamping, the slurry preparation container 7 is easily crushed in the axial direction in the step of pressure molding with a plunger.
That is, one or a plurality of striking bodies 42 made of a metal plate or the like are disposed around the slurry preparation container 7 on a device 41 capable of reciprocating movement such as an air cylinder, and melted in the slurry preparation container 7. After the metal is poured in and during the production of the semi-solid metal slurry, the concavo-convex pattern 12 is hit by hitting the outer periphery of the slurry preparation container 7 softened by the heat of the molten metal with the hitting body 42. It is what was formed.
At this time, by configuring the impacting body 42 to be movable up and down or rotatable with respect to the outer peripheral portion of the slurry preparation container 7, it is possible to create a plurality of types of uneven patterns 12 with a small number of impacting bodies 42.

また、図５は、スラリー作製容器７の外周部に、スラリー作製容器の外周部と接触する凹凸転写部材５１を設け、その状態で、溶融金属を注ぎ入れる前、若しくは溶融金属を注ぎ入れた後に、スラリー作製容器７の外周部を、例えば２分割された冷却ホルダー２１(21a,21b)或いは搬送用ホルダーで圧迫することにより、凹凸転写部材５１の凹凸模様をスラリー作製容器７の外周部に転写せしめ、スラリー作製容器７の外周部に凹凸模様１２を形成するようにしたものである。
ちなみに、凹凸転写部材５１としては、金属コイルや、紐状の金属又は帯状の金属又は断熱材を筒形状又は半円筒形状に編んで作成された等を挙げることができる。 Further, FIG. 5 shows that an uneven transfer member 51 that is in contact with the outer peripheral portion of the slurry preparation container is provided on the outer peripheral portion of the slurry preparation container 7, and in that state, before pouring the molten metal or after pouring the molten metal. Then, the concavo-convex pattern of the concavo-convex transfer member 51 is transferred to the outer peripheral portion of the slurry preparation container 7 by pressing the outer peripheral portion of the slurry preparation container 7 with, for example, the two divided cooling holders 21 (21a, 21b) or the conveyance holder. The concavo-convex pattern 12 is formed on the outer periphery of the slurry preparation container 7.
Incidentally, as the concavo-convex transfer member 51, a metal coil, a string-like metal, a band-like metal, or a heat insulating material can be used that is formed by knitting into a cylindrical shape or a semicylindrical shape.

この実施例の場合も、スラリー作製容器７内に溶融金属を注ぎ入れることにより当該スラリー作製容器７が溶融金属の熱で軟化し同時に外周方向に熱膨張する性質を利用して、スラリー作製容器７の外周部を凹凸転写部材５１で拘束することにより、該凹凸転写部材５１の凹凸模様がスラリー作製容器７の外周部に転写され、スラリー作製容器７の外周部に凹凸模様１２を形成することができる。従って、この実施例では上記実施例のように冷却ホルダー２１(21a,21b)で圧迫する必要がなくなる。 Also in the case of this embodiment, the slurry preparation container 7 is utilized by utilizing the property that when the molten metal is poured into the slurry preparation container 7, the slurry preparation container 7 is softened by the heat of the molten metal and simultaneously thermally expanded in the outer peripheral direction. By constraining the outer peripheral portion of the slurry preparing container 7 with the uneven transfer member 51, the uneven pattern of the uneven transfer member 51 is transferred to the outer peripheral portion of the slurry preparing container 7, and the uneven pattern 12 is formed on the outer peripheral portion of the slurry preparing container 7. it can. Therefore, in this embodiment, it is not necessary to press with the cooling holder 21 (21a, 21b) as in the above embodiment.

更に、格別図示はしなかったが、溶融金属を注ぎ入れた後のスラリー作製容器７の外周部に上記凹凸転写部材５１を取付け、スラリー作製容器７内で半凝固状態の金属スラリーが作製されたらそのままスラリー作製容器７を鋳造機の加圧スリーブ１に装填することにより、スラリー作製容器７の外周部に擬似凹凸模様を形成することも考えられる。すなわち、半凝固状態の金属スラリーが作製されたスラリー作製容器７の外周部に上記凹凸転写部材５１を取付け、そのまま鋳造機の加圧スリーブ１に装填してプランジャー８で加圧すると、スラリー作製容器７が外周方向に加圧スリーブ１の内径まで膨張するが、スラリー作製容器７の外周部は鋳造機の加圧スリーブ１内において凹凸転写部材５１で拘束された状態になるので、加圧の初期段階において凹凸転写部材５１の凹凸模様がスラリー作製容器７の外周部に転写されたと同様となり、その結果、スラリー作製容器７が軸方向に潰れやすくなる。 Further, although not specifically shown, when the uneven transfer member 51 is attached to the outer periphery of the slurry preparation container 7 after pouring the molten metal, and a semi-solidified metal slurry is prepared in the slurry preparation container 7 It is also conceivable to form a pseudo uneven pattern on the outer periphery of the slurry preparation container 7 by loading the slurry preparation container 7 as it is into the pressure sleeve 1 of the casting machine. That is, when the uneven transfer member 51 is attached to the outer periphery of the slurry preparation container 7 in which a semi-solid metal slurry is prepared, and loaded into the pressure sleeve 1 of the casting machine as it is and pressurized with the plunger 8, the slurry is prepared. Although the container 7 expands to the inner diameter of the pressure sleeve 1 in the outer peripheral direction, the outer peripheral portion of the slurry preparation container 7 is constrained by the uneven transfer member 51 in the pressure sleeve 1 of the casting machine. In the initial stage, the concavo-convex pattern of the concavo-convex transfer member 51 is the same as that transferred to the outer peripheral portion of the slurry preparation container 7, and as a result, the slurry preparation container 7 is easily crushed in the axial direction.

更に前記した実施例の変形例として、凹凸転写部材５１をスラリー作製容器７の外周部に取付けずに、予め鋳造機の加圧スリーブ１内にセットしておくことも考えられる。この場合、スラリー作製容器７を加圧スリーブ１内に装填するため、凹凸転写部材５１を上下半分割して、凹凸転写部材５１の下側半分は予め加圧スリーブ１内にセットしておき、スラリー作製容器７を加圧スリーブ１内に装填した後に凹凸転写部材５１の上側半分をスラリー作製容器７に被せるようにセットする。 Further, as a modification of the above-described embodiment, it is conceivable that the uneven transfer member 51 is set in advance in the pressure sleeve 1 of the casting machine without being attached to the outer peripheral portion of the slurry preparation container 7. In this case, in order to load the slurry preparation container 7 into the pressure sleeve 1, the concave / convex transfer member 51 is divided into upper and lower halves, and the lower half of the concave / convex transfer member 51 is set in the pressurization sleeve 1 in advance. After the slurry preparation container 7 is loaded in the pressure sleeve 1, the upper half of the uneven transfer member 51 is set so as to cover the slurry preparation container 7.

本発明に係るレオキャスト鋳造機の要部を断面して示す模式図。The schematic diagram which cuts and shows the principal part of the rheocast casting machine which concerns on this invention. （a）〜（ｈ）は本発明に係るスラリー作製容器の外周部に形成された凹凸模様の各実施例を示す模式図。(A)-(h) is a schematic diagram which shows each Example of the uneven | corrugated pattern formed in the outer peripheral part of the slurry preparation container which concerns on this invention. スラリー作製容器の外周部に凹凸模様を転写する仕組みの実施の一例を説明する工程図であり、（a）及び（ｂ）は模式平面図、（a’）（ｂ’）はそれらの模式正面図、（ｃ）は外周部に凹凸模様が転写されたスラリー作製容器の模式正面図、（ｄ）は冷却ホルダーの内周面に形成された凹凸模様の一例を示す模式正面図。It is process drawing explaining an example of implementation of the structure which transfers an uneven | corrugated pattern to the outer peripheral part of a slurry preparation container, (a) And (b) is a schematic plan view, (a ') (b') is those schematic front surfaces FIG. 4C is a schematic front view of a slurry preparation container having a concavo-convex pattern transferred to the outer periphery, and FIG. 5D is a schematic front view showing an example of the concavo-convex pattern formed on the inner peripheral surface of the cooling holder. スラリー作製容器の外周部に凹凸模様を転写する仕組みの他の実施例を示す説明図であり、（a）は模式平面図、（ｂ）は模式正面図。It is explanatory drawing which shows the other Example of the mechanism which transfers an uneven | corrugated pattern to the outer peripheral part of a slurry preparation container, (a) is a model top view, (b) is a model front view. スラリー作製容器の外周部に凹凸模様を転写する仕組みの更に他の実施例を示す説明図であり、（a）は模式平面図、（ｂ）は模式正面図。It is explanatory drawing which shows the further another Example of the mechanism which transfers an uneven | corrugated pattern to the outer peripheral part of a slurry preparation container, (a) is a schematic plan view, (b) is a schematic front view.

Explanation of symbols

１：加圧スリーブ２：金型キャビティ
３：固定型４：可動型
５：固定プラテン６：分流子
６ａ：導入正面６ｂ：スラリー導入トンネル
７：スラリー作製容器７ａ：スラリー作製容器の底部
８：プランジャー９：鋳込み口ブッシュ
１０：冷却水通路
１２：凹凸模様２１：冷却ホルダー
３１：冷却ホルダーの凹凸模様
４１：機器４２：打撃体
５１：凹凸転写部材 1: Pressurizing sleeve 2: Mold cavity 3: Fixed mold 4: Movable mold 5: Fixed platen 6: Shunt 6a: Introduction front 6b: Slurry introduction tunnel 7: Slurry preparation container 7a: Bottom of slurry preparation container 8: Plan Jar 9: Casting port bush 10: Cooling water passage
12: Concavity and convexity pattern 21: Cooling holder 31: Concavity and convexity pattern of cooling holder 41: Equipment 42: Impacting body 51: Concavity and convexity transfer member

Claims

A step of pouring molten metal into a slurry preparation container held by a cooling holder, a step of cooling the slurry preparation container to prepare a semi-solid metal slurry, and a slurry preparation container containing the metal slurry thereafter. In the rheocast casting method comprising the step of loading the whole into a pressure sleeve of the casting machine and the step of pressure forming the slurry preparation container with a plunger,
A concave / convex pattern is formed on the inner peripheral surface of the cooling holder, and the concave / convex pattern is transferred to the outer periphery of the slurry preparation container during the process of pouring molten metal into the slurry preparation container and transferred to the outer periphery of the slurry preparation container. A rheocast casting method characterized in that the slurry preparation container is easily crushed in the axial direction in the step of pressure molding with a plunger using the uneven pattern formed.

A step of pouring molten metal into a slurry preparation container held by a cooling holder, a step of cooling the slurry preparation container to prepare a semi-solid metal slurry, and a slurry preparation container containing the metal slurry thereafter. In a rheocast casting method comprising a step of loading the whole pressure sleeve of a casting machine and a step of pressure-forming the slurry preparation container with a plunger,
During the step of cooling the slurry preparation container to prepare a semi-solid state metal slurry, an uneven pattern is engraved on the outer peripheral portion of the slurry preparation container, and the step of press molding with a plunger using the uneven pattern A rheocast casting method characterized in that the slurry container is easily crushed in the axial direction.

The step of pouring molten metal into a slurry preparation container held by a cooling holder, the step of cooling the slurry preparation container to prepare a metal slurry in a semi-solid state, and the latter half of the solid-state metal slurry were accommodated The step of transporting the slurry preparation container to the pressure sleeve of the casting machine with the carrier holder and loading the slurry preparation container together with the slurry preparation container while containing the metal slurry, and the step of pressure forming the slurry preparation container with the plunger In the rheocast casting method consisting of
Forming a concavo-convex pattern on the inner peripheral surface of the transport holder, and transferring the concavo-convex pattern to the outer peripheral portion of the slurry preparation container in a step of loading the slurry preparation container into a pressure sleeve of a casting machine with the transport holder, A rheocast casting method characterized in that the slurry preparation container is easily crushed in the axial direction in a step of pressure forming with a plunger by means of a transferred concavo-convex pattern.

The step of pouring molten metal into a slurry preparation container held by a cooling holder, the step of cooling the slurry preparation container to prepare a metal slurry in a semi-solid state, and the latter half of the solid-state metal slurry were accommodated The step of transporting the slurry preparation container to the pressure sleeve of the casting machine with the carrier holder and loading the slurry preparation container together with the slurry preparation container while containing the metal slurry, and the step of pressure forming the slurry preparation container with the plunger In the rheocast casting method consisting of
In the step of providing an uneven transfer member in the outer periphery of the slurry preparation container or in the pressure sleeve, and pressing the slurry preparation container with the plunger, the uneven pattern of the uneven transfer member is formed in the outer periphery of the slurry preparation container. A rheocast casting method characterized in that the slurry preparation container is easily crushed in the axial direction in the step of pressure forming with a plunger using the transferred concavo-convex pattern.

5. The rheocast casting method according to claim 4, wherein the uneven transfer member is made by knitting a metal coil, a string-shaped metal material, a band-shaped metal material or a heat insulating material.

The rheocast casting method according to any one of claims 1 to 4, wherein the concavo-convex pattern transferred to the outer peripheral portion of the slurry preparation container is formed in a continuous or discontinuous straight or curved shape.