JP2018153827A - Die casting die - Google Patents

Die casting die Download PDF

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JP2018153827A
JP2018153827A JP2017051152A JP2017051152A JP2018153827A JP 2018153827 A JP2018153827 A JP 2018153827A JP 2017051152 A JP2017051152 A JP 2017051152A JP 2017051152 A JP2017051152 A JP 2017051152A JP 2018153827 A JP2018153827 A JP 2018153827A
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die
product
facing surface
casting
mold
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JP6487479B2 (en
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優輝 福岡
Yuki Fukuoka
優輝 福岡
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Ryobi Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a die casting die capable of obtaining a product of high quality and having high durability.SOLUTION: Provided is a die casting die comprising: a stationary die; and a movable die movable to the stationary die and dividing a cavity together with the stationary die, and composed in such a manner that a molten metal fed from an injection sleeve 12 is struck against a molten metal hold 20 and is made to flow into the cavity to cast a die-cast product W, in which, after the casting, the molten metal press 20 is composed so as to be slidably movable to the die-cast product W, where the product confronted face 23a of the molten metal press 20 is provided with a draft α to the slide direction.SELECTED DRAWING: Figure 2

Description

本発明はダイカスト金型に関し、特に射出スリーブに対向して設けられ、溶湯がその表面を通過する湯押えを有するダイカスト金型に関するものである。   The present invention relates to a die-casting die, and more particularly to a die-casting die provided with a hot water presser that is provided facing an injection sleeve and through which a molten metal passes.

アルミニウム合金やマグネシウム合金を鋳造するためのダイカスト金型が知られている。ダイカスト金型はそのキャビティ内に溶湯が流入して加圧、硬化されることにより、キャビティに倣った形状の製品を製造することができる。射出スリーブ内をプランジャーが摺動し、スリーブに対向した湯押えに当たって溶湯はキャビティ内に流入する。この湯押えには上下方向にスライド移動可能なものがあり、可動型の固定型に対する型開き後、湯押えが下降して製品が取り出されるタイプのものがある。特許文献１にはこのようなダイカスト金型の開示がある。   Die casting molds for casting aluminum alloys and magnesium alloys are known. The die-casting mold can manufacture a product having a shape following the cavity by flowing the molten metal into the cavity and pressurizing and curing. The plunger slides in the injection sleeve, and the molten metal flows into the cavity when it hits the presser foot facing the sleeve. Some of the hot water pressers are slidable in the vertical direction, and there is a type in which the hot water presser is lowered and the product is taken out after the movable fixed mold is opened. Patent Document 1 discloses such a die casting mold.

こうした従来の技術では、湯押えの下降時に該湯押えの製品対向面と製品との摺接により、製品にカジリ等が発生する可能性があり、他に金型（湯押え部も含む）も傷む可能性があった。また、射出時にこの製品対向面への溶湯による浸食で製品対向面が該スライド方向に対してアンダーカット形状となる（浸食部分に溶湯が入る）場合があり、結果として湯押えの下降時に製品や金型を傷める可能性があり、改善の余地があった。   In such a conventional technique, there is a possibility that galling or the like may occur in the product due to the sliding contact between the product-facing surface of the hot presser and the product when the presser foot is lowered. There was a possibility of injury. In addition, erosion by molten metal on the product facing surface during injection may cause the product facing surface to have an undercut shape with respect to the sliding direction (melt enters the eroded portion). The mold could be damaged and there was room for improvement.

特開２００９−９０３５７号公報JP 2009-90357 A

本発明はこのような問題を解決するためになされたもので、品質のよい製品を得る事が可能で、耐久性のあるダイカスト金型を提供することを目的とする。   The present invention has been made to solve such problems, and an object of the present invention is to provide a durable die-casting mold capable of obtaining a high-quality product.

本発明は上記目的を達成するため、固定型と、該固定型に対して移動可能で該固定型と共にキャビティを画成する可動型とを有し、射出スリーブより供給される溶湯が湯押えにあたって該キャビティに流入してダイカスト製品が鋳造されるよう構成され、鋳造後、該湯押えが該ダイカスト製品に対してスライド移動可能に構成されているダイカスト金型において、該湯押えの該製品対向面には該スライド方向に対する抜き勾配が設けられていることを特徴としている。   In order to achieve the above object, the present invention has a fixed mold and a movable mold that is movable with respect to the fixed mold and defines a cavity together with the fixed mold. In a die-casting die configured to flow into the cavity and die cast product is cast, and the hot water presser is slidable relative to the die cast product after casting, the product facing surface of the hot water presser Is characterized in that a draft angle with respect to the sliding direction is provided.

また、該湯押えの製品対向面は該製品のビスケット部対向面とランナー部対向面とを有し、該ビスケット部対向面と該ランナー部対向面とを同一の抜き勾配としたことを特徴としている。   Further, the product facing surface of the hot water presser has a biscuit facing surface and a runner facing surface of the product, and the biscuit facing surface and the runner facing surface have the same draft angle. Yes.

また、該ランナー部対向面の抜き勾配を該ビスケット部対向面の抜き勾配よりも大きくしたことを特徴としている。   Further, the draft angle of the opposing surface of the runner part is larger than the draft angle of the opposing surface of the biscuit part.

本発明によれば、湯押えに抜き勾配が設けられることにより、スライド移動がスムーズになり、品質のよい製品を得る事が可能で、耐久性のあるダイカスト金型を提供することができる。   According to the present invention, since the draft is provided in the hot water presser, the sliding movement becomes smooth, a product with good quality can be obtained, and a durable die casting mold can be provided.

本発明に係るダイカスト金型の要部を示し、（ａ）は型閉じ状態を示す側面断面図であり、（ｂ）は（ａ）のＡ−Ａ断面図である。The principal part of the die-casting metal mold | die which concerns on this invention is shown, (a) is side sectional drawing which shows a mold closed state, (b) is AA sectional drawing of (a). 本発明に係るダイカスト金型の要部を示す側面断面図であり、（ａ）は可動型が開いた状態を示し、（ｂ）は湯押えが下降した状態を示す。It is side surface sectional drawing which shows the principal part of the die-cast metal mold | die which concerns on this invention, (a) shows the state which the movable mold | type opened, (b) shows the state which the hot water presser descended. 本発明に係るダイカスト金型の第２の実施例の要部を示し、（ａ）は型閉じ状態を示す側面断面図であり、（ｂ）は（ａ）のＢ−Ｂ断面図である。The principal part of 2nd Example of the die-casting die concerning this invention is shown, (a) is side sectional drawing which shows a mold closed state, (b) is BB sectional drawing of (a). 本発明に係るダイカスト金型の第２の実施例の要部を示す側面断面図であり、（ａ）は可動型が開いた状態を示し、（ｂ）は湯押えが下降した状態を示す。It is side surface sectional drawing which shows the principal part of 2nd Example of the die-casting metal mold | die which concerns on this invention, (a) shows the state which the movable mold | type opened, (b) shows the state which the hot metal presser lowered. （ａ）、（ｂ）共に、本発明に係るダイカスト金型の湯押えの他の実施例を示す側面断面図である。(A), (b) is side sectional drawing which shows the other Example of the hot stamping of the die-casting die which concerns on this invention.

以下、本発明の実施形態にかかるダイカスト金型について図１〜図５を参酌しつつ説明する。   Hereinafter, a die casting mold according to an embodiment of the present invention will be described with reference to FIGS.

図１は本発明に係るダイカスト金型の要部を示し、（ａ）は型閉じ状態を示す側面断面図であり、（ｂ）は（ａ）のＡ−Ａ断面図である。この金型は主に固定型、図示しない可動型、湯押え２０により構成されている。可動型の可動ダイスと固定型の固定ダイス１１とでキャビティが画成されることとなる。固定型の固定ホルダ１０には固定ダイス１１が埋設されている。固定ホルダ１０と固定ダイス１１との間には図１（ａ）中左右方向に延びる円筒状の射出スリーブ１２が固定されている。射出スリーブ１２内には図示しないラドルにより汲み出された溶湯が注湯され、図示しないプランジャーが射出スリーブ内を図２（ａ）中左方向に前進することにより、溶湯はキャビティ内に高圧で押し込まれ、アルミニウムダイカスト製品Ｗを得る事ができる。   FIG. 1 shows a main part of a die casting mold according to the present invention, (a) is a side sectional view showing a mold closed state, and (b) is an AA sectional view of (a). This mold is mainly composed of a fixed mold, a movable mold (not shown), and a hot water presser 20. A cavity is defined by the movable movable die and the fixed stationary die 11. A stationary die 11 is embedded in the stationary holder 10. A cylindrical injection sleeve 12 extending in the left-right direction in FIG. 1A is fixed between the fixed holder 10 and the fixed die 11. A molten metal pumped out by a ladle (not shown) is poured into the injection sleeve 12, and a plunger (not shown) moves forward in the injection sleeve in the left direction in FIG. 2 (a), so that the molten metal has a high pressure in the cavity. It is pushed in and the aluminum die-cast product W can be obtained.

湯押え２０は湯押えホルダ２１とこれに固定される湯押えダイス２２とで構成されており、両者にまたがって湯押え本体２３が形成されている。湯押え２０は可動型と一体で固定型に対して図１（ａ）中左右方向に移動可能に構成されている。また、湯押え２０は可動型に対して、図中上下方向にスライド移動可能に構成されている。湯押え本体２３の図１（ａ）中右端には製品対向面２３ａが形成されている。この製品対向面２３ａは湯押え２０の上下スライド移動方向に対する抜き勾配αを有している。本実施例ではこの角度は４度である。また、符号Ｗはキャビティ内で製造されるダイカスト製品の一部を示しており、厚肉のビスケット部Ｗ１と薄肉のランナー部Ｗ２とを有している。なお、抜き勾配αについては、ビスケット部Ｗ１やランナー部Ｗ２の大きさなどにより、１度〜１５度の範囲で任意に設定可能である。   The hot water presser 20 includes a hot water presser holder 21 and a hot water presser die 22 fixed to the hot water presser holder 21, and a hot water presser main body 23 is formed across both. The hot water presser 20 is configured integrally with the movable die so as to be movable in the left-right direction in FIG. Further, the hot water presser 20 is configured to be slidable in the vertical direction in the figure with respect to the movable type. A product facing surface 23a is formed at the right end of the hot water presser main body 23 in FIG. The product facing surface 23a has a draft angle α with respect to the vertical slide movement direction of the presser foot 20. In this embodiment, this angle is 4 degrees. Reference numeral W denotes a part of a die-cast product manufactured in the cavity, and has a thick biscuit portion W1 and a thin runner portion W2. The draft α can be arbitrarily set in the range of 1 to 15 degrees depending on the size of the biscuit part W1 and the runner part W2.

本実施例のダイカスト金型の型開きから製品の取り出しについて説明する。キャビティへの溶湯注入後、所定時間経過したら図示しない可動型が図２中左方向へ移動することにより、湯押え２０は図２（ａ）のように固定ホルダ１０等から離れる。次に湯押え２０は可動型に対してスライド移動して下降し、図２（ｂ）のような状態となる。この時、湯押え本体２３の製品対向面２３ａの抜き勾配αにより、湯押え２０は製品Ｗとスムーズに摺接しながら離れることとなり、製品Ｗへの悪影響を及ぼすことがなく、品質のよいダイカスト製品を得る事ができる。また、金型への悪影響（過度の負荷）もないので耐久性が増す。   The removal of the product from the mold opening of the die casting mold of the present embodiment will be described. When a predetermined time elapses after the molten metal is injected into the cavity, the movable mold (not shown) moves leftward in FIG. 2, so that the hot water presser 20 is separated from the fixed holder 10 and the like as shown in FIG. Next, the hot water presser 20 slides and moves down with respect to the movable mold, and is in a state as shown in FIG. At this time, due to the draft angle α of the product-facing surface 23a of the hot water presser body 23, the hot water presser 20 is separated from the product W in a smooth sliding contact, and the product W is not adversely affected. Can be obtained. Further, since there is no adverse effect (excessive load) on the mold, durability is increased.

図３、４に本発明に係るダイカスト金型の第２実施例を示す。前述の実施例と同様の構成については説明を省略する。湯押え本体２３は固定型側に膨出した形状をしていることにより、２つの製品対向面２３ａ１と２３ａ２を有することとなる。下側の製品対向面２３ａ１はビスケット部Ｗ１に対向し、上側の製品対向面２３ａ２はランナー部Ｗ２に対向することとなる。下側の製品対向面２３ａ１の抜き勾配α１と上側の製品対向面２３ａ２の抜き勾配α２とは同一角度に構成されている。本実施例も前述と同様、抜き勾配α１、α２により、湯押え２０は製品Ｗとスムーズに摺接しながら離れることとなり、製品Ｗへの悪影響を及ぼすことがなく、品質のよいダイカスト製品を得る事ができる。また、金型への悪影響もないので耐久性が増す。   3 and 4 show a second embodiment of the die casting mold according to the present invention. The description of the same configuration as that of the above-described embodiment is omitted. The hot water presser main body 23 has two product facing surfaces 23a1 and 23a2 because it has a shape bulging toward the fixed mold side. The lower product facing surface 23a1 faces the biscuit portion W1, and the upper product facing surface 23a2 faces the runner portion W2. The draft angle α1 of the lower product facing surface 23a1 and the draft angle α2 of the upper product facing surface 23a2 are configured at the same angle. In this embodiment as well, as described above, the presser foot 20 is separated from the product W while sliding smoothly with the drafts α1 and α2, so that a good quality die cast product can be obtained without adversely affecting the product W. Can do. Further, durability is increased because there is no adverse effect on the mold.

図５に本発明に係るダイカスト金型の湯押え部の他の実施例を示す。本実施例の湯押え本体２３も第２実施例と同様、固定型側に膨出した形状をしている。図５（ａ）は下側の製品対向面２３ａ３の抜き勾配α３が上側の製品対向面２３ａ４の抜き勾配α４よりも小さく構成されている。また、図５（ｂ）は下側の製品対向面２３ａ５の抜き勾配α５が上側の製品対向面２３ａ６の抜き勾配α６よりも大きく構成されている。これらの勾配については、湯道の大きさや鋳造条件等により生じる製品Ｗと湯押え２０とのスライド抵抗によって任意の勾配を設定すればよい。   FIG. 5 shows another embodiment of the hot water presser portion of the die casting mold according to the present invention. Similarly to the second embodiment, the hot water presser main body 23 of the present embodiment also has a shape that bulges to the fixed mold side. In FIG. 5A, the draft angle α3 of the lower product facing surface 23a3 is configured to be smaller than the draft angle α4 of the upper product facing surface 23a4. In FIG. 5B, the draft angle α5 of the lower product facing surface 23a5 is larger than the draft angle α6 of the upper product facing surface 23a6. As for these gradients, an arbitrary gradient may be set depending on the slide resistance between the product W and the hot water presser 20 generated depending on the size of the runner, casting conditions, and the like.

なお、本発明は、前記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更が可能である。例えば前述の実施形態では、製品Ｗの材料としてアルミニウムが用いられていたが、これに限らず、マグネシウムダイカストや亜鉛ダイカストでもよい。   In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention. For example, in the above-described embodiment, aluminum is used as the material of the product W. However, the material is not limited to this, and may be magnesium die casting or zinc die casting.

本発明に係るダイカスト金型は、湯押えがダイカスト製品に対してスライド移動可能に構成されたダイカスト金型において極めて有用である。   The die casting mold according to the present invention is extremely useful in a die casting mold in which a hot water presser is configured to be slidable relative to a die casting product.

１０ ：固定ホルダ
１１ ：固定ダイス
１２ ：射出スリーブ
２０ ：湯押え
２１ ：湯押えホルダ
２２ ：湯押えダイス
２３ ：湯押え本体
２３ａ ：製品対向面
２３ａ１ ：下側製品対向面
２３ａ２ ：上側製品対向面
２３ａ３ ：下側製品対向面
２３ａ４ ：上側製品対向面
２３ａ５ ：下側製品対向面
２３ａ６ ：上側製品対向面
Ｗ ：ダイカスト製品
Ｗ１ ：ビスケット部
Ｗ２ ：ランナー部
10: Fixed holder 11: Fixed die 12: Injection sleeve 20: Hot presser 21: Hot press holder 22: Hot press die 23: Hot press body 23a: Product facing surface 23a1: Lower product facing surface 23a2: Upper product facing surface 23a3 : Lower product facing surface 23a4: Upper product facing surface 23a5: Lower product facing surface 23a6: Upper product facing surface W: Die-cast product W1: Biscuit portion W2: Runner portion

Claims (3)

固定型と、該固定型に対して移動可能で該固定型と共にキャビティを画成する可動型とを有し、射出スリーブより供給される溶湯が湯押えにあたって該キャビティに流入してダイカスト製品が鋳造されるよう構成され、鋳造後、該湯押えが該ダイカスト製品に対してスライド移動可能に構成されているダイカスト金型において、該湯押えの該製品対向面には該スライド方向に対する抜き勾配が設けられていることを特徴とするダイカスト金型。   There is a fixed mold and a movable mold that is movable with respect to the fixed mold and defines a cavity together with the fixed mold, and the molten metal supplied from the injection sleeve flows into the cavity when the hot metal is pressed, and the die-cast product is cast. In a die-casting die configured to be slidable with respect to the die-cast product after casting, a draft angle with respect to the sliding direction is provided on the product-facing surface of the presser foot. Die-casting mold characterized by being made. 該湯押えの製品対向面は該製品のビスケット部対向面とランナー部対向面とを有し、該ビスケット部対向面と該ランナー部対向面とを同一の抜き勾配としたことを特徴とする請求項１記載のダイカスト金型。   The product facing surface of the hot water presser has a biscuit facing surface and a runner facing surface of the product, and the biscuit facing surface and the runner facing surface have the same draft. Item 2. A die-casting die according to item 1. 該ランナー部対向面の抜き勾配を該ビスケット部対向面の抜き勾配よりも大きくしたことを特徴とする請求項２記載のダイカスト金型。
3. The die casting mold according to claim 2, wherein a draft angle of the runner portion facing surface is made larger than a draft angle of the biscuit portion facing surface.
JP2017051152A 2017-03-16 2017-03-16 Die casting mold Ceased JP6487479B2 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009090357A (en) * 2007-10-11 2009-04-30 Ahresty Corp Die-casting die
JP2014065057A (en) * 2012-09-26 2014-04-17 Ryobi Ltd Flow divider and die cast method using this flow divider

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009090357A (en) * 2007-10-11 2009-04-30 Ahresty Corp Die-casting die
JP2014065057A (en) * 2012-09-26 2014-04-17 Ryobi Ltd Flow divider and die cast method using this flow divider

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