JPH1119761A - Die for die casting - Google Patents
Die for die castingInfo
- Publication number
- JPH1119761A JPH1119761A JP17591197A JP17591197A JPH1119761A JP H1119761 A JPH1119761 A JP H1119761A JP 17591197 A JP17591197 A JP 17591197A JP 17591197 A JP17591197 A JP 17591197A JP H1119761 A JPH1119761 A JP H1119761A
- Authority
- JP
- Japan
- Prior art keywords
- die
- casting
- hole
- mold
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はダイカスト用金型、
特に、固定型と、その固定型と協働して鋳物成形用キャ
ビティを形成する可動型と、前記固定型に設けられて鋳
物に、それを貫通する鋳抜き孔を成形するピン状固定中
子とを備えたダイカスト用金型に関する。TECHNICAL FIELD The present invention relates to a die casting mold,
In particular, a fixed mold, a movable mold that forms a casting molding cavity in cooperation with the fixed mold, and a pin-shaped fixed core that is provided in the fixed mold and that forms a cast hole passing through the casting. The present invention relates to a die-casting mold having:
【０００２】[0002]
【従来の技術】従来、固定中子の先端面と可動型のキャ
ビティ形成面とは、型締め終了時において相互に密着す
るように構成されている。2. Description of the Related Art Conventionally, the tip surface of a fixed core and the cavity forming surface of a movable mold are configured to be in close contact with each other at the end of mold clamping.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、ダイカ
ストにおいては溶湯の射出圧が高いことから固定中子の
先端面と可動型のキャビティ形成面との間に溶湯が浸入
して、鋳物の鋳抜き孔の孔縁に内向きのばりが発生し易
い。そのため、ばり取り加工が必須となり、それに応じ
て工数も増加することから製品の生産コスト増を招来す
る、という問題があった。However, since the injection pressure of the molten metal is high in the die casting, the molten metal penetrates between the front end surface of the fixed core and the cavity forming surface of the movable die, and a casting hole of the casting is formed. Inward burrs are likely to occur at the edge of the hole. For this reason, there is a problem that deburring is indispensable, and the number of man-hours increases accordingly, which leads to an increase in product production cost.
【０００４】[0004]
【課題を解決するための手段】本発明は、鋳抜き孔の孔
縁に発生したばりを型開き過程で除去し得るようにした
前記ダイカスト用金型を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a die casting die capable of removing burrs generated at the edge of a cast hole in a mold opening process.
【０００５】前記目的を達成するため本発明によれば、
固定型と、その固定型と協働して鋳物成形用キャビティ
を形成する可動型と、前記固定型に設けられて鋳物に、
それを貫通する鋳抜き孔を成形するピン状固定中子とを
備えたダイカスト用金型において、前記可動型に鋳抜き
孔用ばり取りピンを、そのばり取りピンがキャビティ形
成面より没した没入位置と前記キャビティ形成面より突
き出た突出位置との間を往復動し得るように設け、前記
ばり取りピンは、型締め終了時には前記固定中子との当
接により前記没入位置に在り、一方、型開き過程では前
記鋳抜き孔の孔縁に存するばりを除去しながらその鋳抜
き孔内に嵌入して前記突出位置に至るダイカスト用金型
が提供される。[0005] To achieve the above object, according to the present invention,
A fixed mold, a movable mold that forms a casting molding cavity in cooperation with the fixed mold, and a casting provided in the fixed mold,
In a die casting mold having a pin-shaped fixed core for forming a cast hole passing therethrough, the movable mold is provided with a deburring pin for the cast hole, and the deburring pin is recessed from the cavity forming surface. Provided so as to be able to reciprocate between a position and a protruding position protruding from the cavity forming surface, and the deburring pin is at the retracted position by contact with the fixed core at the end of mold clamping, In the mold opening process, a die for die casting is provided which fits into the hole while removing the burrs existing at the edge of the hole and reaches the projecting position.
【０００６】前記のように構成すると、鋳抜き孔の孔縁
に存するばりを、型開き過程でばり取りピンにより剪断
除去することが可能である。[0006] With the above-described structure, it is possible to remove the burrs existing at the edge of the cast hole by the deburring pin in the mold opening process.
【０００７】[0007]
【発明の実施の形態】図１において、鋳物、例えばＡｌ
合金よりなる鋳物１は、円盤部２と、その円盤部２の一
方の端面中心部分から真直ぐに突出するテーパ軸状部３
とよりなり、また円盤部２およびテーパ軸状部３を貫通
する鋳抜き孔４を有する。テーパ軸状部３においては、
その大径端側が円盤部２に連設されており、その小径端
側の鋳抜き孔４の孔縁５に、この場合の鋳造方案に起因
して、内向きのばりが発生し易い。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG.
A casting 1 made of an alloy includes a disk portion 2 and a tapered shaft portion 3 which projects straight from the center of one end face of the disk portion 2.
And a cast hole 4 penetrating through the disk portion 2 and the tapered shaft portion 3. In the tapered shaft portion 3,
The large-diameter end is connected to the disk portion 2, and inward burrs are likely to occur at the hole edge 5 of the casting hole 4 on the small-diameter end due to the casting method in this case.
【０００８】図２に示すダイカスト用金型６は、鋳物１
の鋳造に用いられて前記内向きのばりを除去し得る機能
を持つ。金型６は固定型７と、その固定型７と協働して
鋳物成形用キャビティ８（図３参照）を形成する可動型
９と、固定型７に設けられて鋳物１に、それを貫通する
鋳抜き孔４を成形するピン状固定中子１０を備えてい
る。The die casting die 6 shown in FIG.
It has a function of removing the inward burrs used for casting. The mold 6 includes a fixed mold 7, a movable mold 9 which cooperates with the fixed mold 7 to form a casting molding cavity 8 (see FIG. 3), and a fixed mold 7 provided to penetrate the casting 1. And a pin-shaped fixed core 10 for forming a cast hole 4 to be formed.
【０００９】固定中子１０は、ピン状主体部１１と、そ
の一端に設けられて主体部１１よりも大径のストッパ部
１２とよりなる。ピン状主体部１１は固定型７の保持孔
１３を貫通して、合せ面１４と同一平面上に在るキャビ
ティ形成面１５より突出し、ストッパ部１２は、保持孔
１３とそれよりも大径のねじ孔１６との段部１７に当接
する。ねじ孔１６に２個の固定ねじ１８が螺着されてス
トッパ部１２に当接し、これにより固定中子１０が固定
型７に不動に保持される。ピン状主体部１１の突出長さ
ａは鋳物１の鋳抜き孔４の長さｂに略等しい（ａ≒
ｂ）。The fixed core 10 includes a pin-shaped main body 11 and a stopper 12 provided at one end thereof and having a diameter larger than that of the main body 11. The pin-shaped main portion 11 penetrates through the holding hole 13 of the fixed mold 7 and protrudes from the cavity forming surface 15 which is on the same plane as the mating surface 14. The stopper portion 12 has the holding hole 13 and the larger diameter. It contacts the step 17 with the screw hole 16. Two fixing screws 18 are screwed into the screw holes 16 and abut against the stopper portion 12, whereby the fixed core 10 is immovably held by the fixed mold 7. The protruding length a of the pin-shaped main portion 11 is substantially equal to the length b of the cast hole 4 of the casting 1 (a ≒).
b).
【００１０】可動型９において、その合せ面１９に円盤
部成形用円形凹部２０が開口し、またその円形凹部２０
の底面にテーパ軸状部成形用テーパ孔部２１の大径端側
が開口する。この場合、凹部２０およびテーパ孔部２１
の内面全体がキャビティ成形面２２である。In the movable mold 9, a circular recess 20 for forming a disk portion is opened in the mating surface 19, and the circular recess 20 is formed.
The large-diameter end side of the tapered hole portion 21 for forming a tapered shaft portion is opened at the bottom surface of the tapered shaft portion. In this case, the recess 20 and the tapered hole 21
Is an entire cavity molding surface 22.
【００１１】可動型９に鋳抜き孔用ばり取りピン２３
が、固定中子１０と同軸上に位置するように設けられて
いる。そのばり取りピン２３は、固定中子１０のピン状
主体部１１と同径のピン状主体部２４と、その一端に設
けられて主体部２４よりも大径のストッパ部２５とより
なる。ピン状主体部２４は、可動型９の摺動孔２６を貫
通してテーパ孔部２１の小径端側の底面２７、つまりキ
ャビティ形成面２２より突出し、ストッパ部２５は摺動
孔２６とそれよりも大径のねじ孔２８との段部２９に当
接する。ねじ孔には２個の固定ねじ３０が螺着され、そ
の一方の固定ねじ１８とストッパ部２５との間にばね、
この例では複数の皿ばね３１が圧縮状態で配置される。
これにより、ばり取りピン２３は常時ばね力でテーパ孔
部２１の底面２７より突き出た位置、つまり突出位置側
へ付勢されている。一方、ばね取りピン２３をばね力に
抗して摺動孔２６内に押込むことにより、そのばり取り
ピン２３はテーパ孔部２１の底面２７より没した没入位
置に至る。このようにばり取りピン２３は突出位置と没
入位置との間を往復動することができる。The movable die 9 is provided with a deburring pin 23 for a casting hole.
Are provided so as to be coaxial with the fixed core 10. The deburring pin 23 includes a pin-shaped main portion 24 having the same diameter as the pin-shaped main portion 11 of the fixed core 10, and a stopper portion 25 provided at one end thereof and having a larger diameter than the main portion 24. The pin-shaped main portion 24 penetrates through the sliding hole 26 of the movable die 9 and protrudes from the bottom surface 27 on the small diameter end side of the tapered hole portion 21, that is, the cavity forming surface 22. Also comes into contact with the step 29 with the large diameter screw hole 28. Two fixing screws 30 are screwed into the screw holes, and a spring is provided between one of the fixing screws 18 and the stopper 25.
In this example, a plurality of disc springs 31 are arranged in a compressed state.
Accordingly, the deburring pin 23 is constantly urged by a spring force to a position protruding from the bottom surface 27 of the tapered hole portion 21, that is, to a protruding position side. On the other hand, when the spring removing pin 23 is pushed into the sliding hole 26 against the spring force, the deburring pin 23 reaches the immersion position which is sunk from the bottom surface 27 of the tapered hole 21. Thus, the deburring pin 23 can reciprocate between the protruding position and the immersing position.
【００１２】鋳物１の鋳造に当っては、図２の型開き状
態から、先ず、図３に示すように可動型９を固定型７に
向け前進させて型締めを行う。この型締め過程では、相
対的に固定中子１０が可動型９の円形凹部２０およびテ
ーパ孔部２１を貫通する状態となって、その先端面に、
突出位置に至るばり取りピン２３の先端面が当接する
と、そのばり取りピン２３のそれ以上の前進が妨げら
れ、型締め終了時には固定中子１０の先端面がテーパ孔
部２１の底面２７と同一面上に在り、またばり取りピン
２３は、各皿ばね３１を圧縮した状態で没入位置に在
る。これにより、ばり取りピン２１の先端面はキャビテ
ィ形成面２２の一部を構成し、したがって固定中子１０
の先端面とキャビティ形成面２２とは従来同様に相互に
密着した状態となる。In casting the casting 1, from the mold opening state in FIG. 2, first, the movable mold 9 is advanced toward the fixed mold 7 as shown in FIG. In this mold clamping process, the fixed core 10 relatively penetrates through the circular concave portion 20 and the tapered hole portion 21 of the movable mold 9,
When the leading end surface of the deburring pin 23 reaching the protruding position abuts, further advance of the deburring pin 23 is hindered. The deburring pin 23 is on the same plane, and is at the immersion position with each disc spring 31 compressed. As a result, the tip end surface of the deburring pin 21 forms a part of the cavity forming surface 22, and therefore, the fixed core 10
And the cavity forming surface 22 are in close contact with each other as in the conventional case.
【００１３】次いで、図４に示すようにキャビティ８に
Ａｌ合金の溶湯を加圧下で充填し凝固させて鋳物１を鋳
造する。この鋳物１には固定中子１０により鋳抜き孔４
が成形され、同時に固定中子１０先端面とキャビティ形
成面２２との間に溶湯が浸入するため鋳抜き孔４の孔縁
５に内向きのばり３２が発生する。Next, as shown in FIG. 4, a molten metal of an Al alloy is filled in the cavity 8 under pressure and solidified to cast a casting 1. The casting 1 is provided with a cast hole 4 by a fixed core 10.
Is formed, and at the same time, the molten metal infiltrates between the front end surface of the fixed core 10 and the cavity forming surface 22, so that an inward flash 32 is generated at the hole edge 5 of the cast hole 4.
【００１４】その後、図５に示すように可動型９を固定
型７より後退させて型開きを行う。この型開き過程で
は、鋳物１は可動型９に付着しているので、可動型９の
後退に伴いばり取りピン２３がばね力により前進して鋳
抜き孔４の孔縁５に存する内向きのばり３２を除去しな
がら鋳抜き孔４内に嵌入して突出位置に至る。型開き終
了後、鋳物１は図示しない押出しピンにより離型され
る。Thereafter, as shown in FIG. 5, the movable mold 9 is retracted from the fixed mold 7 to open the mold. In the mold opening process, since the casting 1 adheres to the movable mold 9, the deburring pin 23 advances by the spring force with the retreat of the movable mold 9, and the inward direction existing at the hole edge 5 of the cast hole 4. The burrs 32 are inserted into the cast holes 4 while removing the burrs 32 to reach the projecting position. After the mold opening is completed, the casting 1 is released by an extrusion pin (not shown).
【００１５】[0015]
【発明の効果】本発明によれば、前記のように構成する
ことによって、鋳抜き孔の孔縁に存するばりを型開き過
程で除去することが可能なダイカスト用金型を提供する
ことができる。According to the present invention, with the above-described structure, it is possible to provide a die casting die capable of removing burrs existing at the hole edge of the cast hole in the mold opening process. .
【図１】鋳物の拡大断面図である。FIG. 1 is an enlarged sectional view of a casting.
【図２】ダイカスト用金型の型開き状態を示す断面図で
ある。FIG. 2 is a cross-sectional view illustrating a die-opening state of a die casting mold.
【図３】ダイカスト用金型の型締め終了状態を示す断面
図である。FIG. 3 is a cross-sectional view illustrating a die-casting mold in a state where mold clamping is completed.
【図４】ダイカスト用金型の鋳込み終了状態を示す要部
拡大断面図である。FIG. 4 is an enlarged cross-sectional view of a main part showing a finished state of casting of a die casting mold.
【図５】ダイカスト用金型の型開き過程の断面図であ
る。FIG. 5 is a cross-sectional view of a die-casting mold during a mold opening process.
１ 鋳物 ４ 鋳抜き孔 ５ 孔縁 ６ 金型 ７ 固定型 ８ キャビティ ９ 可動型 １０ 固定中子 ２２ キャビティ形成面 ２３ ばり取りピン ３２ ばり DESCRIPTION OF SYMBOLS 1 Casting 4 Casting hole 5 Hole edge 6 Die 7 Fixed die 8 Cavity 9 Movable die 10 Fixed core 22 Cavity forming surface 23 Deburring pin 32 Burr
Claims (2)
働して鋳物成形用キャビティ（８）を形成する可動型
（９）と、前記固定型（７）に設けられて鋳物（１）
に、それを貫通する鋳抜き孔（４）を成形するピン状固
定中子（１０）とを備えたダイカスト用金型において、
前記可動型（９）に鋳抜き孔用ばり取りピン（２３）
を、そのばり取りピン（２３）がキャビティ形成面（２
２）より没した没入位置と前記キャビティ形成面（２
２）より突き出た突出位置との間を往復動し得るように
設け、前記ばり取りピン（２３）は、型締め終了時には
前記固定中子（１０）との当接により前記没入位置に在
り、一方、型開き過程では前記鋳抜き孔（４）の孔縁
（５）に存するばり（３２）を除去しながらその鋳抜き
孔（４）内に嵌入して前記突出位置に至ることを特徴と
するダイカスト用金型。1. A fixed mold (7), a movable mold (9) for forming a casting molding cavity (8) in cooperation with the fixed mold (7), and a movable mold (7) provided in the fixed mold (7). Casting (1)
And a pin-shaped fixed core (10) for forming a cast hole (4) penetrating therethrough.
Deburring pin (23) for cast hole in the movable die (9)
The deburring pin (23) is provided on the cavity forming surface (2).
2) The immersion position and the cavity forming surface (2
2) provided so as to be able to reciprocate between a protruding position further protruding, and the deburring pin (23) being in the retracted position by contact with the fixed core (10) at the end of mold clamping; On the other hand, during the mold opening process, the burrs (32) existing at the hole edges (5) of the pierced hole (4) are removed and fitted into the pierced hole (4) to reach the projecting position. Die casting mold.
って前記突出位置側に付勢されている、請求項１記載の
ダイカスト用金型。2. The die casting die according to claim 1, wherein the deburring pin is constantly biased toward the projecting position by a spring force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17591197A JP3393793B2 (en) | 1997-07-01 | 1997-07-01 | Die casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17591197A JP3393793B2 (en) | 1997-07-01 | 1997-07-01 | Die casting mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1119761A true JPH1119761A (en) | 1999-01-26 |
| JP3393793B2 JP3393793B2 (en) | 2003-04-07 |
Family
ID=16004408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17591197A Expired - Fee Related JP3393793B2 (en) | 1997-07-01 | 1997-07-01 | Die casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3393793B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2434114A (en) * | 2005-05-24 | 2007-07-18 | Tsubakimoto Chain Co | Method of die casting an aluminium base frame for a transmission device |
| US7287572B2 (en) | 2005-05-24 | 2007-10-30 | Tsubakimoto Chain Co. | Method for die casting an aluminum base frame used in a transmission device |
| KR101509341B1 (en) * | 2013-09-30 | 2015-04-07 | 와이케이케이 가부시끼가이샤 | Die casting machine |
-
1997
- 1997-07-01 JP JP17591197A patent/JP3393793B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2434114A (en) * | 2005-05-24 | 2007-07-18 | Tsubakimoto Chain Co | Method of die casting an aluminium base frame for a transmission device |
| US7287572B2 (en) | 2005-05-24 | 2007-10-30 | Tsubakimoto Chain Co. | Method for die casting an aluminum base frame used in a transmission device |
| GB2434114B (en) * | 2005-05-24 | 2008-07-02 | Tsubakimoto Chain Co | Method for die casting an aluminium base frame used in a transmission device |
| KR101509341B1 (en) * | 2013-09-30 | 2015-04-07 | 와이케이케이 가부시끼가이샤 | Die casting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3393793B2 (en) | 2003-04-07 |
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