JP3139260B2 - Mold structure - Google Patents
Mold structureInfo
- Publication number
- JP3139260B2 JP3139260B2 JP06017423A JP1742394A JP3139260B2 JP 3139260 B2 JP3139260 B2 JP 3139260B2 JP 06017423 A JP06017423 A JP 06017423A JP 1742394 A JP1742394 A JP 1742394A JP 3139260 B2 JP3139260 B2 JP 3139260B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- cavity
- sand
- projection
- protrusion
- 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.)
- Expired - Fee Related
Links
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は鋳型構造に関し、特にバ
リ無し鋳造を行うために用いられる鋳型構造に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold structure, and more particularly to a mold structure used for performing flashless casting.
【０００２】[0002]
【従来の技術】従来、複数の砂型よりなる鋳造砂型は砂
型の合わせ面付近で起きる砂型合わせ不良を原因とする
押し込み不良が起きるため、実際には砂型のキャビティ
周囲の合わせ面の間には若干の隙間が設けられている。
このため溶湯がキャビティからこの隙間を介して外部へ
流出し固化してバリが発生し、このバリを取り除くため
鋳造後製品のバリ取り工程を必要としていた。そこで図
１１に示されるように一方の砂型１０１に設けられる突
起部１０４と、他方の砂型１０２にその突起部１０４に
対応した位置に突起部１０４よりも大きい容積を有し且
つその突出高さよりも浅い凹みを有する空隙部１０５と
から形成される砂型構造を用い、バリの発生を抑制した
技術が実開昭６２−９２０４４に開示されている。この
技術は、２つの砂型部材を合わせてキャビティを構成す
る際には一方の砂型の突起部１０４の先端部１０４ａが
他方の砂型１０２の空隙部１０５の底に当たりそれによ
って先端部１０４ａがつぶされる、というものであっ
た。つぶされた先端部１０４ａの砂は２つの砂型部材の
隙間を塞ぐためシール性が向上され、湯漏れの発生ひい
てはバリの発生を防止することが可能となる。2. Description of the Related Art Conventionally, in a casting sand mold comprising a plurality of sand molds, indentation failure occurs due to poor sand mold alignment occurring near the mating surfaces of the sand molds. Is provided.
For this reason, the molten metal flows out of the cavity through the gap to the outside and solidifies, and burrs are generated. In order to remove the burrs, a step of removing burrs from the product after casting has been required. Therefore, as shown in FIG. 11, the protrusion 104 provided on one sand mold 101 and the other sand mold 102 have a larger volume than the protrusion 104 at a position corresponding to the protrusion 104 and have a height higher than the height of the protrusion. Japanese Utility Model Application Laid-Open Publication No. Sho 62-92044 discloses a technique in which a burr is suppressed by using a sand-type structure formed by a void portion 105 having a shallow dent. According to this technique, when the two sand mold members are combined to form a cavity, the tip 104a of the protrusion 104 of one sand mold hits the bottom of the cavity 105 of the other sand mold 102, thereby crushing the tip 104a. It was that. The crushed sand at the tip portion 104a closes the gap between the two sand mold members, so that the sealing property is improved and the occurrence of hot water leakage and the occurrence of burrs can be prevented.
【０００３】[0003]
【発明が解決しようとする課題】しかしながらこの鋳型
構造では、型閉め時突起部１０４と空隙部１０５を確実
に噛み合わせる必要がある。何故ならば突起部１０４と
空隙部１０５が適切に噛み合わされない場合突起部１０
４の崩れた砂が空隙部１０５に入らず図示しないキャビ
ティ内に侵入して鋳造欠陥を起こす可能性があるためで
ある。このため突起部１０４、空隙部１０５それぞれの
精度と、これらの噛み合わせの精度を高めることが必要
となって、鋳型製造時ならびに型合わせ時のコストが高
くなるという問題点があった。However, in this mold structure, it is necessary to ensure that the projection 104 and the gap 105 are engaged with each other when the mold is closed. If the protrusion 104 and the gap 105 are not properly engaged with each other, the protrusion 10
This is because the broken sand of 4 may not enter the gap 105 but enter a cavity (not shown) to cause a casting defect. For this reason, it is necessary to increase the accuracy of each of the projection 104 and the gap 105 and the accuracy of their engagement, and there has been a problem in that the cost in manufacturing the mold and in matching the mold is increased.
【０００４】本発明は前述の問題点に鑑みてなされたも
のであり、型閉め時の突起部と空隙部をともに同じ側の
砂型に設けることにより突起部と空隙部との間の距離を
常に一定として崩れた砂を空隙部に確実に入れることに
より、型閉め時の型合わせ精度を向上させる必要なく好
適にバリ及び鋳造欠陥の無い砂型構造を得ることを課題
とするものである。[0004] The present invention has been made in view of the above-mentioned problems, and the distance between the protrusion and the gap is always maintained by providing the protrusion and the gap at the same time when the mold is closed. It is an object of the present invention to obtain a sand mold structure free of burrs and casting defects without the necessity of improving the mold matching accuracy at the time of mold closing by surely putting collapsed sand into a void portion.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
の請求項１記載の発明に係る鋳型構造は、複数の砂型か
らなり砂型を互いに接近する方向に所定量移動させ、複
数の砂型を合わせることによりキャビティを形成する鋳
造用鋳型であって、一方の砂型にはキャビティ周囲の所
定位置に突設される突起部と、突起部に対しキャビティ
と反対側の周囲に凹設される空隙部とが備えられるとと
もに、突起部と空隙部とは連続的に形成されていること
を特徴とするものである。[MEANS FOR SOLVING THE PROBLEMS]
The cast structure according to the invention of claim 1, wherein the, toward each other the sand mold comprises a plurality of sand mold is moved by a predetermined amount, a casting mold to form a cavity by combining a plurality of sand molds, whereas The sand mold has a projection protruding at a predetermined position around the cavity, and a cavity recessed around the projection on the side opposite to the cavity, and the projection and the cavity are continuous. It is characterized by being formed in.
【０００６】そして、突起部は、突起部の断面の底辺が
砂型の型閉め方向から、しかも砂型の型閉め方向と垂直
な面に投影された線分の垂直二等分線よりもキャビティ
と反対側に断面の重心が偏心されていることを特徴とす
るものである。[0006] Then, collision electromotive unit from the mold closing direction of the base are sand-shaped cross-section of the protrusion, yet the cavity than the perpendicular bisector of the line segment projected on the mold-closing direction and a plane perpendicular sand type The center of gravity of the cross section is eccentric on the opposite side.
【０００７】また請求項２記載の発明に係る鋳型構造
は、請求項１の鋳型構造において、一方の砂型に対向し
て配置されるとともにキャビティの周囲の所定位置に突
設される突起部を有する他方の砂型を備えてなることを
特徴とするものである。[0007] microstrip structure according to the invention of claim 2 Symbol placement was protrusions, which protrude in the mold structure according to claim 1, at a predetermined position around the cavity while being arranged opposite to one sand mold The other sand mold having a portion is provided.
【０００８】[0008]
【作用】本発明の請求項１の鋳型構造の作用を以下に示
す。複数の砂型を互いに接近する方向に移動させて型閉
めを行う。この時型閉めの力により一方の砂型のキャビ
ティ周囲に設けられる砂からなる突起部は、対向する他
方の砂型の合わせ面に当接し次いで崩壊する。この時崩
壊した砂の一部を上下砂型の合わせ面の隙間に侵入さ
せ、また崩壊した余分な砂の残部を突起部と連続して設
けられる空隙部に収納させる。型閉めの終了後に溶湯を
キャビティ内に充填させるが、前述の崩壊した砂が上下
砂型の間の隙間に侵入しているため、溶湯がキャビティ
外部へ流出することを遮断することができる。The operation of the template structure according to claim 1 of the present invention will be described below. The mold is closed by moving a plurality of sand molds in a direction approaching each other. At this time, the protrusion made of sand provided around the cavity of one sand mold by the force of closing the mold comes into contact with the mating surface of the other sand mold and then collapses. At this time, a part of the collapsed sand is caused to enter the gap between the mating surfaces of the upper and lower sand molds, and the remaining surplus collapsed sand is stored in a gap provided continuously with the projection. After the mold is closed, the molten metal is filled into the cavity. However, since the collapsed sand has entered the gap between the upper and lower sand molds, the molten metal can be prevented from flowing out of the cavity.
【０００９】さらに、前記一方の砂型に設けられた突起
部の断面は、この断面の底辺が型閉め方向へ投影された
線分の垂直二等分線よりもキャビティと反対側に断面の
重心が偏心されるように形成されている。この断面の重
心が前述の垂直二等分線の上に配置される形状であれ
ば、砂の崩れ方もこの垂直二等分線に対して対称に崩れ
る。しかし断面の重心がこの垂直二等分線よりもキャビ
ティと反対側に偏心されているため、断面が垂直二等分
線で仕切られる時にキャビティと反対側の部分の方がキ
ャビティ側の部分よりも砂の量が多くなってキャビティ
と反対側に多く崩れる。こうしてキャビティと反対側に
流出する砂の量が多くなる。 Furthermore, the cross section of the protrusion provided on the sand mold of the hand, the cross-section gravity center of the opposite side of the cavity than the perpendicular bisector of the line segment base of this cross-section is projected into the mold-closing direction Are formed to be eccentric. If the center of gravity of this cross section is arranged on the above-mentioned vertical bisector, the way of the collapse of the sand also collapses symmetrically with respect to this vertical bisector. However, since the center of gravity of the cross section is eccentric to the side opposite to the cavity than this vertical bisector, when the cross section is partitioned by the vertical bisector, the part opposite to the cavity is more than the part on the cavity side The amount of sand increases and collapses to the opposite side of the cavity. This increases the amount of sand flowing out of the cavity.
【００１０】また請求項２記載の発明に係る鋳型構造の
作用を以下に示す。型閉めの際、型閉めの力によりキャ
ビティの周辺に設けられた突起部は崩壊する。この時一
方の突起部は上型と当接し他方の突起部は下型と当接し
て型閉めされるため、溶湯がキャビティ外へ流出しよう
とする経路が長くなり、溶湯がキャビティ外へ流出する
ことを防ぐことができる。[0010] below the effect of cast structure according to the second aspect of the present invention. At the time of closing the mold, the projection provided around the cavity collapses due to the force of closing the mold. At this time, one protrusion comes into contact with the upper mold and the other protrusion comes into contact with the lower mold, and the mold is closed. Therefore, the path for the molten metal to flow out of the cavity becomes longer, and the molten metal flows out of the cavity. Can be prevented.
【００１１】[0011]
【実施例】本発明の第１実施例を以下に示す。図１は本
発明の鋳型構造の一部であり型合わせ前の断面図を示し
ている。１は上型、２は上型１に対向して配置される下
型２である。上型１と下型２は図１の上下方向に図示し
ない駆動手段にて移動可能であり、必要に応じて型開
き、型閉めを行うことができる。３は型閉め後に溶湯を
侵入させるキャビティ、４はキャビティ３の周囲に設け
られるＶ字型の突起部、４ａは突起部４の先端部、５は
突起部４に対しキャビティ３と反対側に突起部４と連続
的に設けられた空隙部である。また図２は図１の状態か
ら上型１と下型２を互いに接近させて型合わせした後の
鋳型構造を示している。４ｄは型閉めの際に突起部４が
崩れた崩壊部、９は鋳造時に型合わせ不良を原因として
起きる押し込み不良を防止するために上型１と下型２の
間のキャビティ３周辺に設けられる隙間である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below. FIG. 1 is a cross-sectional view showing a part of a mold structure according to the present invention and before mold matching. Reference numeral 1 denotes an upper mold 2 and reference numeral 2 denotes a lower mold 2 arranged to face the upper mold 1. The upper mold 1 and the lower mold 2 can be moved in the vertical direction in FIG. 1 by a driving means (not shown), and the mold can be opened and closed as necessary. Reference numeral 3 denotes a cavity into which the molten metal enters after the mold is closed, 4 denotes a V-shaped projection provided around the cavity 3, 4a denotes a tip of the projection 4, and 5 denotes a projection opposite to the cavity 3 with respect to the projection 4. It is a gap provided continuously with the portion 4. FIG. 2 shows a mold structure after the upper mold 1 and the lower mold 2 have been brought close to each other from the state of FIG. Reference numeral 4d denotes a collapsed portion in which the protrusion 4 has collapsed when the mold is closed, and 9 denotes a portion provided around the cavity 3 between the upper mold 1 and the lower mold 2 in order to prevent a push-in failure caused by a mold misalignment during casting. It is a gap.
【００１２】図１及び図２を用いて本発明の第１実施例
の作用を以下に示す。鋳造する際まず上型１と下型２を
図１の状態から互いに接近する方向に所定距離移動させ
る。この時上型１と下型２は、少なくともいずれか一方
が図示しない駆動手段により図１上下方向に移動する。
所定の距離移動すると突起部４の先端部４ａが下型２に
当接する。当接後も更に上型１と下型２を接近する方向
に力をかけることで突起部４をこの型閉めの力により崩
壊させて、図２のように突起部４の当接部位と下型２と
の隙間が０となり、崩れた砂が空隙部５に収納された状
態となる。この時突起部４と空隙部５は一方の上型１に
連続的に配置されているため、上型１と下型２の型合わ
せの精度によらず突起部４と空隙部５との相対位置は常
に一定である。このため崩壊された砂は確実に空隙部５
に収納される。また突起部４が下型２に当接し次いで崩
壊するため上型１と下型２の間に押し込み不良防止のた
めの隙間９が設けられていても突起部４の崩壊部分付近
で溶湯は遮断される。The operation of the first embodiment of the present invention will be described below with reference to FIGS. At the time of casting, first, the upper mold 1 and the lower mold 2 are moved from the state of FIG. At this time, at least one of the upper mold 1 and the lower mold 2 is moved in the vertical direction in FIG.
After a predetermined distance, the tip 4a of the projection 4 comes into contact with the lower die 2. After the contact, the upper mold 1 and the lower mold 2 are further subjected to a force in a direction of approaching to break the projection 4 by the closing force of the mold, and as shown in FIG. The gap with the mold 2 becomes 0, and the collapsed sand is stored in the gap 5. At this time, since the projection 4 and the gap 5 are continuously arranged on one upper mold 1, the relative position between the projection 4 and the gap 5 is independent of the accuracy of the alignment of the upper mold 1 and the lower mold 2. The position is always constant. Therefore, the collapsed sand is sure to be
Is stored in. Further, since the projection 4 comes into contact with the lower mold 2 and then collapses, even if a gap 9 is provided between the upper mold 1 and the lower mold 2 to prevent poor press-fitting, the molten metal is shut off near the collapsed portion of the projection 4. Is done.
【００１３】次に本発明の第２実施例を以下に示す。図
３は図１に示された突起部４の拡大図である。図の左側
がキャビティ側を示す。αはキャビティ側の突起部の底
部の角度、βは反キャビティ側の突起部の底部の角度を
表しておりαとβの大小関係はα＜βと設定である。こ
の実施例ではα＝４５°、β＝６０°と設定している。
Ｈは突起部４の合わせ面方向の底辺ＡＢの垂直二等分線
を示し、Ｇは突起部４の重心を示している。図４は本発
明の第２実施例の突起部４との比較例であり、合わせ面
方向の底辺ＣＤの垂直二等分線Ｉ上に重心ｇがある場合
を示している。Next, a second embodiment of the present invention will be described below. FIG. 3 is an enlarged view of the protrusion 4 shown in FIG. The left side of the figure shows the cavity side. α represents the angle of the bottom of the protrusion on the cavity side, and β represents the angle of the bottom of the protrusion on the opposite side of the cavity. The magnitude relationship between α and β is set to α <β. In this embodiment, α = 45 ° and β = 60 °.
H indicates the perpendicular bisector of the bottom AB in the direction of the mating surface of the projection 4, and G indicates the center of gravity of the projection 4. FIG. 4 is a comparative example with the protrusion 4 of the second embodiment of the present invention, and shows a case where the center of gravity g is on the perpendicular bisector I of the bottom CD in the direction of the mating surface.
【００１４】図３を用いて本発明の第２実施例の作用を
以下に示す。型閉め時上型１と下型２を接近する方向に
移動させると所定距離移動した後、突起部４の先端部４
ａが下型２に当接し、更に接近させることによって突起
部４は崩壊する。ここで比較例として示した図４のよう
に突起部４の合わせ面方向の底辺ＣＤの垂直二等分線上
に重心ｇがある場合、この垂直二等分線により仕切られ
る断面のキャビティ側Ｒとキャビティと反対側Ｓの砂の
量は同じであるため、砂の崩れ方も垂直二等分線の左右
で対称となる。The operation of the second embodiment of the present invention will be described below with reference to FIG. When the upper mold 1 and the lower mold 2 are moved in the approaching direction at the time of closing the mold, they move a predetermined distance,
The protrusion 4 collapses as a comes into contact with the lower mold 2 and further approaches. Here, as shown in FIG. 4 as a comparative example, when the center of gravity g is on the vertical bisector of the bottom CD in the direction of the mating surface of the projection 4, the cavity side R of the cross section partitioned by the vertical bisector Since the amount of sand on the opposite side S from the cavity is the same, the manner of collapse of the sand is also symmetric on the left and right sides of the perpendicular bisector.
【００１５】しかしながら図３に示した突起形状の場
合、突起部４の重心Ｇは突起部４の合わせ面方向の底辺
ＡＢの垂直二等分線よりもキャビティ３と反対方向に偏
心されているため、垂直二等分線Ｈで仕切られるキャビ
ティと反対側の面積Ｐはキャビティ側の面積Ｑよりも大
きい。すなわちキャビティと反対側の方がキャビティ側
よりも砂の量が多い。このためキャビティと反対側に崩
れる砂の量がキャビティ側へ崩れる砂の量よりも多くな
る。こうしてキャビティ３内に砂が侵入することが低減
されるため鋳造欠陥することなく好適に鋳造を行うこと
が可能となる。However, in the case of the projection shape shown in FIG. 3, the center of gravity G of the projection 4 is eccentric in the direction opposite to the cavity 3 with respect to the perpendicular bisector of the bottom AB in the direction of the mating surface of the projection 4. The area P on the side opposite to the cavity divided by the perpendicular bisector H is larger than the area Q on the cavity side. That is, the amount of sand on the side opposite to the cavity is larger than that on the cavity side. Therefore, the amount of sand that collapses to the side opposite to the cavity becomes larger than the amount of sand that collapses to the cavity side. In this way, the intrusion of sand into the cavity 3 is reduced, so that casting can be suitably performed without casting defects.
【００１６】また第２実施例では突起部の形状は三角形
であるが、三角形に限定されるものではなく、この他の
例として突起部４の先端部４ａが丸くなっている略三角
形の形状や、図５のように曲線的な突設部を備えるもの
を用いることも可能である。In the second embodiment, the shape of the projection is triangular. However, the shape is not limited to a triangle. As another example, a substantially triangular shape in which the tip 4a of the projection 4 is round or As shown in FIG. 5, it is also possible to use one having a curved projecting portion.
【００１７】更に第２実施例では合わせ面に対して垂直
に型閉めが行われるものであるが、これに限定されるも
のではない。例えば図６は第２実施例の他の形状を示す
ものである。図上下方向が型閉めの方向を示している。
また図７は突起部４の拡大図であり、ＵＶは突起部４の
底辺、ＷＸは底辺ＵＶの合わせ面方向の投影の線分、Ｊ
は線分ＷＸの垂直二等分線、Ｓは垂直二等分線で突起部
４を仕切る時にキャビティ３と反対側の部位、Ｔはキャ
ビティ３側の部位を示す。Further, in the second embodiment, the mold is closed perpendicularly to the mating surface, but the present invention is not limited to this. For example, FIG. 6 shows another shape of the second embodiment. The vertical direction in the figure indicates the direction of closing the mold.
FIG. 7 is an enlarged view of the projection 4, where UV is the bottom of the projection 4, WX is the line segment of the projection of the bottom UV in the mating surface direction, and J
Denotes a vertical bisector of the line segment WX, S denotes a portion on the side opposite to the cavity 3 when the projection 4 is partitioned by the vertical bisector, and T denotes a portion on the cavity 3 side.
【００１８】型閉めの方向が合わせ面に対して垂直でな
い場合は、突起部４の断面の底辺ＵＶが型閉め方向へ投
影される線分ＷＸの垂直二等分線Ｊについてキャビティ
３と反対側にこの断面の重心ｆが偏心されるように突起
部４を形成する。この時この垂直二等分線Ｊによって仕
切られるキャビティ３と反対側の部位Ｓの砂の量は、キ
ャビティ３側の部位Ｔの砂の量よりも多い。このためキ
ャビティ３と反対側に崩れる砂の量がキャビティ３側へ
崩れる砂の量よりも多くなってキャビティ３内に侵入す
る砂の量が低減され、鋳造欠陥することなく好適に鋳造
を行うことができる。If the mold closing direction is not perpendicular to the mating surface, the bottom UV of the cross section of the projection 4 is projected in the mold closing direction on the side opposite to the cavity 3 with respect to the perpendicular bisector J of the line segment WX. The projection 4 is formed such that the center of gravity f of this section is eccentric. At this time, the amount of sand in the portion S on the side opposite to the cavity 3 divided by the vertical bisector J is larger than the amount of sand in the portion T on the cavity 3 side. Therefore, the amount of sand that collapses to the side opposite to the cavity 3 is larger than the amount of sand that collapses to the cavity 3 side, so that the amount of sand that enters the cavity 3 is reduced, and casting is preferably performed without casting defects. Can be.
【００１９】次に本発明の第３実施例を以下に示す。図
８は本発明の第３実施例の型合わせ前の全体構成を示し
ており、６は下型２の合わせ面上且つ突起部４である第
１の突起部に対しキャビティ３と反対側に突設される第
２の突起部である。また図９は図８の鋳型を図示しない
駆動手段にて互いに接近する方向に移動し型合わせした
後の全体構成を示している。Next, a third embodiment of the present invention will be described below. FIG. 8 shows the entire configuration of the third embodiment of the present invention before the mold matching. Reference numeral 6 denotes the mating surface of the lower mold 2 and the side opposite to the cavity 3 with respect to the first projection as the projection 4. This is the second projection that is provided to project. FIG. 9 shows the entire structure after the molds of FIG. 8 have been moved in a direction approaching each other by driving means (not shown) and have been matched.
【００２０】図１０は第３実施例の第１の突起部４と第
２の突起部６、ならびにそれぞれの崩壊する部分の実際
の寸法を示している。上型１に設けられる第１の突起部
４の高さは０．５ｍｍ、空隙部５の深さは０．５ｍｍで
ある。下型２に設けられる第２の突起部６は高さが０．
６ｍｍである。ハッチングで表される部位は型閉め時に
崩壊される部位であり第１の突起部４は先端から０．３
ｍｍ削られ、第１の突起部４に対応する下型２の当接部
位も合わせ面から０．２ｍｍ削られる。同様に型閉め時
に第２の突起部６も先端から０．３ｍｍ削られ、また第
２の突起部６に対応する上型１の当接部分も合わせ面か
ら０．１ｍｍ削られる。FIG. 10 shows the actual dimensions of the first and second projections 4 and 6 of the third embodiment, as well as the respective collapsed portions. The height of the first protrusion 4 provided on the upper mold 1 is 0.5 mm, and the depth of the gap 5 is 0.5 mm. The second protrusion 6 provided on the lower mold 2 has a height of 0.1 mm.
6 mm. The portion represented by hatching is a portion that collapses when the mold is closed, and the first protrusion 4 is 0.3 mm from the tip.
The contact portion of the lower die 2 corresponding to the first protrusion 4 is also cut by 0.2 mm from the mating surface. Similarly, when the mold is closed, the second protrusion 6 is also cut by 0.3 mm from the tip, and the contact portion of the upper mold 1 corresponding to the second protrusion 6 is also cut by 0.1 mm from the mating surface.
【００２１】ここで下型２に設けられる第２の突起部６
は型合わせ時上型に凹設される空隙部５と当接し崩壊し
て溶湯を遮断するため上型１に設けられる第１の突起部
４よりも高さを大きくとることで確実に空隙部５に当接
させている。しかしながら第２の突起部６をあまり高く
すると型閉め時第２の突起部６が上型１に当接してから
第１の突起部４が下型２に当接するため、第２の突起部
６の崩壊した砂が先に空隙部５に収納されることにな
る。このため第１の突起部４の崩壊した砂が空隙部５に
収納しにくくなるおそれがある。本実施では第２の突起
部６の高さを第１の突起部４の高さよりも若干高くし先
に第１の突起部４を崩壊させているため、第１の突起部
４の崩壊した砂を確実に空隙部５に収納することができ
る。Here, the second protrusion 6 provided on the lower mold 2 is provided.
When the mold is set, the height is larger than the first projections 4 provided on the upper mold 1 in order to abut on the gaps 5 formed in the upper mold and to collapse and block the molten metal. 5. However, if the second projection 6 is too high, the second projection 6 contacts the upper mold 1 and then the first projection 4 contacts the lower mold 2 when the mold is closed. The collapsed sand is stored in the gap 5 first. For this reason, there is a possibility that the collapsed sand of the first protrusions 4 becomes difficult to be stored in the gaps 5. In the present embodiment, the height of the second projection 6 is slightly higher than the height of the first projection 4 and the first projection 4 is collapsed first, so that the first projection 4 is collapsed. Sand can be reliably stored in the gap 5.
【００２２】図８及び図９を用いて本発明の第３実施例
の作用を示す。鋳造する際第１実施例と同様に型閉めを
行う。すなわち図６の状態から上型１と下型２が互いに
接近するように図示しない駆動手段を用いて接近させ
る。所定量接近させた後第１の突起部４の先端部４ａが
下型２に当接する。更に上型１と下型２を接近させるこ
とにより第１の突起部４は崩壊し、第２の突起部６も上
型１に当接、次いで崩壊させられる。これによりキャビ
ティ３と合わせ面の間の隙間を遮断する箇所が２つ形成
される。The operation of the third embodiment of the present invention will be described with reference to FIGS. When casting, the mold is closed as in the first embodiment. That is, the upper mold 1 and the lower mold 2 are brought closer to each other from the state shown in FIG. After approaching by a predetermined amount, the tip 4a of the first projection 4 comes into contact with the lower die 2. Further, when the upper mold 1 and the lower mold 2 are brought closer to each other, the first projections 4 are collapsed, and the second projections 6 are also brought into contact with the upper mold 1 and then collapsed. As a result, two locations for blocking the gap between the cavity 3 and the mating surface are formed.
【００２３】キャビティ３に近い第１の遮断箇所７は上
型１に形成された第１の突起部４の崩壊後の残部と下型
２からなり、またキャビティ３から遠い第２の遮断箇所
８は上型１と下型２に形成された第２の突起部６の崩壊
後の残部からなる。つまり第１の遮断箇所７は上型１に
形成された第１の突起部４と下型２で溶湯を遮断し、第
１の遮断箇所７で十分に遮断されない場合は下型２に形
成された第２の突起部６と上型１からなる第２の遮断箇
所８が溶湯を遮断する。こうしてこの鋳型構造を用いる
ことにより、溶湯は合わせ面に対して垂直な方向に相対
距離をおいた位置で遮断され、溶湯がキャビティ３外へ
流出しようとする経路が長くなる。すなわち、流出抵抗
が大きくなる。このため溶湯はキャビティ外に漏れにく
くなりバリが発生することを防ぐことができる。A first cut-off location 7 near the cavity 3 is composed of the remaining portion of the first projection 4 formed on the upper mold 1 after collapse and the lower mold 2, and a second cut-off location 8 far from the cavity 3. Consists of the remaining portions of the second protrusions 6 formed on the upper mold 1 and the lower mold 2 after collapse. In other words, the first blocking portion 7 blocks the molten metal with the first projection 4 formed on the upper die 1 and the lower die 2, and is formed on the lower die 2 when the first blocking portion 7 does not sufficiently block the molten metal. The second blocking portion 8 including the second protrusion 6 and the upper mold 1 blocks the molten metal. Thus, by using this mold structure, the molten metal is cut off at a position at a relative distance in a direction perpendicular to the mating surface, and the path through which the molten metal flows out of the cavity 3 is lengthened. That is, the outflow resistance increases. For this reason, the molten metal is less likely to leak out of the cavity, and the occurrence of burrs can be prevented.
【００２４】尚、本発明の第３実施例には突起部が２つ
の実施例のみを開示したが本発明はこれに限定されるも
のではなく、３つ以上の突起部を備えることで溶湯が流
出する経路を長くして流路抵抗を大きくし、より好適に
バリ無し鋳造を行うことができる。Although the third embodiment of the present invention discloses only the embodiment having two protrusions, the present invention is not limited to this, and the provision of three or more protrusions allows the molten metal to be formed. It is possible to increase the flow path resistance by lengthening the outflow path, and it is possible to more suitably perform the burr-free casting.
【発明の効果】以上詳述したように本発明の請求項１記
載の鋳型構造は、一方の砂型に突起部と、この突起部と
連続的に凹設される空隙部とを備えるため、型合わせの
精度に関係なく確実に崩れた砂を空隙部内に収納するこ
とができる。As described above in detail, in the mold structure according to the first aspect of the present invention, one of the sand molds is provided with a protrusion and a cavity continuously recessed from the protrusion. The broken sand can be reliably stored in the gap regardless of the alignment accuracy.
【００２５】さらに、前記鋳型構造を形成する砂型の突
起部の断面の形状を断面の底辺が型閉め方向へ投影され
た線分の垂直二等分線よりもキャビティと反対側に断面
の重心が偏心されるように構成したため、空隙部内によ
り多くの砂を収納することができる。 Furthermore, the center of gravity of the cross section on the opposite side of the cavity than the perpendicular bisector of the line segment base of sectional shape of the cross section of the protrusion of the sand forming the cast structure is projected into the mold closing direction Is configured to be eccentric, so that more sand can be stored in the gap.
【００２６】また請求項２記載の発明に係る鋳型構造に
よれば、請求項１記載の鋳型構造において突起部が設け
られた一方の砂型に対向して配置される他方の砂型に更
に突起部を突設させたため、溶湯の流出抵抗が大きくな
り溶湯は更にキャビティ外に漏れにくくなる。According to such a cast structure to the present invention or claim 2, further to the other sand mold which is disposed opposite to one of the sand mold which projections are provided in the mold structure according to claim 1 Symbol placement Since the protruding portion is provided, the outflow resistance of the molten metal is increased, and the molten metal is less likely to leak out of the cavity.
【図１】本発明の第１実施例に係わる型合わせ前の砂型
構造の一部構成を示す断面図である。FIG. 1 is a sectional view showing a partial configuration of a sand mold structure before mold matching according to a first embodiment of the present invention.
【図２】本発明の第１実施例に係わる型合わせ後の砂型
構造の一部構成を示す断面図である。FIG. 2 is a cross-sectional view showing a partial configuration of a sand mold structure after mold matching according to the first embodiment of the present invention.
【図３】本発明の第２実施例に係わる型合わせ前の突起
部を示す断面図である。FIG. 3 is a cross-sectional view showing a protrusion before mold matching according to a second embodiment of the present invention.
【図４】本発明の第２実施例の突起部との比較例を示す
断面図である。FIG. 4 is a cross-sectional view showing a comparative example with the protrusion of the second embodiment of the present invention.
【図５】本発明の第２実施例に係わる型合わせ前の突起
部の他の形状を示す断面図である。FIG. 5 is a cross-sectional view showing another shape of the protrusion before mold matching according to the second embodiment of the present invention.
【図６】本発明の第２実施例に係わる型合わせ前の砂型
構造の一部構成の他の形状を示す断面図である。FIG. 6 is a cross-sectional view showing another shape of a partial configuration of a sand mold structure before matching according to a second embodiment of the present invention.
【図７】本発明の第２実施例に係わる型合わせ前の突起
部の他の形状を示す断面図で図６の拡大図である。FIG. 7 is a cross-sectional view showing another shape of the protrusion before mold matching according to the second embodiment of the present invention, and is an enlarged view of FIG. 6;
【図８】本発明の第３実施例に係わる型合わせ前の鋳型
構造の一部構成を示す断面図である。FIG. 8 is a cross-sectional view showing a partial configuration of a mold structure before mold matching according to a third embodiment of the present invention.
【図９】本発明の第３実施例に関わる型合わせ後の鋳型
構造の一部構成を示す断面図である。FIG. 9 is a sectional view showing a partial configuration of a mold structure after mold matching according to a third embodiment of the present invention.
【図１０】本発明の第３実施例に係り、型合わせ時の鋳
型構造の一部構成とその崩壊する部分の実際の寸法をを
示す断面図である。FIG. 10 is a cross-sectional view showing a partial configuration of a mold structure at the time of mold matching and actual dimensions of a collapsed portion according to the third embodiment of the present invention.
【図１１】従来技術の型合わせ前の鋳型構造の一部構成
を示す断面図である。FIG. 11 is a cross-sectional view showing a partial configuration of a conventional mold structure before mold matching.
【符号の説明】１…上型、 ２…下型、 ３…キャビティ、 ４…第１
の突起部、 ４ａ…先端、 ５…空隙部、 ６…第２の
突起部、 ７…第１の遮断箇所、 ８…第２の遮断箇
所、 ９…隙間、 １０１…上型、 １０２…下型、
１０３…突起部、１０４ａ…先端部、 １０５…空隙
部。 [Description of Signs] 1 ... upper mold, 2 ... lower mold, 3 ... cavity, 4 ... first
4a: tip, 5: void, 6: second
Projection, 7: first cut-off point, 8: second cut-off point
Place, 9: gap, 101: upper mold, 102: lower mold,
103: protrusion, 104a: tip, 105: gap
Department.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭62−92044（ＪＰ，Ｕ) 実公 昭51−23605（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B22C 9/02 103 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 62-92044 (JP, U) Japanese Utility Model Sho 51-23605 (JP, Y2) (58) Fields investigated (Int. Cl. 7 , DB name) B22C 9/02 103
Claims (2)
する方向に所定量移動させ、複数の砂型を合わせること
によりキャビティを形成する鋳造用鋳型であって、一方
の砂型にはキャビティ周囲の所定位置に突設される突起
部と、該突起部に対し前記キャビティと反対側の周囲に
凹設される空隙部とが備えられるとともに、前記突起部
と前記空隙部とは連続的に形成されている鋳型構造にお
いて、前記突起部は該突起部の断面の底辺が前記砂型の
型閉め方向から、しかも該砂型の型閉め方向と垂直な面
に投影された線分の垂直二等分線よりも前記キャビティ
と反対側に断面の重心が偏心されていることを特徴とす
る鋳型構造。1. A casting mold comprising a plurality of sand molds, wherein said sand molds are moved by a predetermined amount in a direction approaching each other, and a plurality of sand molds are combined to form a cavity. A protrusion protruding at a position, and a cavity recessed around the projection on the side opposite to the cavity, and the protrusion and the cavity are formed continuously. Mold structure
The protrusion has a sand mold having a bottom of a cross section of the sand mold.
A surface perpendicular to the mold closing direction and perpendicular to the mold closing direction of the sand mold.
The cavity than the perpendicular bisector of the line segment projected on
Template structure that the center of gravity of the cross section on the opposite side, characterized in that you have been eccentricity.
一方の砂型に対向して配置されるとともに前記キャビテ
ィの周囲の所定位置に突設される突起部を有する他方の
砂型を備えてなることを特徴とする前記鋳型構造。2. A mold structure according to claim 1, wherein, prior Symbol
It is placed opposite one of the sand molds and the cavity
The other of which has a projection projecting at a predetermined position around the
The mold structure, comprising a sand mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06017423A JP3139260B2 (en) | 1994-02-14 | 1994-02-14 | Mold structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06017423A JP3139260B2 (en) | 1994-02-14 | 1994-02-14 | Mold structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07223039A JPH07223039A (en) | 1995-08-22 |
| JP3139260B2 true JP3139260B2 (en) | 2001-02-26 |
Family
ID=11943609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06017423A Expired - Fee Related JP3139260B2 (en) | 1994-02-14 | 1994-02-14 | Mold structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3139260B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101137006B1 (en) * | 2009-12-03 | 2012-04-20 | (주)엠이씨 | The fluorescent lamp type agricultural lamp for vegetable cultivation |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1893395B1 (en) * | 2005-05-31 | 2019-09-25 | Woodbridge Foam Corporation | Mold and method for manufacture thereof |
| CN107009580A (en) * | 2017-04-14 | 2017-08-04 | 宣城安安橡塑有限责任公司 | A kind of non-trimming mould |
-
1994
- 1994-02-14 JP JP06017423A patent/JP3139260B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101137006B1 (en) * | 2009-12-03 | 2012-04-20 | (주)엠이씨 | The fluorescent lamp type agricultural lamp for vegetable cultivation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07223039A (en) | 1995-08-22 |
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