JPH0686845U - Core pin for mold - Google Patents
Core pin for moldInfo
- Publication number
- JPH0686845U JPH0686845U JP3074093U JP3074093U JPH0686845U JP H0686845 U JPH0686845 U JP H0686845U JP 3074093 U JP3074093 U JP 3074093U JP 3074093 U JP3074093 U JP 3074093U JP H0686845 U JPH0686845 U JP H0686845U
- Authority
- JP
- Japan
- Prior art keywords
- hole
- pin
- base end
- core pin
- mold
- 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.)
- Withdrawn
Links
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
(57)【要約】
【目的】 本考案は、キャビティ内に組込まれ且つキャ
ビティ内に臨むピン孔に嵌合させるようにした中子ピン
の改良に関する。
【構成】 摺動型4の保持部11によって保持され、キ
ャビティ5内の突起部6に形成されたピン孔6aに嵌合
させるようにした金型用中子ピン12として、ピン孔6
aに嵌合可能な嵌合部12aと、保持部11の遊動孔1
1aを遊挿する中間軸部12bと、保持部11の大径孔
11bに遊嵌する基端部12cを設ける。そして、この
基端部12cの基端側端面Tを突状の球面形状にし、こ
の基端側端面Tを大径孔11bの平坦状底面Hに当接さ
せる。
(57) [Summary] [Object] The present invention relates to an improvement of a core pin incorporated in a cavity and fitted into a pin hole facing the cavity. A pin core 6 for a die is held by a holding part 11 of a sliding die 4 and is fitted into a pin hole 6a formed in a protrusion 6 in a cavity 5 as a die core pin 12.
a fitting portion 12a that can be fitted to a and the loose hole 1 of the holding portion 11
An intermediate shaft portion 12b for loosely inserting 1a and a base end portion 12c for loosely fitting in the large diameter hole 11b of the holding portion 11 are provided. Then, the base end side end surface T of the base end portion 12c is formed into a protruding spherical shape, and the base end side end surface T is brought into contact with the flat bottom surface H of the large diameter hole 11b.
Description
【0001】[0001]
本考案は、キャビティ内に組込まれ且つキャビティ内に臨むピン孔に嵌合させ るようにした中子ピンの改良に関する。 The present invention relates to an improvement of a core pin incorporated in a cavity and fitted into a pin hole facing the cavity.
【0002】[0002]
従来、例えば複雑な凹凸面形状の鋳造品の突起部にトンネル状の孔を成形する ような場合、鋳造時に中子ピンを使用することがある。 すなわち、例えば、図3に示すように、固定型51と可動型52の型合せ面に はキャビティ53が形成され、固定型51、或いは可動型52のキャビティ面か らキャビティ53内に向けて複数の突起部54を突設している。そして、この突 起部54には水平方向にピン孔54aが穿設されている。 又、この金型は、前記固定型51に対して横方向に摺動自在となり且つ本体部 56と保持部57からなる摺動型55を備えており、この保持部57の前方には 中子ピン58が取り付けられている。 そして、この中子ピン58は、前記突起部54のピン孔54a内に串刺し状に 嵌合可能となり、まず摺動型55が後退位置にある時に可動型52を移動させて 型締めし、その後、摺動型55を前進させて中子ピン58をピン孔54aに嵌合 させて注湯する。 そして、鋳造が終えるとまず摺動型55を後退させて中子ピン58とピン孔5 4aの係合状態を解いてから可動型52を開き、鋳造品を取り出すと、鋳造品の 突起部にトンネル状の穴が成形されている。 Conventionally, for example, when forming a tunnel-shaped hole in a protrusion of a cast product having a complicated uneven surface shape, a core pin may be used during casting. That is, for example, as shown in FIG. 3, cavities 53 are formed on the mating surfaces of the fixed die 51 and the movable die 52, and a plurality of cavities 53 are formed from the cavity surface of the fixed die 51 or the movable die 52 toward the inside of the cavity 53. The protruding portion 54 is provided in a protruding manner. A pin hole 54a is formed in the protrusion 54 in the horizontal direction. Further, this mold is provided with a sliding mold 55 which is slidable in the lateral direction with respect to the fixed mold 51 and which comprises a main body portion 56 and a holding portion 57, and a core is provided in front of the holding portion 57. A pin 58 is attached. The core pin 58 can be fitted in the pin hole 54a of the protrusion 54 in a skewered shape. First, when the sliding die 55 is in the retracted position, the movable die 52 is moved to clamp the die, and Then, the sliding die 55 is moved forward to fit the core pin 58 into the pin hole 54a, and the molten metal is poured. When the casting is completed, the sliding die 55 is first retracted to release the engagement state between the core pin 58 and the pin hole 54a, the movable die 52 is opened, and the cast product is taken out. A tunnel-shaped hole is formed.
【0003】[0003]
しかしながら、かかる複数の薄肉状の突起部54の肉厚等は異なることがあり 、熱膨張に差が生じてピン孔54aのセンタがずれたり変位したりすることがあ った。 そして、センタの位置がずれたピン孔54aに対して中子ピン58を無理やり 差込もうとすると、突起部54に干渉して無理な力が加わり、やがては破壊に通 じるといった不具合があった。 However, the plurality of thin-walled protrusions 54 may have different thicknesses and the like, and the center of the pin hole 54a may be displaced or displaced due to a difference in thermal expansion. If the core pin 58 is forcibly inserted into the pin hole 54a with the center position deviated, there is a problem that it interferes with the protrusion 54 and an excessive force is applied, which eventually leads to breakage. It was
【0004】[0004]
かかる課題を解決するため、本考案は金型の保持部によって保持され、キャビ ティ内に臨むピン孔に嵌合可能な金型用中子ピンとして、前記ピン孔に嵌合可能 な嵌合部と、前記保持部の遊動孔を遊挿する中間軸部と、前記保持部の大径孔に 遊嵌する基端部を設けた。 そして、この基端部の基端側端面を凸面形状にし、この基端側端面を前記大径 孔の平坦状底面に当接させた。 In order to solve such a problem, the present invention is a fitting part that is held by a holding part of a mold and can be fitted into the pin hole as a mold core pin that can be fitted into a pin hole facing the inside of the cavity. An intermediate shaft portion that loosely inserts the loose hole of the holding portion, and a base end portion that loosely fits in the large diameter hole of the holding portion are provided. Then, the base end side end surface of the base end portion was formed into a convex shape, and the base end side end surface was brought into contact with the flat bottom surface of the large diameter hole.
【0005】[0005]
大径孔の平坦状底面に当接する基端側端面を凸面形状にし、且つ中間軸部を遊 動可能にすることで、中子ピンの軸線方向が軽快に偏位可能となり、ピン孔のセ ンタがずれていても無理な力を加えることなく挿嵌せしめることが出来る。 By making the end face on the base end side that abuts the flat bottom surface of the large-diameter hole a convex shape and allowing the intermediate shaft part to move freely, the axial direction of the core pin can be deviated easily, and the pin hole Even if the input is misaligned, it can be inserted without applying excessive force.
【0006】[0006]
本考案の金型用中子ピンの実施例について添付した図面に基づき説明する。 図1は本案の中子ピンを採用した金型構造の実施例図、図2は要部拡大図であ る。 An embodiment of the mold core pin of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an embodiment of a mold structure using a core pin of the present invention, and FIG. 2 is an enlarged view of a main part.
【0007】 図1に示すように、本案の金型用中子ピンを採用した金型1は、固定型2と可 動型3と摺動型4を備え、各型2、3、4の型締め状態においてキャビティ5が 形成される。As shown in FIG. 1, a mold 1 employing the mold core pin of the present invention includes a fixed mold 2, a movable mold 3 and a sliding mold 4, and each of the molds 2, 3, 4 is The cavity 5 is formed in the mold clamped state.
【0008】 そして、このキャビティ5内には、固定型2又は可動型3のいずれかの側の型 合せ面から突設された突起部6が臨んでおり、この突起部6にはピン孔6aが穿 設されている。Inside the cavity 5, there is a projection 6 projecting from the mating surface on either side of the fixed mold 2 or the movable mold 3. The projection 6 has a pin hole 6a. Has been drilled.
【0009】 又、前記摺動型4は固定型2に対して水平方向に摺動自在とされている。 つまり、この摺動型4はシリンダユニット7に連結される本体部10と、この 本体部10の前面に一体的に取り付けられる保持部11を備え、この保持部11 には中子ピン12が取り付けられるとともに、これら本体部10と保持部11は 摺動受台13上を摺動自在にされている。The sliding die 4 is slidable in the horizontal direction with respect to the fixed die 2. That is, the sliding die 4 includes a main body portion 10 connected to the cylinder unit 7 and a holding portion 11 integrally attached to the front surface of the main body portion 10, and the core pin 12 is attached to the holding portion 11. The main body 10 and the holding portion 11 are slidable on the slide receiving base 13.
【0010】 それでは、摺動型4と中子ピン12の連結構造の細部について、図2に基づき 説明する。Now, details of the connecting structure between the sliding die 4 and the core pin 12 will be described with reference to FIG.
【0011】 保持部11には、摺動型4の摺動方向に沿って延出する遊動孔11aと、この 遊動孔11aに連なる大径孔11bを設けている。The holding portion 11 is provided with a loose hole 11a extending along the sliding direction of the sliding die 4 and a large diameter hole 11b connected to the loose hole 11a.
【0012】 又、中子ピン12は、軸方向の先端側から基端側に向けて順に嵌合部12a、 中間軸部12b、基端部12cを備え、嵌合部12aは前記突起部6のピン孔6 aに挿嵌可能とされるとともに、中間軸部12bは前記遊動孔11aに遊挿可能 とされている。又、基端部12cは前記大径孔11bに遊嵌可能とされている。Further, the core pin 12 is provided with a fitting portion 12a, an intermediate shaft portion 12b, and a base end portion 12c in this order from the tip end side to the base end side in the axial direction. The pin hole 6a can be inserted and the intermediate shaft portion 12b can be freely inserted into the floating hole 11a. Further, the base end portion 12c can be loosely fitted in the large diameter hole 11b.
【0013】 そして、嵌合部12aの軸径はピン孔6aの内径とほぼ同一にして両者が密着 して嵌合し合う程度にする一方、中間軸部12bの軸径は、遊動孔11aの内径 より僅かに小径にし、又、基端部12cの軸径は、大径孔11bの内径より小径 にして、夫々両者間に隙間が形成されるようにしている。The shaft diameter of the fitting portion 12a is set to be substantially the same as the inner diameter of the pin hole 6a so that the two fit closely to each other, while the shaft diameter of the intermediate shaft portion 12b is equal to that of the loose hole 11a. The diameter is made slightly smaller than the inner diameter, and the shaft diameter of the base end portion 12c is made smaller than the inner diameter of the large diameter hole 11b so that a gap is formed therebetween.
【0014】 又、中間軸部12bと遊動孔11aの間の隙間は、遊動孔11aの段差dを介 して先端側が狭く基端部側が広くなるようにしており、又、これらの隙間より基 端部12cと大径孔11bの間の隙間の方が広くなるようにしている。Further, the gap between the intermediate shaft portion 12b and the floating hole 11a is designed so that the tip end side is narrow and the base end portion side is wide through the step d of the floating hole 11a, and the gap is larger than these gaps. The gap between the end portion 12c and the large diameter hole 11b is made wider.
【0015】 そして基端部12cの後端面Tは突状の球面形状にして、大径孔11bの平坦 状底面Hに当接させている。The rear end surface T of the base end portion 12c is formed into a spherical shape having a protruding shape and is brought into contact with the flat bottom surface H of the large diameter hole 11b.
【0016】 従って、中子ピン12は遊動孔11a、大径孔11bとの隙間の範囲内で遊動 可能となり、平坦状底面Hを介して中子ピン12を前方に押圧することで、中子 ピン12の軸線方向を容易に偏位させることが出来る。Therefore, the core pin 12 is allowed to move within the range of the clearance between the floating hole 11a and the large diameter hole 11b, and by pressing the core pin 12 forward through the flat bottom surface H, the core pin 12 is moved forward. The axial direction of the pin 12 can be easily displaced.
【0017】 因みに、摺動型4の本体部10には凹部10aを設けており、この凹部10a と可動型3から突出したストッパで位置決め出来るようにしている。Incidentally, the main body portion 10 of the sliding die 4 is provided with a concave portion 10 a, and the concave portion 10 a and a stopper protruding from the movable die 3 enable positioning.
【0018】 以上のような金型用中子ピンにおいて、固定型2と可動型3が型締めした後、 シリンダユニット7を作動させて摺動型4を前進させる。In the die core pin as described above, after the fixed die 2 and the movable die 3 are clamped, the cylinder unit 7 is operated to move the sliding die 4 forward.
【0019】 この際、中子ピン12のセンタとピン孔6aのセンタが一致していると、中子 ピン12は円滑にピン孔6aに嵌合するが、センタ同士がずれていても、中子ピ ン12の基端部12c端面Tは平坦状底面H上を軽快に揺動し、倣うような状態 で中子ピン12の軸線方向を変更して嵌合させることが出来る。At this time, if the center of the core pin 12 and the center of the pin hole 6a are aligned with each other, the core pin 12 fits smoothly into the pin hole 6a, but even if the centers are misaligned, The end face T of the base end portion 12c of the child pin 12 swings lightly on the flat bottom surface H, and the axial direction of the core pin 12 can be changed and fitted in a state of following.
【0020】 このため、突起部6に無理な力がかからず、金型の損傷を防止出来るのみなら ず、中子ピン12とピン孔6aの嵌合度を高めることが出来る。Therefore, the protrusion 6 is not applied with an excessive force, and not only the damage of the mold can be prevented but also the degree of fitting between the core pin 12 and the pin hole 6a can be increased.
【0021】 このため、かかる状態のキャビティ5内にアルミ等の溶湯を注湯すると、いわ ゆるアルミ残りや逆バリ等の不具合がない。Therefore, when molten metal such as aluminum is poured into the cavity 5 in such a state, there are no problems such as residual aluminum and reverse burr.
【0022】 そして、かかる鋳造によってトンネル状の穴が成形されると、必要に応じて精 度を高めるための穴加工が施される。When the tunnel-shaped hole is formed by such casting, hole processing for increasing accuracy is performed as necessary.
【0023】[0023]
以上のように本考案の金型用中子ピンは、保持部の大径孔の平坦状底面に当接 する中子ピンの基端部端面を凸面形状にし、且つ保持部の遊動孔に対して中間軸 部を遊動可能に挿通させるようにしたため、中子ピンの軸線方向が容易に変換出 来、ピン孔のセンタとずれていても倣うように嵌合させることが出来る。 従って金型に無理な力が加わらず、しかも逆バリ等の不具合を防止することが 出来る。 As described above, in the mold core pin of the present invention, the base end face of the core pin that abuts the flat bottom surface of the large diameter hole of the holding part has a convex shape, and Since the intermediate shaft portion is movably inserted therein, the axial direction of the core pin can be easily converted, and the core pin can be fitted so as to follow even if it is displaced from the center of the pin hole. Therefore, no excessive force is applied to the mold, and it is possible to prevent problems such as reverse burr.
【図1】本案の中子ピンを採用した金型構造の実施例図FIG. 1 is a diagram showing an embodiment of a mold structure adopting a core pin of the present invention.
【図2】図1の要部拡大図FIG. 2 is an enlarged view of a main part of FIG.
【図3】従来図FIG. 3 Conventional diagram
1 金型 5 キャビティ 6a ピン孔 11 保持部 11a 遊動孔 11b 大径孔 12 中子ピン 12a 嵌合部 12b 中間軸部 12c 基端部 H 平坦状底面 T 後端面 1 Mold 5 Cavity 6a Pin Hole 11 Holding Part 11a Floating Hole 11b Large Diameter Hole 12 Core Pin 12a Fitting Part 12b Intermediate Shaft Part 12c Base End H Flat Bottom T Rear End Face
Claims (1)
ティ内に臨むピン孔に嵌合可能な金型用中子ピンにおい
て、この金型用中子ピンは前記ピン孔に嵌合可能な嵌合
部と、前記保持部の遊動孔を遊挿する中間軸部と、前記
保持部の大径孔に遊嵌する基端部を備え、この基端部の
基端側端面を凸面形状にするとともに、この基端側端面
を前記大径孔の平坦状底面に当接させたことを特徴とす
る金型用中子ピン。1. A mold core pin, which is held by a mold holding part and can be fitted into a pin hole facing a cavity, wherein the mold core pin is fit into the pin hole. A joint portion, an intermediate shaft portion that loosely inserts the loose hole of the holding portion, and a base end portion that loosely fits in the large-diameter hole of the holding portion, and the end face of the base end portion on the base end side has a convex shape. At the same time, the base end side end surface is brought into contact with the flat bottom surface of the large-diameter hole, and a mold core pin for a mold is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3074093U JPH0686845U (en) | 1993-06-08 | 1993-06-08 | Core pin for mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3074093U JPH0686845U (en) | 1993-06-08 | 1993-06-08 | Core pin for mold |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0686845U true JPH0686845U (en) | 1994-12-20 |
Family
ID=12312078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3074093U Withdrawn JPH0686845U (en) | 1993-06-08 | 1993-06-08 | Core pin for mold |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0686845U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003062641A (en) * | 2001-08-24 | 2003-03-05 | Honda Motor Co Ltd | Core pin structure for die |
JP2013128961A (en) * | 2011-12-22 | 2013-07-04 | Ryobi Ltd | Die for die casting and die casting method |
-
1993
- 1993-06-08 JP JP3074093U patent/JPH0686845U/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003062641A (en) * | 2001-08-24 | 2003-03-05 | Honda Motor Co Ltd | Core pin structure for die |
JP2013128961A (en) * | 2011-12-22 | 2013-07-04 | Ryobi Ltd | Die for die casting and die casting method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19971106 |