JPH035058A - Core pin for die - Google Patents
Core pin for dieInfo
- Publication number
- JPH035058A JPH035058A JP13991089A JP13991089A JPH035058A JP H035058 A JPH035058 A JP H035058A JP 13991089 A JP13991089 A JP 13991089A JP 13991089 A JP13991089 A JP 13991089A JP H035058 A JPH035058 A JP H035058A
- Authority
- JP
- Japan
- Prior art keywords
- pin
- outer diameter
- insertion part
- product
- stepped
- 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
- 238000003780 insertion Methods 0.000 claims abstract description 52
- 230000037431 insertion Effects 0.000 claims abstract description 52
- 238000000465 moulding Methods 0.000 claims description 29
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000002184 metal Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
に組込まれ、製品成形空間部どなるキャビティを構成す
る構成部材としＣ利用される中子ピン、特に段イ」形状
に形成してなる段イ］中子ピンの改良に関する。[Detailed Description of the Invention] [Regarding improvement of a core pin which is incorporated into a molding machine and used as a constituent member constituting a cavity in a product molding space, particularly a core pin formed into a stepped shape. .
〈従来の技術背景及びその問題点〉
一般に、此種の段付中子ピンは金型のキャビデイ面から
同型背面に向って穿設されたピン取付孔に、型背面側か
ら嵌め込み挿着される挿着部の先端に、この挿着部の直
径より小径どじ段部を介して所望角度の扱【ノ勾配をも
−）てＶＸＩビｊイ而に面出させる製品形成部を一体に
切削形成しでなるものである、。<Conventional technical background and its problems> In general, this type of stepped core pin is inserted and inserted from the back side of the mold into a pin installation hole drilled from the cavity surface of the mold toward the back side of the mold. At the tip of the insertion part, a product forming part is integrally cut and formed through a stepped part with a diameter smaller than the diameter of the insertion part to expose the VXI surface at a desired angle (also with a slope). This is what happens.
しかし乍ら、キャビティ内に充填された溶湯のキユアリ
ング中に発生する製品部の凝固収縮によって製品成形部
が軸方向に対して直交覆る荷■（外力）を受（）た際そ
の製品成形部の根元である挿着部との段部部分に曲げ応
力が集中して掛り、繰り返し掛る局部的な強度の応力集
中によって該段部部分に金属疲労に伴う亀裂が入り応力
集中はまＪま１ａｉｌ！！Ｉｂ＜なっ−Ｃ亀裂は加速瓜
的に生成進行し、最終的に製品形成部が根元の段部部分
から折れでしまうどい−）ｌＪ中子ピンのスｆ命を短く
する大きな原因になっていた。また応力集中による中子
ピンの破損が金型故障率の上位を占め、此種の中子ピン
を組込／υだ金型を使用するダイカスＩ−業界等におい
Ｃ人ぎな問題になっている。However, when the product molded part receives a load (external force) perpendicular to the axial direction due to solidification shrinkage of the product part that occurs during curing of the molten metal filled in the cavity, the product molded part Bending stress is concentrated on the stepped part between the base and the insertion part, and due to the localized stress concentration that is applied repeatedly, cracks occur in the stepped part due to metal fatigue, and the stress concentration does not stop! ! Cracks form and progress at an accelerated rate, and eventually the product forming part breaks from the stepped part at the root.) This is a major cause of shortening the life of the J core pin. Ta. In addition, damage to core pins due to stress concentration accounts for the highest mold failure rate, and has become a serious problem in the die casting industry, etc., which uses molds that incorporate this type of core pin. .
〈発明が解決しようとする課題〉
本発明はこの様な従来事情に鑑みてなされたしので、そ
の解決しようとする技術的課題は、製品部の凝固収縮に
伴って製品成形部に生じる応力を軽減することにある。<Problems to be Solved by the Invention> The present invention has been made in view of the above conventional circumstances, and the technical problem to be solved is to reduce the stress generated in the product molding part due to solidification and shrinkage of the product part. The goal is to reduce it.
。
〈技術的課題を達成Ｊ−るための手段〉上記課題を達成
するＩこめに本Ｒが講じる技術的手段は、金型に穿設さ
れたビン取付孔に挿着りる挿着部を、この挿着部の外径
より小径な外径にてキャビティ面から突出する製品成形
部と略同径な外径にて連設する遊挿部ど、この遊挿部と
同ｎｉｂ状に連設され前記ピン取付孔に密接状に嵌挿さ
れる嵌挿部とから形成したことである３゜
又、金型に穿設されたピン取付孔に挿＠りる挿着部の先
端に、この挿着部の外径より小径とし段部を介してキャ
ビデイ面から突出する製品成形部を形成してなる段付中
子ピンに於いて、前記段部側から挿着部の外径を所望の
長ざ範囲にて細く形成ηるど共に、段部部分を−１−１
／ビう一イ面に沿わＵて突出さけたピン取付孔を塞ぐ閉
鎖部としたことである、。. <Means for achieving the technical problem> The technical measures taken by this R to achieve the above-mentioned problem are as follows: A loose insertion part that has an outer diameter smaller than the outer diameter of this insertion part and has an outer diameter that is approximately the same as the product molding part that protrudes from the cavity surface is connected in the same nib shape as this loose insertion part. and an insertion part that is inserted into the pin installation hole in a close manner. In a stepped core pin formed with a product molded part having a smaller diameter than the outer diameter of the insertion part and protruding from the cavity surface through the stepped part, the outer diameter of the insertion part is adjusted to a desired length from the stepped part side. Formed thinly in the range η, but the step part is -1-1
/ A closed part is used to close the pin attachment hole that protrudes along the other side of the U.
更に、製品成形部が突出り−る段部側から挿着部の外径
を所望の長さ範囲にて細く形成すると共にピン取（＝Ｊ
孔の内周面に接づ−る段部部分の外周を軸方向に弯曲さ
せた凸型球面形状に形成したことである。Furthermore, the outer diameter of the insertion part is narrowed in a desired length range from the stepped part side where the product molding part protrudes, and a pin (=J
The outer periphery of the stepped portion in contact with the inner peripheral surface of the hole is formed into a convex spherical shape that is curved in the axial direction.
〈作用〉
而して、上記した本発明第１請求項記載の技術的手段に
よれば、製品成形部が溶湯の−１−コアリング中に発生
する製品部の凝固収縮に伴い軸方向に対して直交ηる荷
Φを受りると、略同径な外径にて連設する挿着Ｆｉｌの
遊挿部に至る広い長さ範囲で撓む、それによって、製品
成形部に生じる応力（曲げ応力）は軽減される。<Function> According to the above-mentioned technical means of the first claim of the present invention, the product forming part is axially moved due to solidification shrinkage of the product part that occurs during -1-coring of the molten metal. When it receives a load Φ perpendicular to η, the insertion filters that are connected with each other with approximately the same outer diameter are bent over a wide length range up to the loose insertion part, which causes stress ( bending stress) is reduced.
又、第２請求項記載の技術的手段によれば、製品成形部
が軸方向に対して直交する荷重を受けると、キャビティ
面に沿わせて突出形成したピン取イリ孔を塞ぐ閉鎖部を
介して連設する細く形成した挿着部の小径軸部に至る広
い長さ範囲ひ撓む、それによって、製品成形部に〈１し
る応力（最大曲げ応力）が軽減される１、そして、ピン
取付孔のキャビティ面側間に１部は閉鎖部によって塞が
れているから、キャビティ面に充填された溶湯のピン取
イ１孔内への浸入を阻止する。Further, according to the technical means described in the second claim, when the product molded part receives a load perpendicular to the axial direction, the pin removal hole protrudingly formed along the cavity surface is closed via the closing part. The pin is bent over a wide length range up to the small-diameter shaft of the thin insertion part that is connected to the pin. Since a portion of the cavity surface side of the mounting hole is closed by the closing portion, the molten metal filled in the cavity surface is prevented from entering the pin hole 1.
更に、第３請求項記載の技術的手段によれば、製品成形
部が軸方向に対して直交する荷重を受（プると、ピン取
付孔の内周面に軸り向の凸型球面形状に接する段部部分
は製品成形部に生じる応力に起因して軸方向に動き、そ
の動きに起因して細く形成した挿着部の小径軸部が前記
段部部分を支点に撓む、それによっ−Ｃ，、製品成形部
に生じた応力は軽減される９、そして、凸型球面形状の
段部外周はキャビデイ面側のピン数句孔の内周面に軸方
向の球面接触にて接するから、キ（ノビティ内に充填さ
れた溶湯のピン成句孔内への浸入を阻止する。Furthermore, according to the technical means described in the third claim, when the product forming part receives a load perpendicular to the axial direction, a convex spherical shape in the axial direction is formed on the inner circumferential surface of the pin mounting hole. The stepped portion in contact with the molded portion moves in the axial direction due to the stress generated in the product molding portion, and due to this movement, the small diameter shaft portion of the thin insertion portion bends using the stepped portion as a fulcrum. -C, The stress generated in the product molding part is reduced9, and the outer periphery of the convex spherical stepped part contacts the inner periphery of the pin hole on the cavity surface side with spherical contact in the axial direction. , Ki (prevents the molten metal filled in the nobity from penetrating into the pin hole.
〈実施例〉
本発明の実施の一例を図面に基づいて説明すると第１図
は第１請求項に係る実施例を示し、中子ピン（△１）は
金型（Ｂ）を構成りる嵌め込み型（［））に穿設された
ピン取イ１孔（１）に適合状に嵌挿する嵌挿部（２）と
遊嵌状に内在さＵる遊挿部（３）とからなる挿着部（ａ
ｌ）と、この挿着部（ａｌ）の遊挿部（３）に連設され
てキャビティ面（４）から突出する製品成形部（ａ２）
とから構成Ｍる。。<Example> An example of the implementation of the present invention will be described based on the drawings. FIG. 1 shows an example according to the first claim, in which the core pin (△1) is an inset part constituting the mold (B). An insert consisting of a fitting part (2) that fits into the pin hole 1 hole (1) drilled in the mold ([)) and a loose fitting part (3) that fits inside the pin hole (1) in a loose fit. Attire (a)
l), and a product molding part (a2) that is connected to the loose insertion part (3) of this insertion part (al) and protrudes from the cavity surface (4).
It is composed of M. .
上記遊挿部（３）は、挿着部（ａ＋ ）の嵌挿部（２）
外径より小径な外径で゛形成されてキャビティ面（４）
から突出覆る製品成形部（ａｌ）の外径と略同径な外径
にて挿着部（ａｌ）に所望の長さ範囲で形成し、嵌挿部
（２）に段部（５）を介して同軸状に連設してなる。The loose insertion part (3) is the insertion part (2) of the insertion part (a+).
The cavity surface (4) is formed with an outer diameter smaller than the outer diameter.
A stepped portion (5) is formed on the insertion portion (al) in a desired length range with an outer diameter that is approximately the same as the outer diameter of the product molding portion (al) protruding from and covering the product, and a stepped portion (5) is formed on the insertion portion (2). They are coaxially connected through the intermediary.
即ら、図示した様に製品成形部（ａｌ）と遊挿部（３）
とを所望角度の抜Ｃノ勾配を有り−る＃Ｉ艮い棒状に形
成して遊挿部（３）をピン取付孔（１）に適合状に嵌め
込み挿着される嵌挿部（２）に段部（５）を介して連設
さＵたピンＷＪ造として、キャビティ面に充填された溶
湯の一１１アリング中に発生する製品の凝固収縮に伴い
軸方向に対して直交りる細小を製品成形部（ａｌ）が受
りた際、ピン取イζ１孔（１）内に遊嵌状に内在さけた
遊挿部（３）に至る広い長さ範囲（Ｌ ）で撓む様にし
て製品成形部（ａｌ）に生じる応力（曲げ応力）の軽減
化を図る。。That is, as shown in the figure, the product molding part (al) and the loose insertion part (3)
The loose insertion part (3) is formed into a #I bar shape with a desired angle of draft C slope, and the loose insertion part (3) is fitted into the pin mounting hole (1) to fit the insertion part (2). As for the U-shaped pin WJ structure, which is connected via the stepped part (5), the molten metal filled in the cavity surface has small and narrow holes perpendicular to the axial direction due to solidification shrinkage of the product that occurs during ringing. When the product molding part (al) is received, it is bent in a wide length range (L) up to the loose insertion part (3) which is loosely fitted inside the pin hole ζ1 hole (1). Aim to reduce stress (bending stress) generated in the product molding part (al). .
第２図及び第３図は第２乙！１求項に係る実施例を示し
、断る申子ピン（Ａ２）は金型（Ｂ）のピン取付孔（１
）に適合状に嵌め込み１４ｉ着する挿着部（ａ＋ ）の
先端に、ピン取付孔（１）を塞ぐ閉鎖部（６）を介して
挿着部（ａｌ）の外径より小径としキャビティ面（４）
から突出する製品成形部（ａｌ）を形成覆ると共に、ｌ
！着部（ａｌ）の外径を前記閉鎖部（６）側から所望の
長さ範囲にて細く形成せしめて小径軸部（７）を設りる
。Figures 2 and 3 are 2nd B! An example related to claim 1 is shown, and the sheath pin (A2) that is rejected is the pin mounting hole (1) of the mold (B).
) is inserted into the tip of the insertion part (a+) which fits into the hole (14i) through a closing part (6) that closes the pin mounting hole (1), and the cavity surface (al) has a smaller diameter than the outer diameter of the insertion part (al). 4)
Forming and covering the product molding part (al) protruding from the
! A small diameter shaft portion (7) is provided by narrowing the outer diameter of the attachment portion (al) over a desired length range from the closing portion (6) side.
上記閉鎖部（６）は、製品成形部（ａｌ）の根元部分よ
りキャビティ面（４）に沿わせた鍔状に突出形成せしめ
て溶湯がピン取付孔（１）内に入り込まない様にする。The closing portion (6) is formed to protrude from the root portion of the product molding portion (al) in the shape of a flange along the cavity surface (4) to prevent molten metal from entering the pin attachment hole (1).
尚、閉鎖部（６）は溶湯が入り込まない程度のクリアラ
ンスをキャビティ面（４）との間に確保した状態にて該
キャビティ面（４）に沿う寸法で形成することが好まし
い。It is preferable that the closing portion (6) is formed with dimensions along the cavity surface (4) while ensuring a clearance between the closed portion (6) and the cavity surface (4) to an extent that molten metal does not enter.
小径軸部（７）は、製品成形部（ａｌ）がｌ１ｉｌｌ
１ｉ向に対して直交する荷重を受りた際、それに起因し
て撓む外径（太さ）及び長さにて１１Ｔｉ着部（ａｌ）
に形成してピン取付孔（１）内に遊嵌状に内在ざし、」
一連した第１ ？ｉ求求肥記載実施例と同様の作用、即
ち小径軸部（７）に至る広い長さ範囲（Ｌ）で撓む様に
して製品成形部（ａｌ）に生じる応力の軽減化を図る。The product forming part (al) of the small diameter shaft part (7) is l1ill.
When receiving a load perpendicular to the 1i direction, the outer diameter (thickness) and length of the 11Ti fitting part (al) bends due to it.
and is loosely fitted into the pin mounting hole (1).
The first in a series? i The same effect as in the described embodiment, that is, the stress generated in the product forming part (al) is reduced by bending in a wide length range (L) up to the small diameter shaft part (7).
第４図乃至第６図は第３請求項に係る各実施例であり、
第４図はモの第１実施例を示し、斯る中子ピン（Ａ３）
は金型（Ｂ）のピン取付孔（１）に適合状に嵌め込み挿
着りるＩｌｉ着部（ａｌ）の先端に、段部〈８）を介し
て該挿着部（ａ＋ ）の外径より小径とし−ｌｘ： ｔ
−ビティ面（４）から突出する製品成形部（ａｌ）を形
成してなるものであり、挿着部（ａｌ）の外径を段部（
８）側から所望の長さ範囲にて細く形成けしめて小径軸
部（９）を設りるど共に、ピン取付孔（１）の内周面に
接覆る段部（８）部分の外周を軸り向の凸形球面形状に
形成する。4 to 6 are each embodiment according to the third claim,
FIG. 4 shows a first embodiment of the core pin (A3).
is the outer diameter of the insertion part (a+) through the stepped part <8) at the tip of the Ili fitting part (al) which is fitted and inserted into the pin mounting hole (1) of the mold (B). -lx: t
- A product molding part (al) is formed that protrudes from the bit surface (4), and the outer diameter of the insertion part (al) is changed by a stepped part (
8) Form and tighten the small diameter shaft part (9) in a desired length range from the side, and at the same time, tighten the outer periphery of the stepped part (8) that contacts the inner peripheral surface of the pin mounting hole (1). It is formed into a convex spherical shape in the axial direction.
上記小径＠部（９）は、製品成形部（ａｌ）が軸方向に
対して直交する荷重を受【プた際、それに起因して軸方
向に動く凸型段部（８）の動きに起因して撓む外径（人
さ）及び長さ範囲にて挿着部（ａｌ）に形成する。The small diameter @ part (9) is caused by the movement of the convex step part (8) that moves in the axial direction when the product forming part (al) receives a load perpendicular to the axial direction. The insertion portion (al) is formed in the outer diameter (length) and length range that can be bent.
凸型段部（８）の軸方向凸形球面形状は図示した様に小
径軸部（９）との句り根からピン取付孔（１）の開口縁
に向（Ｊてキャビティ面（４）に面一状に位置覆る漸次
軸方向の凸形球面状に形成し、軸方向に平面的なピン取
付孔（１）の内周面に対して球面接触させて製品成形部
（ａｌ）が受（する荷重に起因して動く様に図り、ピン
取付孔（１）の開口縁内周面との球面接触を保持させて
溶湯が入り込まない様に図る。As shown in the figure, the convex spherical shape of the convex step part (8) extends from the corner with the small diameter shaft part (9) toward the opening edge of the pin mounting hole (1) (J to the cavity surface (4)). The product molding part (al) is formed into a convex spherical shape in the axial direction, and the product molding part (al) is made into spherical contact with the inner peripheral surface of the pin mounting hole (1) which is flat in the axial direction. (It is designed so that it moves due to the load applied to it, and it is designed to maintain spherical contact with the inner circumferential surface of the opening edge of the pin mounting hole (1) to prevent molten metal from entering.
第５図は第２実施例を示し、斯る中子ピン（Ａ４）は第
１実施例詳述の凸型段部（８）をピン取付孔（１）の孔
径よりも大きく形成し、 ７Ｊピン取付孔（１）の開口
縁内周面を凸型段部（１０）が適合する軸方向凹型球面
形状に拡聞けしめてその凹型開口部（１１）に凸型段部
（１０）をキャビティ面（４）面一状態で軸方向球面接
触にて適合９る様にしてなる。FIG. 5 shows a second embodiment, and such a core pin (A4) has a convex stepped portion (8) described in detail in the first embodiment formed larger than the hole diameter of the pin attachment hole (1), and has a diameter of 7J. The inner peripheral surface of the opening edge of the pin mounting hole (1) is widened into an axially concave spherical shape to which the convex step (10) fits, and the convex step (10) is fitted into the concave opening (11) on the cavity surface. (4) Fit is made by spherical contact in the axial direction in a flush state.
第６図は第３実施例を示し、斯る中イピン（Ａ５）は第
１実施例詳述の凸型段部（８）の凸型球面形態を逆にし
たものである。即ち凸型段部０
（８）の外周を製品成形部（ａ２）の根元から小径軸部
（９）との付（）根に向けて漸次軸方向の凸型球面状に
形成し、一方ピン取イ・」孔（１）の開口縁内周面を凸
型段部（１２）に適合づ゛る軸方向凹型球面形状に絞り
込んでその凹型開口部（１３）に凸型段部（１２）を第
２実施例ど同じ＜ １１１方向球面接触にて適合する様
にしてなる。FIG. 6 shows a third embodiment, in which the pin (A5) is the convex spherical shape of the convex stepped portion (8) described in detail in the first embodiment. That is, the outer periphery of the convex step part 0 (8) is gradually formed into a convex spherical shape in the axial direction from the root of the product forming part (a2) to the root of the connection with the small diameter shaft part (9). The inner peripheral surface of the opening edge of the hole (1) is narrowed into an axially concave spherical shape that fits the convex step (12), and the convex step (12) is fitted into the concave opening (13). is adapted to the same <111 direction spherical contact as in the second embodiment.
而して、斯る第３請求項に係る各実施例詳述の中子ピン
（Ａ３ ） （Ａ４ ） （Ａｓ ）は金型（Ｂ）
のピン取付孔（１）の内周面に軸方向の球面接触に−Ｃ
接する凸型段部（８） （１０） （１２）を介し
てキャビデイ面（／Ｉ）から突出する製品成形部（ａ２
）とピン取付孔（１）に挿嵌状に内在する小径軸部（９
）とを連設させた段イ」ピン構造としく、ギヤごブイ内
に充填された溶湯の１：コアリング中に発生覆る製品の
常に−・定範囲の凝固収縮によつＣ製品成形部（ａ２）
が軸方向に対して直交する荷重を受けた際、軸方向に動
く（回転する）凸型段部（ε３＞ （１０） （１
２）のｖＪきに起因して小径軸部（９）に至る広い長さ
範囲（１−）で撓む様１
にして製品成形部（ａ２）に生じる応力（曲げ応力）の
軽減化を図る様にしたしので・ある。Therefore, the core pins (A3) (A4) (As) in the detailed description of each embodiment according to the third claim are molds (B).
-C in axial spherical contact with the inner peripheral surface of the pin mounting hole (1).
The product molding part (a2) protrudes from the cavity surface (/I) through the convex stepped parts (8) (10) (12)
) and the small diameter shaft part (9) that fits into the pin mounting hole (1).
), and the molten metal filled in the gear buoy is formed during coring. (a2)
The convex step part (ε3> (10) (1
Due to the vJ of 2), the stress (bending stress) generated in the product forming part (a2) is reduced by bending in a wide length range (1-) up to the small diameter shaft part (9). I've been to a lot of people since then.
〈発明の効果〉
本発明の中子ピンは叙上の如く構成してなるから、下記
の作用効果を奏する。<Effects of the Invention> Since the core pin of the present invention is constructed as described above, it exhibits the following effects.
■金型のピン取付孔に挿着する挿着部の一部分を製品成
形部の外径と略同径な外径にて形成して該製品成形部と
同軸状に連設する遊挿部としてなるから、製品成形部が
軸方向に対して直交する荷重を受【プると遊挿部に至る
広い長さ範囲（１−）で撓む。従って、従来の中子ピン
に化べて製品成形部に生じる応力（曲げ応力）の軽減化
を図り、中子ピンのか命を延長させることが出来る。■A part of the insertion part that is inserted into the pin mounting hole of the mold is formed with an outer diameter that is approximately the same as the outer diameter of the product molding part, and is used as a loose insertion part that is coaxially connected to the product molding part. Therefore, when the product molded part receives a load perpendicular to the axial direction, it bends over a wide length range (1-) up to the loose insertion part. Therefore, it is possible to reduce the stress (bending stress) generated in the product molding part by replacing it with a conventional core pin, and extend the life of the core pin.
■挿着部の外径を製品成形部の根元段部側から所望の長
さに（細く形成するど」Ｌに、前記段部をキャビデイ面
に沿わけて突Ｓ ｔしめたピン取イ（１孔を塞ぐ閉鎖部
としてなるから、閉鎖部にて−１−Ａ７ビテイ内に充填
された溶湯のピン取付孔への浸入を阻止した状態で製品
成形部が細手を受りた際には」−記効果■と同じ作用、
即ち細く形成してピン取２
付孔内に遊嵌状に内在ざぜた小径軸部に至る広い長さ範
囲（Ｌ）で撓ま眩ることが出来る。■The outer diameter of the insertion part is set to the desired length from the root step side of the product molding part (formed thinly), and the step part is protruded along the cavity surface. Since it serves as a closed part that closes one hole, when the product molding part is subjected to narrow handling while the closed part prevents the molten metal filled in the -1-A7 bit from entering the pin mounting hole. ” - the same effect as the effect ■,
In other words, it is formed thin so that it can bend and bend over a wide length range (L) up to the small diameter shaft part which is loosely fitted into the pin hole 2.
■ピン取付孔の内周面に接する挿着部の小径軸部とのイ
」け根から製品成形部の根元に至る段部部分の外周を軸
方向の凸形球面形状に形成してなるから、段部部分はピ
ン取付孔の内周面に対して軸方向の球面接触にて接し、
製品成形部が軸方向にり・１して直交する荷重を受ける
と段部部分はそれに起因して軸方向に動く。従って、製
品成形部が荷重を受（するど段部部分を介してピン取付
孔に遊嵌状に内在ける小径軸部に至る広い長さ範囲（Ｌ
）にて撓むため、製品成形部に生じる応力の軽減化を図
り得る。■This is because the outer periphery of the stepped part from the base of the small-diameter shaft part of the insertion part that contacts the inner peripheral surface of the pin mounting hole to the base of the product molding part is formed into a convex spherical shape in the axial direction. , the step part contacts the inner peripheral surface of the pin mounting hole with spherical contact in the axial direction,
When the product forming part is subjected to an orthogonal load in the axial direction, the stepped portion moves in the axial direction due to this. Therefore, the product forming part receives the load (a wide length range (L
), the stress generated in the product molding part can be reduced.
■軸方向凸型球面形状の段部部分はピン取付孔の内周面
に球面接触にて常に接しているから、ピン取付孔に溶湯
が入り込むことはない。■Since the axially convex spherical stepped portion is always in spherical contact with the inner peripheral surface of the pin mounting hole, molten metal will not enter the pin mounting hole.
依って、所期の目的を）Ｙ成し得た。Therefore, I was able to achieve my desired goal.
第１図は本発明第１請求項に係る中子ピンの実施例であ
り、金型に組込ｌυだ状態を示す正面図、３
第２図及び第３図は第２請求項に係る実施例を示し、第
２図は金型に組込んだ状態を示１正面図、第３図は第２
図の（Ｉ［）、−（ＩＩＩ）線断面図、第４図乃至第６
図は第３請求項に係る各実施例であり、金型に組込んだ
状態を示す正面図である。
尚、図中
（Ａ＋ ）（Ａ２）（八３ ）（Ａ４ ）（Ａ５ ）
：中子ピン（ａｔ ） ：挿着部 （ａ２）：製品成
形部（１）：ビン取付孔 （２）：嵌挿部
（３） ：３Ｉｉ挿部 （４）：キャビディ面（５
）（８）（１０）（１２） ：段 部（６）：閉鎖部
（７）（９）：小径軸部（Ｂ）：金 型
特 許 出 願 人 株式金相アーレスブイ代
理
人
甲
」
政
名
４Fig. 1 shows an embodiment of the core pin according to the first claim of the present invention, and is a front view showing a state in which it is assembled into a mold, and Fig. 3 shows an embodiment of the core pin according to the second claim. An example is shown. Figure 2 shows the state assembled in the mold. Figure 1 is a front view, and Figure 3 shows the state where it is assembled into the mold.
(I[), -(III) line sectional views in the figure, Figures 4 to 6
The figure shows each embodiment according to the third claim, and is a front view showing a state where it is assembled into a mold. In addition, (A+) (A2) (83) (A4) (A5) in the figure
: Core pin (at) : Insertion part (a2) : Product molding part (1) : Bottle attachment hole (2) : Insertion part (3) : 3Ii insertion part (4) : Cavity surface (5
)(8)(10)(12): Step part (6): Closed part
(7) (9): Small-diameter shaft part (B): Mold patent Applicant: Stock Kinso Ares Buoy Agent A” Masanai 4
Claims (3)
、この挿着部の外径より小径な外径にてキャビティ面か
ら突出する製品成形部と略同径な外径にて連設する遊挿
部と、この遊挿部と連設され前記ピン取付孔に適合状に
嵌挿される嵌挿部とから形成したことを特徴とする金型
用中子ピン。(1) The insertion part to be inserted into the pin mounting hole drilled in the mold has an outer diameter that is smaller than the outer diameter of the insertion part and has an outer diameter that is approximately the same as the product molding part that protrudes from the cavity surface. A core pin for a mold, characterized in that it is formed of a loose insertion part that is connected to the loose insertion part in a diameter, and an insertion part that is connected to the loose insertion part and is fitted into the pin attachment hole in a conforming manner.
先端に、この挿着部の外径より小径とし段部を介してキ
ャビティ面から突出する製品成形部を形成してなる段付
中子ピンに於いて、前記段部側から挿着部の外径を所望
の長さ範囲にて細く形成すると共に、段部部分をキヤビ
ティ面に沿わせて突出させたピン取付孔を塞ぐ閉鎖部と
したことを特徴とする金型用中子ピン。(2) At the tip of the insertion part that is inserted into the pin mounting hole drilled in the mold, a product molding part is formed that has a diameter smaller than the outer diameter of this insertion part and projects from the cavity surface through a stepped part. In the stepped core pin, the outer diameter of the insertion portion is narrowed from the stepped side to a desired length range, and the stepped portion protrudes along the cavity surface. A core pin for a mold, characterized by having a closed part that closes a hole.
先端に、この挿着部の外径より小径とし段部を介してキ
ヤビティ面から突出する製品成形部を形成してなる段付
中子ピンに於いて、前記段部側から挿着部の外径を所望
の長さ範囲にて細く形成すると共に、ピン取付孔の内周
面に接する段部部分の外周を軸方向に弯曲させた凸型球
面形状に形成したことを特徴とする金型用中子ピン。(3) At the tip of the insertion part that is inserted into the pin mounting hole drilled in the mold, a product molding part is formed that has a smaller diameter than the outer diameter of this insertion part and projects from the cavity surface via a stepped part. In the stepped core pin, the outer diameter of the insertion portion is narrowed from the step side within a desired length range, and the outer periphery of the step portion that is in contact with the inner peripheral surface of the pin mounting hole is A mold core pin characterized by being formed into a convex spherical shape curved in the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1139910A JPH0780042B2 (en) | 1989-05-31 | 1989-05-31 | Core pin for mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1139910A JPH0780042B2 (en) | 1989-05-31 | 1989-05-31 | Core pin for mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH035058A true JPH035058A (en) | 1991-01-10 |
| JPH0780042B2 JPH0780042B2 (en) | 1995-08-30 |
Family
ID=15256483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1139910A Expired - Fee Related JPH0780042B2 (en) | 1989-05-31 | 1989-05-31 | Core pin for mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0780042B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010101123A1 (en) * | 2009-03-02 | 2010-09-10 | いすゞ自動車株式会社 | Casting device |
| FR2949363A1 (en) * | 2009-08-25 | 2011-03-04 | Peugeot Citroen Automobiles Sa | Pin for die casting, comprises a guiding part arranged in a mold bore, and a molding part to project in a mold cavity, where the guiding part has a zone and a recess of which a diameter is lower than a diameter of the guiding part |
| JP2016078118A (en) * | 2014-10-14 | 2016-05-16 | 現代自動車株式会社Ｈｙｕｎｄａｉ Ｍｏｔｏｒ Ｃｏｍｐａｎｙ | Core pin having function for preventing mixing of molten metal into pipe and casting apparatus using the same |
| JP2017094372A (en) * | 2015-11-26 | 2017-06-01 | 株式会社スグロ鉄工 | Core pin and metal mold for casting |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62196115A (en) * | 1986-02-21 | 1987-08-29 | Honda Motor Co Ltd | Molding of molded hole and molding equipment thereof |
| JPH01171908A (en) * | 1987-12-28 | 1989-07-06 | Toshiba Corp | Metal mold |
-
1989
- 1989-05-31 JP JP1139910A patent/JPH0780042B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62196115A (en) * | 1986-02-21 | 1987-08-29 | Honda Motor Co Ltd | Molding of molded hole and molding equipment thereof |
| JPH01171908A (en) * | 1987-12-28 | 1989-07-06 | Toshiba Corp | Metal mold |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010101123A1 (en) * | 2009-03-02 | 2010-09-10 | いすゞ自動車株式会社 | Casting device |
| FR2949363A1 (en) * | 2009-08-25 | 2011-03-04 | Peugeot Citroen Automobiles Sa | Pin for die casting, comprises a guiding part arranged in a mold bore, and a molding part to project in a mold cavity, where the guiding part has a zone and a recess of which a diameter is lower than a diameter of the guiding part |
| JP2016078118A (en) * | 2014-10-14 | 2016-05-16 | 現代自動車株式会社Ｈｙｕｎｄａｉ Ｍｏｔｏｒ Ｃｏｍｐａｎｙ | Core pin having function for preventing mixing of molten metal into pipe and casting apparatus using the same |
| JP2017094372A (en) * | 2015-11-26 | 2017-06-01 | 株式会社スグロ鉄工 | Core pin and metal mold for casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0780042B2 (en) | 1995-08-30 |
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