JP5011271B2 - Core pin - Google Patents

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JP5011271B2
JP5011271B2 JP2008326670A JP2008326670A JP5011271B2 JP 5011271 B2 JP5011271 B2 JP 5011271B2 JP 2008326670 A JP2008326670 A JP 2008326670A JP 2008326670 A JP2008326670 A JP 2008326670A JP 5011271 B2 JP5011271 B2 JP 5011271B2
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pipe
hole
diameter
flow path
pin
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JP2010149124A (en
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徹一 山根
稔 中元
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Ryobi Ltd
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Description

本発明は、鋳抜きピンに関し、特に、内部に冷却パイプが配設される鋳抜きピンに関するものである。   The present invention relates to a core pin, and particularly to a core pin in which a cooling pipe is disposed.

ダイカスト法等の鋳造法により製品を鋳造する場合、金型には鋳抜きピンが配置される場合がある。鋳抜きピンは金型のキャビティ内に充填される金属溶湯の熱により高温となるので、成形される製品が焼き付いたり、歪んだりして不良品となってしまう場合がある。従って、下記特許文献1所載のように、鋳抜きピン(中子ピン)の内部に内パイプと外パイプからなる冷却パイプを配設することにより、鋳抜きピンを冷却することが知られている。
特開2000−141010号公報(図4)
When a product is cast by a casting method such as a die casting method, a die pin may be disposed on the mold. Since the core pin becomes high temperature due to the heat of the molten metal filled in the cavity of the mold, the molded product may be burned or distorted, resulting in a defective product. Accordingly, it is known to cool the core pin by disposing a cooling pipe composed of an inner pipe and an outer pipe inside the core pin (core pin) as described in Patent Document 1 below. Yes.
Japanese Unexamined Patent Publication No. 2000-141010 (FIG. 4)

しかしながら、特許文献1のような鋳抜きピンは、冷却パイプを配置する穴の加工に手間を要するものであった。具体的には、特許文献1の図4のように鋳抜きピンには内パイプと外パイプからなる冷却パイプが配置されることが多いが、鋳抜きピンの基端から先端までの全長が長い場合、内パイプの先端部が配置される部分と、外パイプが配置される部分とを加工する為には非常に長い刃物を準備することが必要であり、穴の加工時間も長くなるという問題を有している。   However, the cast pin as in Patent Document 1 requires time and labor for processing the hole in which the cooling pipe is disposed. Specifically, as shown in FIG. 4 of Patent Document 1, a cooling pipe composed of an inner pipe and an outer pipe is often disposed on the casting pin, but the total length from the proximal end to the distal end of the casting pin is long. In this case, it is necessary to prepare a very long blade for processing the portion where the tip of the inner pipe is arranged and the portion where the outer pipe is arranged, and the processing time of the hole becomes long. have.

そこで本発明は上記従来の問題点に鑑みてなされ、冷却パイプを配置する穴の加工時間を短くすることができ、製造が容易な鋳抜きピンを提供することを課題とする。   Therefore, the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a cast pin that can shorten the processing time of the hole in which the cooling pipe is disposed and can be easily manufactured.

本発明は上記課題を解決すべくなされたものであって、外パイプ8の中に内パイプ9が同芯状に配設されて該外パイプ8と該内パイプ9との間の空間が外側流路7aとされ、該内パイプ9内部の空間が内側流路7bとされ、該内側流路7b又は該外側流路7aが冷却水の往路又は復路をなす冷却パイプ7が内部に配設される鋳抜きピン4において、該鋳抜きピン4は、熱間ダイス鋼からなる第一の部材5と、一般構造用鋼材からなる第二の部材6とが一体化されることにより構成されており、該第一の部材5には、該内パイプ9の一端9aが配置される小径穴5fと、該外パイプ8の一端8aが固定される大径穴5eとが形成され、該第二の部材6は該大径穴5eの内径よりも大きな内径を有した円筒である鋳抜きピン4を提供している。
The present invention was made to solve the above problems, the inner pipe 9 into the outer pipe 8 is arranged coaxially shaped space between the outer pipe 8 and inner pipe 9 outside A flow path 7a is formed, a space inside the inner pipe 9 is defined as an inner flow path 7b, and a cooling pipe 7 in which the inner flow path 7b or the outer flow path 7a forms a forward path or a return path of cooling water is disposed. In the cast pin 4, the cast pin 4 is configured by integrating a first member 5 made of hot die steel and a second member 6 made of a general structural steel material. , the said first member 5, a small-diameter hole 5f which one end 9a of the inner pipe 9 are arranged, a large-diameter hole 5e one end 8a of the outer pipe 8 is fixed is formed, said second The member 6 provides a cast pin 4 which is a cylinder having an inner diameter larger than the inner diameter of the large-diameter hole 5e.

本発明の鋳抜きピンによれば、鋳抜きピンの基端から先端までの全長が長い場合等に、冷却パイプを配置する穴の加工が容易であり、鋳抜きピンを安価に製造することができる。   According to the core pin of the present invention, when the total length from the base end to the tip end of the core pin is long, the hole for arranging the cooling pipe is easy to process, and the core pin can be manufactured at low cost. it can.

本発明の一実施形態にかかる鋳抜きピンについて図面を用いて説明する。図1はダイカスト金型に設置された鋳抜きピンを示す断面図である。   A cast pin according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a core pin installed in a die casting mold.

図1に示されるように、ダイカスト金型1は、固定ホルダー2aと該固定ホルダー2aに収容された固定ダイス2bとからなる固定型2を備えている。該固定型2は、可動ホルダーと該可動ホルダーに収容された可動ダイスとからなる図示せぬ可動型と共にキャビティ3を画成する。固定ホルダー2aには略筒状の図示せぬスリーブが設けられており、スリーブ内に給湯されたアルミニウム合金等の金属溶湯を図示せぬプランジャチップによりキャビティ3に充填可能になっている。   As shown in FIG. 1, the die-casting mold 1 includes a fixed mold 2 including a fixed holder 2a and a fixed die 2b accommodated in the fixed holder 2a. The fixed mold 2 defines a cavity 3 together with a movable mold (not shown) composed of a movable holder and a movable die housed in the movable holder. The fixed holder 2a is provided with a substantially cylindrical sleeve (not shown), and the cavity 3 can be filled with a molten metal such as an aluminum alloy supplied into the sleeve by a plunger tip (not shown).

固定ダイス2bに形成された鋳抜きピン配置孔2cにはダイカスト品に穴部を形成する為の鋳抜きピン4が配置されている。鋳抜きピン4は、SKD6又はSKD61等の熱間ダイス鋼からなる第一の部材5と、刃物加工が容易であり、熱間ダイス鋼と比べて安価なSS400等の一般構造用鋼材からなる第二の部材6とを溶接して一体化することにより構成されている。尚、第一の部材5には表面処理が施されているが、第二の部材6には表面処理は施されていない。   A core pin 4 for forming a hole in the die cast product is disposed in the core pin arrangement hole 2c formed in the fixed die 2b. The cast pin 4 includes a first member 5 made of hot die steel such as SKD6 or SKD61 and a first member 5 made of general structural steel such as SS400 that is easy to cut and is cheaper than hot die steel. It is constituted by welding and integrating the second member 6. The first member 5 is subjected to surface treatment, but the second member 6 is not subjected to surface treatment.

第一の部材5は、円柱状の係止段部5aと、該係止段部5aよりも小径な本体部5bと、キャビティ3に突出してダイカスト品に穴部を成形する先細りのテーパ部5cとを有している。又、第一の部材5には、後述の冷却パイプ7が挿入される冷却穴5dが形成されている。冷却穴5dは、軸芯に垂直な面で切った断面がいずれの位置においても円形をなし、第一の部材5の基端から先端に向けて形成されている。冷却穴5dは、第一の部材5の基端から先端に向けて所定位置に至るまで一定の径を有する大径穴5eと、これよりも先の部分であり、大径穴5eよりも径の小さい小径穴5fとからなっている。小径穴5fと大径穴5eを備える冷却穴5dは、刃物加工により形成される。大径穴5eの径の大きさは、後述する外パイプ8の外径と略同一であり、内面には図示せぬ雌ネジが螺刻されている。   The first member 5 includes a cylindrical locking step portion 5a, a main body portion 5b having a smaller diameter than the locking step portion 5a, and a tapered portion 5c that projects into the cavity 3 and forms a hole in a die-cast product. And have. The first member 5 has a cooling hole 5d into which a cooling pipe 7 described later is inserted. The cooling hole 5d has a cross-section cut by a plane perpendicular to the shaft core in a circular shape at any position, and is formed from the proximal end of the first member 5 toward the distal end. The cooling hole 5d is a large-diameter hole 5e having a constant diameter from the proximal end to the distal end of the first member 5 and reaching a predetermined position, and a portion beyond this, and has a diameter larger than that of the large-diameter hole 5e. The small-diameter hole 5f is small. The cooling hole 5d including the small diameter hole 5f and the large diameter hole 5e is formed by blade processing. The diameter of the large-diameter hole 5e is substantially the same as the outer diameter of the outer pipe 8 described later, and a female screw (not shown) is threaded on the inner surface.

第二の部材6は円筒であり、外径の大きさは係止段部5aの外径と略同一であり、内径の大きさは大径部5eの径よりも大きくなっている。又、第二の部材6の内径は後述する冷却パイプ7の外パイプ8の外径よりも大きくなっている。第二の部材6の一端は第一の部材5の係止段部5aと溶接されており、他端は固定ホルダー2aの前面と当接している。鋳抜きピン4と略一致する形状の鋳抜きピン配置孔2c内に鋳抜きピン4が挿入され、第二の部材6の他端が固定ホルダー2aの前面に当接することにより、鋳抜きピン4は固定型2内において位置決めされて移動不能となっている。   The second member 6 is a cylinder, the outer diameter is substantially the same as the outer diameter of the locking step portion 5a, and the inner diameter is larger than the diameter of the large diameter portion 5e. The inner diameter of the second member 6 is larger than the outer diameter of the outer pipe 8 of the cooling pipe 7 described later. One end of the second member 6 is welded to the locking step portion 5a of the first member 5, and the other end is in contact with the front surface of the fixed holder 2a. The cast pin 4 is inserted into the cast pin arrangement hole 2c having a shape substantially coinciding with the cast pin 4, and the other end of the second member 6 is brought into contact with the front surface of the fixed holder 2a. Is positioned in the fixed mold 2 and cannot be moved.

冷却穴5dに挿入される冷却パイプ7は、外パイプ8の中に内パイプ9が同芯状に配設されて構成されており、外パイプ8と内パイプ9との間の空間が外側流路7aとされ、内パイプ9内部の空間が内側流路7bとされる。冷却パイプ8は、冷却穴5dの小径穴5fに内パイプ9の一端9aが位置するように配置され、内パイプ9の一端9aは小径穴5f内において開口する。また、外パイプ8の一端8a近傍の外周面には図示せぬ雄ネジが螺刻されており、この雄ネジが大径穴5eの内面に螺刻されている雌ネジに螺合して大径穴5eの内面に固定される。外パイプ8の一端8aは小径穴5fと連通して開口する。   The cooling pipe 7 inserted into the cooling hole 5d is configured such that the inner pipe 9 is concentrically arranged in the outer pipe 8, and the space between the outer pipe 8 and the inner pipe 9 is the outer flow. A path 7a is formed, and a space inside the inner pipe 9 is set as an inner flow path 7b. The cooling pipe 8 is arranged so that one end 9a of the inner pipe 9 is positioned in the small diameter hole 5f of the cooling hole 5d, and the one end 9a of the inner pipe 9 opens in the small diameter hole 5f. A male screw (not shown) is threaded on the outer peripheral surface in the vicinity of one end 8a of the outer pipe 8, and this male screw is screwed into a female screw threaded on the inner surface of the large-diameter hole 5e. It is fixed to the inner surface of the diameter hole 5e. One end 8a of the outer pipe 8 opens in communication with the small diameter hole 5f.

冷却パイプ7は、第二の部材6と固定ホルダー2aに形成された孔2dを貫通しており、内パイプ9と外パイプ8の他端9b、8bは固定ホルダー2aに形成された逃がし穴2f内まで延出し、それぞれ入水室10、出水室11に接続されている。入水室10に接続されたホース12は、図示せぬ冷却水供給装置に連通し、出水室11に接続されたホース13は、図示せぬ排水槽等に連通する。   The cooling pipe 7 passes through the hole 2d formed in the second member 6 and the fixed holder 2a, and the other ends 9b and 8b of the inner pipe 9 and the outer pipe 8 are escape holes 2f formed in the fixed holder 2a. It extends to the inside and is connected to the water inlet chamber 10 and the water outlet chamber 11, respectively. A hose 12 connected to the water inlet chamber 10 communicates with a cooling water supply device (not shown), and a hose 13 connected to the water outlet chamber 11 communicates with a drain tank (not shown).

本実施形態では、鋳抜きピン4が熱間ダイス鋼からなる第一の部材5と一般構造用鋼材からなる第二の部材6とを溶接により一体化することにより構成され、鋳抜きピン4の内部に配置される冷却パイプ7の外パイプ8の一端8aを第一の部材の大径穴5eにおいて固定するようにし、第二の部材6を外パイプ8の外径よりも大きな内径を有する円筒にしたので、熱間ダイス鋼に対して刃物加工で穴を形成する長さを第二の部材6の全長分だけ短くすることができる。また、第二の部材6を一般構造用鋼材としたので、鋳抜きピン4の全体を熱間ダイス鋼とした場合に比べて鋳抜きピン4を安価に製造することができる。   In the present embodiment, the core pin 4 is configured by integrating the first member 5 made of hot die steel and the second member 6 made of general structural steel by welding. One end 8 a of the outer pipe 8 of the cooling pipe 7 disposed inside is fixed in the large-diameter hole 5 e of the first member, and the second member 6 is a cylinder having an inner diameter larger than the outer diameter of the outer pipe 8. As a result, the length of the hole formed in the hot die steel by the blade processing can be shortened by the entire length of the second member 6. Further, since the second member 6 is made of a general structural steel material, the core pin 4 can be manufactured at a lower cost than when the entire core pin 4 is hot die steel.

本発明による鋳抜きピンは上述した実施形態に限定されず、特許請求の範囲に記載した範囲で種々の変形や改良が可能である。例えば、上述した実施形態では、内側流路7b、外側流路7aはそれぞれ冷却水の往路、復路をなしていたが、外側流路が往路をなし、内側流路が復路をなすようにしてもよい。   The core pin according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in the above-described embodiment, the inner flow path 7b and the outer flow path 7a form the forward path and the return path of the cooling water, respectively, but the outer flow path forms the forward path and the inner flow path forms the return path. Good.

また、上述した実施形態では、外パイプ8の一端8a近傍の外周面には雄ネジが螺刻されており、この雄ネジが大径穴5eの内面に螺刻されている雌ネジに螺合することにより外パイプ8の一端が大径穴5eの内面に固定されていたが、外パイプの一端近傍の外周面にOリングを配置し、外パイプの一端を大径穴に圧入して固定するようにしてもよい。   In the embodiment described above, a male screw is threaded on the outer peripheral surface near the one end 8a of the outer pipe 8, and this male screw is screwed into a female screw threaded on the inner surface of the large-diameter hole 5e. As a result, one end of the outer pipe 8 was fixed to the inner surface of the large-diameter hole 5e, but an O-ring was placed on the outer peripheral surface near one end of the outer pipe, and one end of the outer pipe was pressed into the large-diameter hole and fixed. You may make it do.

また、上述した実施形態では、鋳抜きピン4は固定型2に配置されていたが、可動型や中子に配置されてもよい。   In the above-described embodiment, the core pin 4 is disposed on the fixed mold 2, but may be disposed on a movable mold or a core.

本実施形態に係る鋳抜きピンがダイカスト金型に設置された状態を示す断面図である。It is sectional drawing which shows the state in which the core pin which concerns on this embodiment was installed in the die-casting metal mold | die.

符号の説明Explanation of symbols

1 ダイカスト金型
2 固定型
3 キャビティ
4 鋳抜きピン
5 第一の部材
5a 係止段部
5b 本体部
5c テーパ部
5d 冷却穴
5e 大径穴
5f 小径穴
6 第二の部材
7 冷却パイプ
7a 外側流路
7b 内側流路
8 外パイプ(外パイプ部)
8a 一端
9 内パイプ(内パイプ部)
9a 一端
DESCRIPTION OF SYMBOLS 1 Die-cast metal mold | die 2 Fixed type | mold 3 Cavity 4 Casting pin 5 1st member 5a Locking step part 5b Main body part 5c Tapered part 5d Cooling hole 5e Large diameter hole 5f Small diameter hole 6 2nd member 7 Cooling pipe 7a Outer flow Road 7b Inner flow path 8 Outer pipe (outer pipe part)
8a one end 9 inner pipe (inner pipe part)
9a one end

Claims (1)

外パイプの中に内パイプが同芯状に配設されて該外パイプと該内パイプとの間の空間が外側流路とされ、該内パイプ内部の空間が内側流路とされ、該内側流路又は該外側流路が冷却水の往路又は復路をなす冷却パイプが内部に配設される鋳抜きピンにおいて、該鋳抜きピンは、熱間ダイス鋼からなる第一の部材と、一般構造用鋼材からなる第二の部材とが一体化されることにより構成されており、該第一の部材には、該内パイプの一端が配置される小径穴と、該外パイプの一端が固定される大径穴とが形成され、該第二の部材は該大径穴の内径よりも大きな内径を有した円筒であることを特徴とする鋳抜きピン。 An inner pipe is disposed concentrically in the outer pipe, a space between the outer pipe and the inner pipe is an outer flow path, and a space inside the inner pipe is an inner flow path, A cast pin in which a cooling pipe in which the flow path or the outer flow path forms a forward or backward flow of cooling water is disposed, the cast pin includes a first member made of hot die steel and a general structure a second member made of use steel is constituted by being integrated to the said first member, and a small diameter hole to which one end of the inner pipes is arranged, one end of the outer pipe fixed A die-casting pin, wherein the second member is a cylinder having an inner diameter larger than an inner diameter of the large-diameter hole.
JP2008326670A 2008-12-23 2008-12-23 Core pin Active JP5011271B2 (en)

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Publication number Priority date Publication date Assignee Title
KR101112620B1 (en) * 2011-06-10 2012-02-14 한연수 seperable mold fin
CN104439154A (en) * 2014-12-26 2015-03-25 东莞市东升压铸模具有限公司 Fixed point type cooling water channel die-casting mold
CN110625087B (en) * 2019-09-26 2022-03-11 浙江华朔科技股份有限公司 Die casting die of integrated water pipe in take-up housing bottom
CN111702146A (en) * 2020-06-30 2020-09-25 江苏理工学院 Electromagnetic valve jet type cooling device for aluminum alloy die-casting die core

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JPH0234266A (en) * 1988-07-22 1990-02-05 Honda Motor Co Ltd Pin for hole as cast
JPH091313A (en) * 1995-06-15 1997-01-07 Aichi Mach Ind Co Ltd Pin for hole as cast in aluminum alloy casting and method for controlling temperature thereof
JPH11320067A (en) * 1998-05-19 1999-11-24 Hitachi Metals Ltd Molten metal contactor having inner cooling hole and its manufacture
JP4356123B2 (en) * 1998-09-25 2009-11-04 アイシン精機株式会社 Core pin for casting
JP2000141010A (en) * 1998-11-10 2000-05-23 Ahresty Corp Cooling tube for die

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