JPS6368256A - Preparation of die for pressing work - Google Patents
Preparation of die for pressing workInfo
- Publication number
- JPS6368256A JPS6368256A JP21241586A JP21241586A JPS6368256A JP S6368256 A JPS6368256 A JP S6368256A JP 21241586 A JP21241586 A JP 21241586A JP 21241586 A JP21241586 A JP 21241586A JP S6368256 A JPS6368256 A JP S6368256A
- Authority
- JP
- Japan
- Prior art keywords
- cooling pipe
- die
- mold
- plug
- press 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.)
- Pending
Links
- 238000003825 pressing Methods 0.000 title abstract 4
- 238000001816 cooling Methods 0.000 claims abstract description 72
- 238000005266 casting Methods 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 239000004576 sand Substances 0.000 abstract description 4
- 239000000314 lubricant Substances 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000005187 foaming Methods 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 229920006328 Styrofoam Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000008261 styrofoam Substances 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- -1 composed of fufu Substances 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
Landscapes
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、冷却用通路を内部に有するプレス金型の製作
方法に関し、特に、冷却用通路として冷却用パイプを鋳
包んだプレス金型の製作方法に係わる。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a press mold having a cooling passage therein, and particularly to a method for manufacturing a press mold in which a cooling pipe is cast as a cooling passage. It is related to the production method.
プレス金型に冷却用通路を設ける場合、このプレス金型
を鋳造により製造した後、機械加工により穴明けを行っ
て冷却用通路を形成する方法、あるいは、第３図に示す
ように、プレス金型５１を鋳造する際に、冷却用通路と
しての冷却用パイプ５２を一緒に鋳包んでしまう方法が
ある。When providing a cooling passage in a press mold, there is a method in which the press mold is manufactured by casting and then holes are formed by machining to form the cooling passage, or as shown in Fig. 3, the press mold is manufactured by casting. When casting the mold 51, there is a method in which a cooling pipe 52 serving as a cooling passage is cast together.
この内、前者の機械加工によりプレス金型に冷却用通路
を形成する方法としては、例えば、実開昭６０−１６０
９５５号公報、実開昭５９−１２００３０号公報に開示
されているように、プレス金型が小型の場合は、貫通穴
を形成して、この貫通穴の端部に、配管用の雌ねじのタ
ップ加工を行い、プレス金型が大型の場合は、複数の箇
所に未貫通の穴明けを行い、その穴の中に給・排水用の
パイプを挿入固定する方法がある。Among these, the former method of forming a cooling passage in a press mold by machining is, for example,
As disclosed in Publication No. 955 and Japanese Utility Model Application Publication No. 59-120030, when the press mold is small, a through hole is formed and a female thread tap for piping is inserted at the end of the through hole. If the press mold is large during processing, there is a method of drilling blank holes in multiple locations and inserting and fixing pipes for supply and drainage into the holes.
また、後者の第３図に示すプレス金型５１に冷却用通路
としての冷却用パイプ５２を鋳包む方法としては、第４
図乃び第５図に示す方法があり、これは、先ず第４図に
示すように、冷却用パイプ５２を、発砲スチロール等で
製作した金型模型本体５３の中に埋め込み、この冷却用
パイプ５２を、第３図に示すプレス金型５１の金型本体
５４内に一諸に鋳包む。Further, as a method of casting a cooling pipe 52 as a cooling passage into a press mold 51 shown in the latter FIG.
There is a method shown in FIG. 52 is cast all together in the mold body 54 of the press mold 51 shown in FIG.
そして、この冷却用パイプ５２を、第３図のプレス金型
５１の金型本体５４内に鋳包んだ後、第５図に示すよう
に、冷却用パイプ５２の内面に、配管用の雌ねじ５２Ａ
を、タップ５５によりタップ加工して形成している。After this cooling pipe 52 is cast inside the mold body 54 of the press mold 51 shown in FIG. 3, as shown in FIG.
is formed by tapping with a tap 55.
しかし、前記従来のプレス金型の製作方法の内、実開昭
６０−１６０９５５号公報、実開昭５９−１２００３０
号公報に開示されているような方法は、鋳造後、機械加
工を行うため、製作コストが高くつく、あるいは、冷却
用通路が直線とならざるを得す、冷却用通路の位置が最
適な位置に設定出来ない場合があり、冷却状態が不均一
になると云う問題がある。However, among the above-mentioned conventional press mold manufacturing methods, there are
In the method disclosed in the above publication, machining is performed after casting, which results in high manufacturing costs, or requires the cooling passage to be in a straight line. In some cases, it may not be possible to set the temperature to the desired temperature, and there is a problem that the cooling state becomes uneven.
また、第４図乃び第５図に示すように冷却用パイプ５２
を鋳包んで、この冷却用パイプ５２の端部に、配管用の
雌ねじ５２Ａをタップ加工する方法では、鋳造時に、冷
却用パイプ５２の端部が、溶湯からこの冷却用パイプ５
２を伝わってくる熱で、肌荒れや材質変化を起こしてし
まい、タップの加工性が悪いと云う問題がある。In addition, as shown in FIGS. 4 and 5, a cooling pipe 52
In this method, the end of the cooling pipe 52 is tapped from the molten metal to form a female thread 52A for piping at the end of the cooling pipe 52.
There is a problem in that the heat transmitted through the taps causes rough skin and changes in the material, resulting in poor tap workability.
さらに、プレス金型の場合、冷却用パイプを鋳包む位置
が限定されることが有り、また、第６図に示すように、
プレス金型５１の外面から突き出たこの冷却用パイプ５
２の軸線の延長線上や、その近傍に、このプレス金型５
１の一部５４Ａが干渉物として存在する場合が多く、こ
の干渉物のため、第７図に示すように、冷却用パイプ５
２への雌ねじのタップ加工が困難になり、そのためこの
冷却用パイプ５２の配設位置を変更せざるを得す、プレ
ス金型５１の冷却条件が犠牲になると云う問題がある。Furthermore, in the case of a press mold, the position where the cooling pipe is cast may be limited, and as shown in Figure 6,
This cooling pipe 5 protrudes from the outer surface of the press mold 51
This press mold 5 is placed on the extension line of the axis line of 2 or in the vicinity.
In many cases, a part 54A of the cooling pipe 5 exists as an interference object, and as shown in FIG.
This makes it difficult to tap the female thread into the hole 2, which necessitates changing the arrangement position of the cooling pipe 52, resulting in a problem in that the cooling conditions for the press die 51 are compromised.
したがって、本発明の目的は、プレス金型の製作におい
て、プレス金型の冷却用パイプの配設位置の制限をうけ
ることなく、冷却用パイプへのねじの加工を容易にする
ことにある。Therefore, an object of the present invention is to facilitate the processing of threads on a cooling pipe in the production of a press mold without being subject to restrictions on the placement position of the cooling pipe of the press mold.
そこで、本発明は、冷却用パイプをプレス金型に鋳包む
に際して、予めこの冷却用パイプの端部に配管用のねじ
の加工を施しておき、この加工を施した冷却用パイプを
プレス金型に鋳包むようにしたことを特徴とする。Therefore, in the present invention, when casting a cooling pipe into a press mold, the end of the cooling pipe is processed with threads for piping in advance, and the processed cooling pipe is placed in the press mold. It is characterized by being cast in a mold.
具体的には、冷却用パイプを鋳包んでプレス金型を製作
するプレス金型の製作方法であって、この冷却用パイプ
の両端部にねじを螺設した後、この冷却用パイプの両端
部に熱容量の高い金属製の埋栓を螺合させた状態で、こ
の冷却用パイプを鋳型にセットして鋳込んだ後、冷却用
パイプから、埋栓を取り外すようにしたことを特徴とす
る。Specifically, it is a press mold manufacturing method in which a press mold is manufactured by casting a cooling pipe, and after screws are screwed into both ends of this cooling pipe, both ends of this cooling pipe are The cooling pipe is set in a mold with a metal plug having a high heat capacity screwed thereto, and after casting, the plug is removed from the cooling pipe.
かかる本発明の構成によれば、冷却用パイプを鋳包む前
に、この冷却用パイプの両端に配管用のねじを加工する
ので、ねじの加工が容易であり、また、鋳造後のねじの
加工が不要となるので、この冷却用パイプの軸線上に干
渉物が存在していても、この冷却用パイプの配設の妨げ
にはならない。According to the configuration of the present invention, since piping threads are machined at both ends of the cooling pipe before the cooling pipe is cast, the threads can be easily machined, and the threads can be machined after casting. is not necessary, so even if there is an interference on the axis of the cooling pipe, it will not interfere with the arrangement of the cooling pipe.
Ｃ実施例〕
次に、本発明の一実施例に係わるプレス金型の製作方法
を、図面を参照しながら説明する。Embodiment C] Next, a method for manufacturing a press mold according to an embodiment of the present invention will be described with reference to the drawings.
第１図は本実施例に係わるプレス金型の製作方法を示す
鋳型の断面図、第２図は第１図の鋳型のＨの部分の拡大
図である。FIG. 1 is a sectional view of a mold showing a method of manufacturing a press mold according to this embodiment, and FIG. 2 is an enlarged view of a portion H of the mold in FIG. 1.
第１図において、符号１は冷却用パイプであり、その両
端部には、第２図に示すように、配管用の雌ねじＩＩＡ
がタップ加工により内面に形成された配管部品取り付は
部１１が、熱伝導率の低い物質で形成された遮熱部材１
２を間に介して固定されている。In FIG. 1, reference numeral 1 is a cooling pipe, and as shown in FIG.
The piping component mounting portion 11 formed on the inner surface by tapping is the heat shield member 1 formed of a material with low thermal conductivity.
2 is fixed in between.
符号２はその両端に螺合された熱容量の高い金属である
真鍮類の埋栓であり、その一端には、前記冷却用パイプ
１の雌ねじＩＩＡと同径の雄ねじ２人が形成され、他端
には断面六角形の六角穴２Ｂが形成されている。Reference numeral 2 designates a plug made of brass, which is a metal with a high heat capacity, screwed onto both ends of the plug, and one end of which has two male threads having the same diameter as the female thread IIA of the cooling pipe 1, and the other end. A hexagonal hole 2B having a hexagonal cross section is formed in the hexagonal hole 2B.
符号３はプレス金型と同形の金型模型であり、発泡スチ
ロールで製作している。Reference numeral 3 is a mold model having the same shape as the press mold, and is made of styrofoam.
符号４はこの発泡スチロール製の金型模型３の周りを囲
むようにして砂込めされた鋳物砂である。Reference numeral 4 denotes foundry sand filled in so as to surround the mold model 3 made of expanded polystyrene.
前記のパイプ状の配管部品取り付は部１１の内面に、配
管用の雌ねじＩＩＡをタップ加工により形成して、この
配管部品取り付は部１１を、熱伝導率の低い物質で形成
されたパイプ状の遮熱部材１２を間に介して、冷却用パ
イプ１の両端に固定する。To attach the pipe-shaped piping component described above, a female thread IIA for piping is formed on the inner surface of the section 11 by tapping, and to attach the piping component, the section 11 is attached to a pipe made of a material with low thermal conductivity. The cooling pipe 1 is fixed to both ends of the cooling pipe 1 with a heat shielding member 12 having a shape in between.
そして、この冷却用パイプ１の雌ねじＩＩＡ、及び、前
記埋栓２の雄ねじ２Ａに、フフッ、黒鉛、ジルコニアを
主成分とする焼付防止剤と潤滑剤との混合剤を塗布して
、これら両者を螺合した状態で、発泡スチロール類の金
型模型３の所定の位置に埋め込み、この冷却用パイプ１
が埋め込まれた発泡スチロール類の金型模型３の周りを
、湯道５Ａ及びせき５Ｂのための空間を確保しつつ、鋳
物砂４を砂込めする。Then, a mixture of an anti-seize agent and a lubricant mainly composed of fufu, graphite, and zirconia is applied to the female thread IIA of the cooling pipe 1 and the male thread 2A of the plug 2, so that both of them are In the screwed state, the cooling pipe 1 is embedded in a predetermined position in a mold model 3 made of styrofoam.
The molding sand 4 is poured around the mold model 3 made of polystyrene foam in which is embedded, while securing a space for the runner 5A and the weir 5B.
そして、出来上がった鋳型５に注湯すると、溶湯Ａは、
湯道５Ａ及びせき５Ｂを通って、発泡スチロール類の金
型模型３にいたり、この金型模型３を焼失させながら、
この金型模型３が占めていた空間に充填され、前記冷却
用パイプ１を鋳包んだプレス金型が出来上がる。Then, when poured into the completed mold 5, the molten metal A becomes
Passing through the runner 5A and the weir 5B, it reaches the mold model 3 of Styrofoam, and while burning out the mold model 3,
The space occupied by this mold model 3 is filled, and a press mold in which the cooling pipe 1 is cast is completed.
そして、鋳造後、プレス金型に鋳包まれた冷却用パイプ
１から、埋栓２を取り外すと、プレス金型が完成する。After casting, the plug 2 is removed from the cooling pipe 1 cast into the press mold to complete the press mold.
次に、本実施例の作用について説明する。Next, the operation of this embodiment will be explained.
注湯時、注湯された溶湯が、発泡スチロール類の金型模
型３内へ流入してきた時、溶湯からの熱ａが冷却用パイ
プ１内を伝導してきた熱すは、この冷却用パイプ１の端
部に介在させている遮熱部材１２で遮られて、配管部品
取り付は部１１への熱伝導量が小さくなる。During pouring, when the poured molten metal flows into the Styrofoam mold model 3, the heat a from the molten metal is transferred through the cooling pipe 1. It is blocked by the heat shielding member 12 interposed at the end, and the amount of heat conducted to the section 11 is reduced when the piping parts are attached.
また、溶湯から鋳物砂４を伝わってくる熱Ｃは、配管部
品取り付は部１１に伝わってくるが、この配管部品取り
付は部１１に締結されている埋栓２の熱容量が大きいた
め、この埋栓２に吸収されてしまう。In addition, the heat C transmitted from the molten metal through the foundry sand 4 is transmitted to the part 11 when the piping parts are attached, but this piping part is attached because the heat capacity of the plug 2 fastened to the part 11 is large. It will be absorbed into this plug 2.
さらに、この冷却用パイプ１の配管部品取り付は部１１
、及び、埋栓２の温度が上昇しても、その雌ねじＩＩＡ
、及び、雄ねじ２Ａに塗布されている焼付防止剤と潤滑
剤との混合剤により、両者の焼付が防止される。Furthermore, the piping parts of this cooling pipe 1 are attached to the section 11.
, and even if the temperature of the plug 2 rises, its internal thread IIA
, and the mixture of anti-seize agent and lubricant applied to the male thread 2A prevents seizure of both.
その結果、雌ねじＩＩＡのねし山部の焼きブレの少ない
冷却用パイプ１を鋳包んだプレス金型が得られる。As a result, a press mold is obtained in which the cooling pipe 1 is cast in which the threaded portion of the internal thread IIA has less shrinkage and wobbling.
本実施例の場合、鋳造時に、冷却用パイプ１の開口端部
である配管部品取り付は部１１を、熱容量の大きい金属
である真鍮製の埋栓２で塞いでいるので、鋳造時の鋳物
砂４が冷却用パイプｌへの侵入するのを阻止できるとと
もに、配管部品取り付は部１１の温度上昇を抑えること
が出来る。In the case of this embodiment, the opening end of the cooling pipe 1, which is the piping component mounting part 11, is closed with a plug 2 made of brass, which is a metal with a large heat capacity, so that the casting The sand 4 can be prevented from entering the cooling pipe 1, and the temperature rise in the section 11 can be suppressed by attaching the piping parts.
また、本実施例の場合、冷却用パイプ１を、配管部品取
り付は部１１で分割し、この配管部品取り付は部１１を
遮熱部材１２を介して、本体に固定するようにしたので
、鋳造時に溶湯からの熱がこの配管部品取り付は部１１
に伝達するのを抑制でき、この配管部品取り付は部１１
の温度上昇を抑制できる。In addition, in the case of this embodiment, the cooling pipe 1 is divided into parts 11 for installing piping parts, and for installing the piping parts, part 11 is fixed to the main body via the heat shielding member 12. , the heat from the molten metal during casting is attached to this piping part in part 11.
This piping component installation is carried out in part 11.
temperature rise can be suppressed.
なお、本実施例の場合、冷却用パイプ１の端部を埋栓２
で閉塞しているが、この埋栓２に軸方向に貫通穴を明け
、鋳造時の冷却流体用の配管を接続して、鋳造時に、冷
却用パイプ１の中に冷却流体を通すようにすると、この
冷却用パイプ１の熱変形が抑えられるとともに、溶湯の
冷却速度が早められ、生産性が向上する。In the case of this embodiment, the end of the cooling pipe 1 is plugged with a plug 2.
However, if a through hole is made in the axial direction in this plug 2 and a pipe for cooling fluid during casting is connected, the cooling fluid will be passed through the cooling pipe 1 during casting. , thermal deformation of the cooling pipe 1 is suppressed, the cooling rate of the molten metal is accelerated, and productivity is improved.
以上、述べたように、かかる本発明によれば、プレス金
型に鋳包む冷却用パイプの端部に、鋳包む前に配管用の
ねじを形成させておき、このねじの部分を熱容量の大き
い金属製の埋栓で覆って塞いでおいて、鋳包むようにし
たので、この冷却用パイプの端部に形成するねじの加工
が容易で、且つ、熱変形による寸法精度の低下が抑えら
れると云う優れた効果を奏する。As described above, according to the present invention, a thread for piping is formed at the end of the cooling pipe to be cast into a press mold before casting, and the threaded part is connected to a large heat capacity. Since the cooling pipe is sealed with a metal plug and then cast, it is easy to machine the threads formed at the end of the cooling pipe, and it is said that the reduction in dimensional accuracy due to thermal deformation is suppressed. It has excellent effects.
また、鋳造後に、冷却通路の加工を行う必要が無いので
、冷却用パイプの開口端の０線の延長線上に干渉物が存
在していても、プレス金型内の冷却用パイプの配設位置
の制約をうけることが無くなると云う優れた効果を奏す
る。In addition, since there is no need to process the cooling passage after casting, even if there is an interfering object on the extension line of the zero line at the opening end of the cooling pipe, the location of the cooling pipe in the press mold This has the excellent effect of eliminating the constraints of
第１図は本発明の一実施例に係わるプレス金型の製作方
法を示す鋳型の断面図、第２図は第１図の鋳型の■の部
分の拡大図である。
第３図は冷却用パイプを鋳包んだプレス金型の一例の斜
視図である。
第４図及び第５図はプレス金型の製作方法の従来例を示
し、第４図は注湯中の鋳型の断面図、第５図は鋳造後の
プレス金型の冷却用パイプにねじの加工を行うことを示
すプレス金型の一部分の断面図である。
第６図は冷却用パイプを鋳包んだプレス金型の他の例の
斜視図、第７図は第６図のプレス金型の■視の断面図で
ある。
１ ・・・・冷却用パイプ
１１Ａ ・・・・雌ねじ（ねじ）
２ ・・・・埋栓
５ ・・・・鋳型
出願人 トヨタ自動車株式会社
１−：＠去Ｐ町汀プ
５−ｍ−異型
第２図FIG. 1 is a cross-sectional view of a mold showing a method of manufacturing a press mold according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion of the mold shown in FIG. 1. FIG. 3 is a perspective view of an example of a press mold in which a cooling pipe is cast. Figures 4 and 5 show a conventional method for manufacturing press molds, with Figure 4 being a cross-sectional view of the mold during pouring, and Figure 5 showing screws installed in the cooling pipe of the press mold after casting. It is a sectional view of a part of a press die showing processing. FIG. 6 is a perspective view of another example of a press mold in which a cooling pipe is cast, and FIG. 7 is a cross-sectional view of the press mold shown in FIG. 1...Cooling pipe 11A...Female thread (screw) 2...Plug 5...Mold applicant Toyota Motor Corporation 1-:@KoP-machipu 5-m-variant type Figure 2
Claims (1)
型の製作方法であって、該冷却用パイプの両端部にねじ
を螺設した後、該冷却用パイプの両端部に熱容量の高い
金属製の埋栓を螺合させた状態で、該冷却用パイプを鋳
型にセットして鋳込んだ後、該冷却用パイプより前記埋
栓を取り外すようにしたことを特徴とするプレス金型の
製作方法。A press mold manufacturing method in which a press mold is manufactured by casting a cooling pipe, the method comprising: screwing screws into both ends of the cooling pipe, and then inserting a metal having a high heat capacity into both ends of the cooling pipe. Production of a press mold characterized in that, after the cooling pipe is set in a mold and cast with a screwed plug made of aluminum, the plug is removed from the cooling pipe. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21241586A JPS6368256A (en) | 1986-09-09 | 1986-09-09 | Preparation of die for pressing work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21241586A JPS6368256A (en) | 1986-09-09 | 1986-09-09 | Preparation of die for pressing work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6368256A true JPS6368256A (en) | 1988-03-28 |
Family
ID=16622207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21241586A Pending JPS6368256A (en) | 1986-09-09 | 1986-09-09 | Preparation of die for pressing work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6368256A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0235280A (en) * | 1988-07-21 | 1990-02-05 | Hiroshige Sangyo Kk | Manufacture of coolant opening/closing valve body in cooling and warming device |
| KR101185018B1 (en) | 2009-12-24 | 2012-10-02 | 주식회사 포스코 | Manufacturing method of mould for hot press forming and apparatus thereof |
| CN105983679A (en) * | 2014-10-14 | 2016-10-05 | 现代自动车株式会社 | Core pin for preventing molten metal from flowing into pipe and casting device using the same |
| JP2021159935A (en) * | 2020-03-31 | 2021-10-11 | 株式会社キーレックス | Manufacturing method of hot press forming die and hot press forming die |
-
1986
- 1986-09-09 JP JP21241586A patent/JPS6368256A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0235280A (en) * | 1988-07-21 | 1990-02-05 | Hiroshige Sangyo Kk | Manufacture of coolant opening/closing valve body in cooling and warming device |
| KR101185018B1 (en) | 2009-12-24 | 2012-10-02 | 주식회사 포스코 | Manufacturing method of mould for hot press forming and apparatus thereof |
| CN105983679A (en) * | 2014-10-14 | 2016-10-05 | 现代自动车株式会社 | Core pin for preventing molten metal from flowing into pipe and casting device using the same |
| CN105983679B (en) * | 2014-10-14 | 2020-05-12 | 现代自动车株式会社 | Center pin for preventing molten metal from flowing into pipe and casting device using the same |
| JP2021159935A (en) * | 2020-03-31 | 2021-10-11 | 株式会社キーレックス | Manufacturing method of hot press forming die and hot press forming die |
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