JP2003088949A - Method for producing casting having slender hole as cast - Google Patents
Method for producing casting having slender hole as castInfo
- Publication number
- JP2003088949A JP2003088949A JP2001284561A JP2001284561A JP2003088949A JP 2003088949 A JP2003088949 A JP 2003088949A JP 2001284561 A JP2001284561 A JP 2001284561A JP 2001284561 A JP2001284561 A JP 2001284561A JP 2003088949 A JP2003088949 A JP 2003088949A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- core
- cast
- mold
- hole
- 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
Landscapes
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、変形の極めて少な
い細長鋳ぬき穴を有する鋳物を製造する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a casting having an elongated casting hole with very little deformation.
【0002】[0002]
【従来の技術】例えば、鋳物製の油圧装置には、作動油
を装置内の必要な部位に循環供給するための細い管部或
いは溝部が設けられている。従来、このような鋳物製の
装置や部品への細い管部や溝部の形成は、鋳造後、ロン
グドリルなどを用いる後加工により行われている。ま
た、鋳物にやや太い管部や溝部を形成する場合は、予め
鋳型内に中子としてスチール管を配設して、鋳造により
製造している。2. Description of the Related Art For example, a hydraulic apparatus made of casting is provided with a thin pipe section or groove section for circulating and supplying hydraulic oil to a necessary portion in the apparatus. Conventionally, the formation of thin pipes and grooves on such cast devices and parts has been performed by post-processing using a long drill or the like after casting. Further, in the case of forming a slightly thick pipe portion or groove portion in a casting, a steel pipe is disposed as a core in a mold in advance and the casting is performed.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、鋳物に
ロングドリルなどを用いて細長い穴をあける方法には、
ロングドリルが加工作業中に折損したり、穴あけ作業に
長い時間がかかるといった問題がある。また、スチール
管中子を用いて管部や溝部を有する鋳物を鋳造する方法
は、細い管部や溝部を形成する場合には、屈曲や歪みが
大きくなり過ぎて実用的でないという問題がある。However, the method of making a long hole in a casting using a long drill or the like is
There are problems that the long drill breaks during processing and that it takes a long time for drilling. Further, the method of casting a casting having a tube portion or a groove portion using a steel tube core has a problem that when forming a thin tube portion or a groove portion, the bending and distortion become too large and not practical.
【0004】本発明の目的は、曲がりや歪みなどの変形
の極めて少ない細長い鋳ぬき穴を有する鋳物を簡易かつ
経済的に製造する方法を提供することである。An object of the present invention is to provide a method for easily and economically producing a casting having an elongated casting hole with extremely small deformation such as bending and distortion.
【0005】[0005]
【課題を解決するための手段】前記目的を達成するため
に、本発明は、非金属無機質細管又は棒状中子を配設し
た鋳型内に鋳造用金属溶湯を注湯し、冷却し、次いで解
枠した後、前記非金属無機質細管又は棒状中子を除去す
ること、を特徴とする細長鋳ぬき穴を有する鋳物の製造
方法である。In order to achieve the above-mentioned object, the present invention is a method of pouring a molten metal for casting into a mold in which a non-metal inorganic thin tube or a rod-shaped core is arranged, cooling, and then unmelting. The method for producing a casting having an elongated cast hole, characterized in that the nonmetallic inorganic thin tube or the rod-shaped core is removed after being framed.
【0006】本発明は、前記非金属無機質細管又は棒状
中子が軟化点300〜1600℃を有するものである、
前記の細長鋳ぬき穴を有する鋳物の製造方法である。According to the present invention, the non-metal inorganic thin tube or rod-shaped core has a softening point of 300 to 1600 ° C.
It is a method of manufacturing a casting having the elongated casting hole.
【0007】本発明は、前記非金属無機質細管又は棒状
中子が石英細管中子である、前記の細長鋳ぬき穴を有す
る鋳物の製造方法である。The present invention is the method for producing a casting having the above-mentioned elongated casting hole, wherein the non-metal inorganic thin tube or rod-shaped core is a quartz thin tube core.
【0008】[0008]
【発明の実施の形態】以下に本発明を詳しく説明する。
本発明における中子は、黒鉛棒(特に電極黒鉛棒)、砂
をフェノール樹脂などの樹脂で固化した棒、石英管、各
種ガラス管、黒鉛被覆金属棒などの非金属無機質細管又
は細棒である。これらのうち、鋳造後に変形が少なく、
除去しやすい点から、石英細管が最も好ましい。また、
この非金属無機質細管又は細棒は軟化点が300〜16
00℃、更に600〜1600℃、特に1400〜15
50℃のものが好ましい。更に、非金属無機質細管又は
細棒は、具体的には、外径(直径)が1〜20mm、更
には3〜10mm、長さが500mm以下、更には10
0〜300mmであることが、本発明の方法に使用する
のに適している。外径が1mm未満であると、鋳造の際
に変形が大きくなり、外径が20mmを超えると、ロン
グドリルを用いる後加工方法やスチール管中子を用いる
鋳造方法によるほうが経済的であり、また製造(加工)
も容易である。BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.
The core in the present invention is a graphite rod (particularly an electrode graphite rod), a rod obtained by solidifying sand with a resin such as phenol resin, a quartz pipe, various glass pipes, a non-metal inorganic thin pipe or a thin rod such as a graphite-coated metal rod. . Of these, there is little deformation after casting,
Quartz thin tubes are most preferable because they are easily removed. Also,
This non-metal inorganic thin tube or thin rod has a softening point of 300 to 16
00 ° C, further 600 to 1600 ° C, especially 1400 to 15
It is preferably at 50 ° C. Further, the non-metal inorganic thin tube or thin rod has an outer diameter (diameter) of 1 to 20 mm, further 3 to 10 mm, and a length of 500 mm or less, further 10
A value of 0 to 300 mm is suitable for use in the method of the present invention. If the outer diameter is less than 1 mm, the deformation during casting becomes large, and if the outer diameter exceeds 20 mm, it is more economical to use a post-processing method using a long drill or a casting method using a steel pipe core. Manufacturing (processing)
Is also easy.
【0009】本発明における鋳造用金属としては、各種
鋳鉄、アルミニウム、亜鉛、これらの合金などを挙げる
ことができるが、特に本発明の方法には各種の鋳鉄が適
している。As the casting metal in the present invention, various cast irons, aluminum, zinc, alloys thereof and the like can be mentioned, and various cast irons are particularly suitable for the method of the present invention.
【0010】鋳造した鋳物から非金属無機質細管又は棒
状中子を除去するには、コンクリートの穴あけなどに使
用される通常のドリルにより中子を破砕しながら貫通し
て、鋳物に細長鋳ぬき穴を容易に形成することができ
る。In order to remove non-metal inorganic thin tubes or rod-shaped cores from a cast product, the core is crushed and pierced by an ordinary drill used for drilling concrete, and an elongated cast hole is formed in the cast product. It can be easily formed.
【0011】[0011]
【実施例】以下、実施例により本発明を更に詳細に説明
する。図1は、本発明の細長鋳ぬき穴を有する鋳物の製
造に使用する上型と下型の平面図である。図2は、図1
の上型と下型をセットした鋳型の(想像部分を含む)斜
視図である。図3は、図1の上型と下型をセットした鋳
型のA−A線における側断面図である。図4は、本発明
の方法により製造した鋳物の石英細管配設部における
(一部想像部分を含む)断面斜視図である。図5は、図
4に示す鋳物から石英管を除去した状態を示す断面斜視
図である。図6は、鋳物の細長鋳ぬき穴の曲がり(歪
み)程度について説明するための断面図である。EXAMPLES The present invention will be described in more detail below with reference to examples. FIG. 1 is a plan view of an upper die and a lower die used for manufacturing a casting having an elongated casting hole according to the present invention. 2 is shown in FIG.
FIG. 3 is a perspective view (including an imaginary part) of a mold in which the upper mold and the lower mold are set. FIG. 3 is a side sectional view taken along line AA of the mold in which the upper mold and the lower mold of FIG. 1 are set. FIG. 4 is a cross-sectional perspective view (including part of an imaginary part) in a quartz tube disposing portion of a cast product manufactured by the method of the present invention. FIG. 5 is a cross-sectional perspective view showing a state where the quartz tube is removed from the casting shown in FIG. FIG. 6 is a cross-sectional view for explaining the degree of bending (distortion) of an elongated casting hole of a casting.
【0012】図1〜3に示す本発明の一実施例に使用す
る鋳型(砂型)は、上型3と下型4とからなる。下型4
の鋳造用中空部5bには、直径5mm、長さ250mm
の石英管1が鋳物の細長鋳ぬき穴1aを形成する部位に
配設されている。この石英管1の両端部(幅木部)9
は、鋳型側面に埋めて石英管1を鋳型(鋳造用中空部
5)内に固定するため、砂をフェノール樹脂により固化
した同じ太さの棒を石英管1に挿入し接着したものであ
る。これは、解枠(型ばらし)の際に、石英管1の破片
が(鋳型の材料である)型ばらしした砂の中に混入しな
いようにしたものである。上型3と下型4の上面同士を
図2に示すように接合させて鋳型を組み立て、鋳造に使
用した。鋳型の注湯口7から1380〜1420℃の溶
湯(溶融鋳鉄:FC250、FCD450、比重7.
2)を注湯した。溶湯が、注湯口7から注湯部6及び溶
湯路8を経て、石英管1が配設されている鋳造用中空部
5を満たしたとき、注湯を終了した。冷却したのち、鋳
型を解枠(型ばらし)し、注湯口と注湯部の部分を切断
して、石英管1を鋳ぐるんだ鋳物2を得た。この鋳物2
の石英管1に、外径4mmの(コンクリート穴あけ用)
ドリルの刃を当て、破砕し、貫通して、細長鋳ぬき穴1
aを形成した。石英管1の破砕、除去は容易であった。
また、細長鋳ぬき穴1aに沿って鋳物2を切断して穴1
aの歪みの程度を測定したところ、穴の両端を結ぶライ
ンから細長鋳ぬき穴1aの最も離れた部位までの歪み距
離(垂線の長さ)hは0.2mm/穴の長さ250mm
であった(図6参照)。The mold (sand mold) used in the embodiment of the present invention shown in FIGS. 1 to 3 comprises an upper mold 3 and a lower mold 4. Lower mold 4
The casting hollow part 5b has a diameter of 5 mm and a length of 250 mm.
The quartz tube 1 is disposed at a portion forming the elongated casting hole 1a of the casting. Both ends (skirting board) 9 of this quartz tube 1
In order to fix the quartz tube 1 in the mold (hollow portion 5 for casting) by burying it in the side surface of the mold, a rod of the same thickness obtained by solidifying sand with phenol resin is inserted into the quartz tube 1 and bonded. This is to prevent fragments of the quartz tube 1 from mixing into the unmolded sand (which is the material of the mold) during the unraveling (unmolding). The upper surfaces of the upper mold 3 and the lower mold 4 were joined together as shown in FIG. 2 to assemble a mold and used for casting. Molten metal (molten cast iron: FC250, FCD450, specific gravity of 7.380 to 1420 ° C. from the pouring port 7 of the mold).
2) was poured. When the molten metal filled the casting hollow portion 5 in which the quartz tube 1 was arranged, from the pouring port 7 through the pouring portion 6 and the molten metal passage 8, the pouring was finished. After cooling, the mold was unframed (separated from the mold) and the pouring port and the pouring portion were cut to obtain a casting 2 in which the quartz tube 1 was cast. This casting 2
Quartz tube 1 with an outer diameter of 4 mm (for drilling concrete)
Apply the blade of a drill, crush it, and then pierce it to make an elongated casting hole 1
a was formed. It was easy to crush and remove the quartz tube 1.
In addition, the casting 2 is cut along the elongated cast hole 1a to form the hole 1
When the degree of strain of a was measured, the strain distance (perpendicular length) h from the line connecting both ends of the hole to the furthest part of the elongated casting hole 1a was 0.2 mm / hole length 250 mm
Was (see FIG. 6).
【0013】比較のため、前記と同じ鋳型を使用し、石
英管1の代わりに直径5mm、長さ250mmのスチー
ル管を鋳造用中空部5bに配設して、前記方法と同様に
して、スチール管を鋳ぐるんだ鋳物2を製造した。スチ
ール管配設部に沿って鋳物2を切断して、その歪みの程
度を測定したところ、穴の両端を結ぶラインから細長鋳
ぬき穴1aの最も離れた部位までの歪み距離hは5mm
/スチール管の長さ250mmであった。For comparison, using the same mold as described above, instead of the quartz tube 1, a steel tube having a diameter of 5 mm and a length of 250 mm is arranged in the casting hollow portion 5b, and the steel is manufactured in the same manner as the above method. A casting 2 in which a pipe was cast was produced. When the casting 2 was cut along the steel pipe installation portion and the degree of distortion was measured, the distortion distance h from the line connecting both ends of the hole to the farthest part of the elongated casting hole 1a was 5 mm.
/ The length of the steel tube was 250 mm.
【0014】[0014]
【発明の効果】以上説明した通り、本発明により初め
て、曲がりや歪みなどの変形の極めて少ない細長い鋳ぬ
き穴を有する鋳物を簡易かつ経済的に製造する方法を提
供することが可能となった。As described above, according to the present invention, it is possible for the first time to provide a method for easily and economically producing a casting having an elongated cast hole with extremely small deformation such as bending and distortion.
【図1】 本発明の細長鋳ぬき穴を有する鋳物の製造に
使用する上型と下型の平面図である。FIG. 1 is a plan view of an upper die and a lower die used for manufacturing a casting having an elongated casting hole according to the present invention.
【図2】 図1の上型と下型をセットした鋳型の(想像
部分を含む)斜視図である。FIG. 2 is a perspective view (including an imaginary portion) of a mold in which the upper mold and the lower mold of FIG. 1 are set.
【図3】 図1の上型と下型をセットした鋳型のA−A
線における側断面図である。FIG. 3 is an AA of a mold in which the upper mold and the lower mold of FIG. 1 are set.
It is a side sectional view in a line.
【図4】 本発明の方法により製造した鋳物の石英管配
設部における断面斜視図である。FIG. 4 is a cross-sectional perspective view of a quartz tube installation portion of a cast product manufactured by the method of the present invention.
【図5】 図4に示す鋳物から石英管を除去した状態を
示す断面斜視図である。5 is a cross-sectional perspective view showing a state in which a quartz tube is removed from the casting shown in FIG.
【図6】 鋳物の細長鋳ぬき穴の曲がり(歪み)程度に
ついて説明するための断面図である。FIG. 6 is a cross-sectional view for explaining a degree of bending (distortion) of an elongated casting hole of a casting.
1 石英管 1a 細長鋳ぬき穴 2 鋳物 3 上型 4 下型 5 鋳造用中空部 6 注湯部 7 注湯口 8 溶湯路 1 quartz tube 1a Slender cast hole 2 castings 3 Upper mold 4 Lower mold 5 Hollow part for casting 6 Pouring part 7 pouring spout 8 molten metal passage
Claims (3)
た鋳型内に鋳造用金属溶湯を注湯し、冷却し、次いで解
枠した後、前記非金属無機質細管又は棒状中子を除去す
ること、を特徴とする細長鋳ぬき穴を有する鋳物の製造
方法。1. A non-metal inorganic thin tube or rod-shaped core is removed by pouring a molten metal for casting into a mold in which a non-metal inorganic thin tube or rod-shaped core is arranged, cooling and then opening the frame. And a method for producing a casting having an elongated cast hole.
化点300〜1600℃を有するものである、請求項1
に記載の細長鋳ぬき穴を有する鋳物の製造方法。2. The non-metal inorganic thin tube or rod-shaped core has a softening point of 300 to 1600 ° C.
A method of manufacturing a casting having an elongated casting hole according to [4].
英細管中子である、請求項1に記載の細長鋳ぬき穴を有
する鋳物の製造方法。3. The method for producing a casting having an elongated casting hole according to claim 1, wherein the non-metallic inorganic thin tube or rod-shaped core is a quartz thin tube core.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001284561A JP2003088949A (en) | 2001-09-19 | 2001-09-19 | Method for producing casting having slender hole as cast |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001284561A JP2003088949A (en) | 2001-09-19 | 2001-09-19 | Method for producing casting having slender hole as cast |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2003088949A true JP2003088949A (en) | 2003-03-25 |
Family
ID=19107859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001284561A Pending JP2003088949A (en) | 2001-09-19 | 2001-09-19 | Method for producing casting having slender hole as cast |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2003088949A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008100264A (en) * | 2006-10-20 | 2008-05-01 | Tohoku Univ | Method for producing hollow body made of rapidly solidified metal and production device for hollow body made of rapidly solidified metal |
CN101905292A (en) * | 2010-08-18 | 2010-12-08 | 中核苏阀横店机械有限公司 | Casting sand mould box of cylindrical casting |
CN102836965A (en) * | 2012-08-03 | 2012-12-26 | 鞍钢重型机械有限责任公司 | Casting method for guaranteeing wall thickness precision of blast furnace hot-blast stove pillar |
-
2001
- 2001-09-19 JP JP2001284561A patent/JP2003088949A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008100264A (en) * | 2006-10-20 | 2008-05-01 | Tohoku Univ | Method for producing hollow body made of rapidly solidified metal and production device for hollow body made of rapidly solidified metal |
CN101905292A (en) * | 2010-08-18 | 2010-12-08 | 中核苏阀横店机械有限公司 | Casting sand mould box of cylindrical casting |
CN102836965A (en) * | 2012-08-03 | 2012-12-26 | 鞍钢重型机械有限责任公司 | Casting method for guaranteeing wall thickness precision of blast furnace hot-blast stove pillar |
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