JP4203840B2 - Casting sand filling method and apparatus in frameless horizontal split mold making machine - Google Patents

Casting sand filling method and apparatus in frameless horizontal split mold making machine Download PDF

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JP4203840B2
JP4203840B2 JP2001159777A JP2001159777A JP4203840B2 JP 4203840 B2 JP4203840 B2 JP 4203840B2 JP 2001159777 A JP2001159777 A JP 2001159777A JP 2001159777 A JP2001159777 A JP 2001159777A JP 4203840 B2 JP4203840 B2 JP 4203840B2
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Prior art keywords
sand
compressed air
split mold
molding
horizontal split
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JP2002346698A (en
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小宮山貴之
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Sintokogio Ltd
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Sintokogio Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、 無枠式水平割鋳型造型機における鋳物砂充填方法およびその装置に係り、より詳しくは、2個の枠体とマッチプレートと2個のスキーズ板とで画成される垂直状態の2個の造型室に充填された鋳物砂を前記2個のスキーズ板によってスキーズしたのち前記2個の枠体から抜き枠して無枠式水平割鋳型を造型する無枠式水平割鋳型造型機における鋳物砂を収納したサンドタンクから前記2個の造型室に鋳物砂を充填する方法およびその装置に関する。
【0002】
【従来の技術】
従来、無枠式水平割鋳型造型機のひとつとして、特開平6-277800号公報で開示されるように、2個の枠体とマッチプレートと2個のスキーズ板とで画成される垂直状態の2個の造型室に充填された鋳物砂を前記2個のスキーズ板によってスキーズしたのち前記2個の枠体から抜き枠して無枠式水平割鋳型を造型するように構成されたものがある。
【0003】
【発明が解決しようとする課題】
ところで、上記のような無枠式水平割鋳型造型機では、高圧の圧縮空気によって鋳物砂を造型室に吹き込み充填するため、鋳物砂が造型室の砂吹き込み口内あるいは砂吹込みノズル内で固くなってそれらを詰まらせることが多々あり、しかも、鋳物砂と一緒に吹き込まれた高圧の圧縮空気が鋳物砂の充填性を阻害し、さらに、吹き込まれる鋳物砂によってマッチプレートの模型が摩耗されるなるなどの問題があった。
【0004】
本発明は上記の問題を解消するために成されたもので、その目的は、比較的低圧の圧縮空気によって鋳物砂を造型室に吹き込み充填することができる無枠式水平割鋳型造型機における鋳物砂充填方法およびその装置を提供することにある。
【0005】
【課題を解決するための手段】
上記の目的を達成するために請求項1の発明の無枠式水平割鋳型造型機における鋳物砂充填方法は、2個の枠体とマッチプレートと2個のスキーズ板とで画成される垂直状態の2個の造型室に充填された鋳物砂を前記2個のスキーズ板によってスキーズしたのち前記2個の枠体から抜き枠をして無枠式水平割鋳型を造型する無枠式水平割鋳型造型機において、鋳物砂を収納したサンドタンクから前記 2個の造型室に鋳物砂を充填する方法であって、下部が二股状を成した密閉状中空体の内部の下部が、二股状を成しかつ通気性を有する中空体状の仕切り部材で仕切られて二重構造を成し、さらに前記仕切り部材の内側に鋳物砂を収納する砂貯蔵室が、また前記仕切り部材の外側に圧縮空気を導入する空気導入室がそれぞれ形成されたサンドタンクを用い、前記空気導入室に圧力が0.05〜0.18MPaの範囲の圧縮空気を供給して前記砂貯蔵室の鋳物砂を流動化するとともに、0.05〜0.18MPaの範囲にあって前記空気導入室に供給した圧縮空気の圧力よりも高い圧力の圧縮空気を前記砂貯蔵室に供給して鋳物砂を前記サンドタンクの砂噴出孔から噴出させることを特徴とする。
【0006】
【発明の実施の形態】
以下、本発明を適用した無枠式水平割鋳型造型機の一実施例について図1に基づき詳細に説明する。本無枠式水平割鋳型造型機においては、図示しない機台にサンドタンク1が装着してあり、さらに前記機台にはL字状の回動フレーム2が90度上下回動可能にして装着してある。そして、前記サンドタンク1は、下部が二股状を成した密閉状の中空体を成し、かつ下部の内部が二股状を成しかつ通気性を有する中空体状の仕切り部材3で仕切ってあって、前記仕切り部材3の内側は鋳物砂を収納する砂貯蔵室4に、また前記仕切り部材3の外側は圧縮空気を導入する空気導入室5にそれぞれ形成した二重構造にしてある。また、前記砂空気導入室5には、圧力が0.05〜0.18MPaの範囲で、前記砂貯蔵室4の鋳物砂を流動化する圧力を有する圧縮空気を供給する第1圧縮空気源6が複数の第1電磁開閉弁7・7を介して接続してあり、また、前記砂貯蔵室4には、圧力が0.05〜0.18MPaの範囲で、前記第1圧縮空気源6より高い圧力の圧縮空気を供給する第2圧縮空気源8が第2電磁開閉弁9を介して接続してある。
【0007】
また、前記回動フレーム2の左部には下枠体10が垂直状態にして装着してあり、さらに前記回動フレーム2の下部にはこれに沿って延びるガイドバー11が架設してある。また、ガイドバー11には上枠体12と上スキーズ機構13とが垂直状態で摺動自在に装着してあり、前記上枠体12は前記回動フレーム2に固着されたシリンダ(図示せず)の伸縮作動により左右動するようになっている。また、前記上スキーズ機構13は、垂直状態の上スキーズ板14と、上スキーズ板14を支持する支持棒15と、前記ガイドバー11に摺動自在に装着されかつ前記支持棒15を前記ガイドバー11の延びる方向へ摺動自在に貫通させた支持部材16とで構成してあり、前記上スキーズ機構13の支持棒15には後述のスキーズ機構13に係止可能な突起部材17が設けてある。
【0008】
また、前記上・下枠体12・10の下方には前記上スキーズ板14および後述の下スキーズ板22を相互に接近させるスキーズ機構18が別途配設してあり、このスキーズ機構18は、別途固定配設された左右方向へ延びるガイドバー19と、ガイドバー19に摺動自在に装着された移動フレーム20と、移動フレーム20の左部に装着されかつこれに沿って延びる油圧シリンダ21とで構成してあり、油圧シリンダ21の出力ロッドの先端には下スキーズ板22が固着してある。また、前記移動フレーム20の上部には凹みが形成してあって、移動フレーム20の上部右端は、図示する状態では前記上スキーズ機構13の突起部材13に係止できるようになっている。
【0009】
なお、図中23はマッチプレートである。
【0010】
このように構成したものは、図示するように、上・下枠体12・10間にマッチプレート23を搬入したのち、図示しないシリンダを伸長作動して上枠体12を下枠体10に近づけて上・下枠体12・10、マッチプレート23を重合状態にし、重合状態の上・下枠体12・10およびマッチプレート23と、回動フレーム2等を図示しない回転機構をよって90度垂直回転させ、上・下枠体12・10の砂吹き込み口をサンドタンク1の砂吹き出し孔に接続させる。次いで、上枠体12の他端開口部内に上スキーズ板14を、また、下枠体10の他端開口部内に下スキーズ板22をそれぞれ若干挿入して、これら上・下枠体12・10、マッチプレート23および上・下スキーズ板14・22によって2個の造型室を画成す。
【0011】
次いで、サンドタンク1内に所要量の鋳物砂を装入したのち、複数の第1電磁開閉弁7・7を開き、第1圧縮空気源6からの圧縮空気をサンドタンク1の空気導入室5に供給をして砂貯蔵室4の鋳物砂を流動化するとともに、第2電磁開閉弁9を開き、第2圧縮空気源8からの圧縮空気をサンドタンク1の砂貯蔵室4に供給して鋳物砂を前記サンドタンク1の砂噴出孔から噴出させ、2個の造型室にそれぞれ吹き込み充填し、続いて、スキーズ機構18の油圧シリンダ21を伸長作動して上・下スキーズ板14・22を相互に近づけ、造型室内の鋳物砂をスキーズする。
【0012】
こうして、鋳物砂のスキーズ完了後、油圧シリンダ21を収縮作動しかつ図示しないシリンダを作動して上・下スキーズ板14・22を相互に引き離すとともに上・下枠体12・10からそれぞれ抜き出し、続いて、上・下枠体12・10、マッチプレート23、回動フレーム2等を図示しない回転機構をよって90度垂直反転させて上・下枠体12・10、マッチプレート23等を水平状態に戻す。次いで、上枠体12を一旦上昇させて下枠体10から引き離し、続いて、マッチプレート23を下枠体10から分離する。次いで、上・下枠体12・10を再び近づけてこれらを重ね合わせ、続いて、上・下枠体12・10から上下鋳型を抜き出して一サイクルを終了する。
【0013】
【発明の効果】
以上の説明から明らかなように、請求項1の発明は、2個の枠体とマッチプレートと2個のスキーズ板とで画成される垂直状態の2個の造型室に充填された鋳物砂を前記2個のスキーズ板によってスキーズしたのち前記2個の枠体から抜き枠をして無枠式水平割鋳型を造型する無枠式水平割鋳型造型機において、鋳物砂を収納したサンドタンクから前記 2個の造型室に鋳物砂を充填する方法であって、下部が二股状を成した密閉状中空体の内部の下部が、二股状を成しかつ通気性を有する中空体状の仕切り部材で仕切られて二重構造を成し、さらに前記仕切り部材の内側に鋳物砂を収納する砂貯蔵室が、また前記仕切り部材の外側に圧縮空気を導入する空気導入室がそれぞれ形成されたサンドタンクを用い、前記空気導入室に圧力が0.05〜0.18MPaの範囲の圧縮空気を供給して前記砂貯蔵室の鋳物砂を流動化するとともに、0.05〜0.18MPaの範囲にあって前記空気導入室に供給した圧縮空気の圧力よりも高い圧力の圧縮空気を前記砂貯蔵室に供給して鋳物砂を前記サンドタンクの砂噴出孔から噴出させるから、比較的低圧の圧縮空気によって鋳物砂を造型室に吹き込み充填することができるため、この種の造型機における従来の問題点、すなわち、鋳物砂が造型室の砂吹き込み口内あるいは砂吹込みノズル内で固くなってそれらを詰まらせたり、鋳物砂と一緒に吹き込まれた高圧の圧縮空気が鋳物砂の充填性を阻害したり、吹き込まれる鋳物砂によってマッチプレートの模型が摩耗したりするのを解消することが可能になるなどの優れた実用的効果を奏する。
【図面の簡単な説明】
【図1】本発明の一実施例の概略正面図である。
【符号の説明】
1 サンドタンク
3 仕切り部材
4 砂貯蔵室
5 空気導入室
6 第1圧縮空気源
7 第1電磁開閉弁
8 第2圧縮空気源
9 第2電磁開閉弁
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a casting sand filling method and apparatus therefor in a frameless horizontal split mold making machine, and more specifically, in a vertical state defined by two frames, a match plate, and two squeeze plates. An unframed horizontal split mold molding machine that forms the unframed horizontal split mold by squeezing the casting sand filled in the two molding chambers with the two squeeze plates and then removing the frame from the two frames. The present invention relates to a method and an apparatus for filling the two molding chambers from a sand tank containing the foundry sand.
[0002]
[Prior art]
Conventionally, as one of the frameless horizontal split mold making machines, as disclosed in JP-A-6-277800, a vertical state defined by two frames, a match plate, and two squeeze plates The molding sand filled in the two molding chambers is squeezed by the two squeeze plates, and then the two frame bodies are removed to form a frameless horizontal split mold. is there.
[0003]
[Problems to be solved by the invention]
By the way, in the frameless horizontal split mold molding machine as described above, the molding sand is blown and filled into the molding chamber by high-pressure compressed air, so that the molding sand becomes hard in the sand blowing port or the sand blowing nozzle of the molding chamber. The high-pressure compressed air blown together with the foundry sand impairs the filling property of the foundry sand, and the foundry sand blows the match plate model. There were problems such as.
[0004]
The present invention has been made to solve the above problems, and its object is to cast a frameless horizontal split mold molding machine capable of blowing and filling molding sand into a molding chamber with compressed air of relatively low pressure. The object is to provide a sand filling method and apparatus.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the casting sand filling method in the frameless horizontal split mold making machine of the invention of claim 1 is a vertical defined by two frames, a match plate and two squeeze plates. The frameless horizontal splitting is performed by forming the frameless horizontal split mold by squeezing the casting sand filled in the two molding chambers in the state with the two squeezing plates and then removing the frame from the two frame bodies. In a mold making machine, the two molding chambers are filled with foundry sand from a sand tank containing foundry sand, and the lower part of the inside of the sealed hollow body having a bifurcated lower part is bifurcated. A sand storage chamber that is divided by a hollow partition member having air permeability and has a double structure, and that stores casting sand inside the partition member, and compressed air outside the partition member. Sander with air introduction chambers With ink, with the pressure to fluidize the molding sand in the sand storage chamber by supplying compressed air in the range of 0.05~0.18MPa in the air intake chamber, the range of 0.05~0.18MPa Then , compressed air having a pressure higher than the pressure of the compressed air supplied to the air introduction chamber is supplied to the sand storage chamber, and casting sand is ejected from the sand ejection holes of the sand tank.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a frameless horizontal split mold making machine to which the present invention is applied will be described in detail with reference to FIG. In this frameless horizontal split mold making machine, a sand tank 1 is mounted on a machine base (not shown), and an L-shaped rotary frame 2 is mounted on the machine base so that it can be turned up and down by 90 degrees. It is. The sand tank 1 is partitioned by a hollow-shaped partition member 3 having a closed hollow body with a lower portion formed in a bifurcated shape, and an inner portion of the lower portion formed in a bifurcated shape and having air permeability. The partition member 3 has a double structure formed inside a sand storage chamber 4 for storing foundry sand, and the outside of the partition member 3 is formed in an air introduction chamber 5 for introducing compressed air. The sand air introduction chamber 5 has a plurality of first compressed air sources 6 for supplying compressed air having a pressure for fluidizing the foundry sand in the sand storage chamber 4 within a pressure range of 0.05 to 0.18 MPa. The sand storage chamber 4 is connected with compressed air having a pressure higher than that of the first compressed air source 6 within a pressure range of 0.05 to 0.18 MPa. A second compressed air source 8 to be supplied is connected via a second electromagnetic on-off valve 9.
[0007]
Further, a lower frame body 10 is mounted in a vertical state on the left portion of the rotating frame 2, and a guide bar 11 extending along the lower frame body 10 is installed at the lower portion of the rotating frame 2. Further, an upper frame body 12 and an upper squeeze mechanism 13 are slidably mounted on the guide bar 11 in a vertical state, and the upper frame body 12 is a cylinder (not shown) fixed to the rotating frame 2. ) To move left and right. The upper skies mechanism 13 includes a vertical upper skies plate 14, a support bar 15 that supports the upper skies board 14, and is slidably mounted on the guide bar 11, and the support bar 15 is attached to the guide bar 15. 11 and a support member 16 that is slidably penetrated in the extending direction, and a support member 15 of the upper squeeze mechanism 13 is provided with a protrusion member 17 that can be locked to the squeeze mechanism 13 described later. .
[0008]
In addition, a squeeze mechanism 18 for separately bringing the upper squeeze plate 14 and a lower squeeze plate 22 described later closer to each other is provided below the upper and lower frame bodies 12 and 10. A fixedly arranged guide bar 19 extending in the left-right direction, a moving frame 20 slidably attached to the guide bar 19, and a hydraulic cylinder 21 attached to the left portion of the moving frame 20 and extending along the same. The lower squeeze plate 22 is fixed to the tip of the output rod of the hydraulic cylinder 21. Further, a recess is formed in the upper part of the moving frame 20, and the upper right end of the moving frame 20 can be locked to the protruding member 13 of the upper squeeze mechanism 13 in the state shown in the drawing.
[0009]
In the figure, reference numeral 23 denotes a match plate.
[0010]
As shown in the figure, after the match plate 23 is loaded between the upper and lower frame bodies 12 and 10, the cylinder configured not shown is extended to bring the upper frame body 12 closer to the lower frame body 10. The upper and lower frames 12 and 10 and the match plate 23 are placed in a superposed state, and the upper and lower frames 12 and 10 and the match plate 23 in the superposed state and the rotating frame 2 and the like are rotated 90 degrees vertically by a rotation mechanism (not shown) Rotate and connect the sand blowing ports of the upper and lower frame bodies 12 and 10 to the sand blowing holes of the sand tank 1. Next, the upper squeeze plate 14 and the lower squeeze plate 22 are slightly inserted into the other frame opening of the upper frame body 12 and the other frame opening of the lower frame body 10, respectively. The match plate 23 and the upper and lower squeeze plates 14 and 22 define two molding chambers.
[0011]
Next, after inserting a required amount of foundry sand into the sand tank 1, the plurality of first electromagnetic on-off valves 7, 7 are opened, and the compressed air from the first compressed air source 6 is supplied to the air introduction chamber 5 of the sand tank 1. And the casting sand in the sand storage chamber 4 is fluidized, the second electromagnetic on-off valve 9 is opened, and the compressed air from the second compressed air source 8 is supplied to the sand storage chamber 4 of the sand tank 1. Cast sand is ejected from the sand ejection holes of the sand tank 1 and blown and filled into the two molding chambers. Subsequently, the hydraulic cylinder 21 of the squeeze mechanism 18 is extended to operate the upper and lower squeeze plates 14 and 22. Close to each other and squeeze the foundry sand in the molding room.
[0012]
Thus, after the squeezing of the foundry sand is completed, the hydraulic cylinder 21 is contracted and the cylinder (not shown) is operated to separate the upper and lower squeeze plates 14 and 22 from each other and to extract them from the upper and lower frame bodies 12 and 10, respectively. Then, the upper and lower frame bodies 12 and 10, the match plate 23, the rotation frame 2, etc. are vertically inverted 90 degrees by a rotation mechanism (not shown) so that the upper and lower frame bodies 12 and 10, the match plate 23, etc. are in a horizontal state. return. Next, the upper frame 12 is once raised and pulled away from the lower frame 10, and then the match plate 23 is separated from the lower frame 10. Next, the upper and lower frame bodies 12 and 10 are brought close again to superimpose them, and then the upper and lower molds are extracted from the upper and lower frame bodies 12 and 10 to complete one cycle.
[0013]
【The invention's effect】
As can be seen from the above description, the invention of claim 1 is foundry sand filled in two molding chambers in a vertical state defined by two frames, a match plate and two squeeze plates. In a frameless horizontal split mold making machine that forms a frameless horizontal split mold by squeezing with the two squeeze plates and then removing a frame from the two frames, from a sand tank containing casting sand A method of filling molding sand into the two molding chambers, wherein the lower part inside the sealed hollow body having a bifurcated lower part is a bifurcated hollow body-shaped partition member having air permeability A sand tank in which a sand storage chamber for storing casting sand is formed inside the partition member, and an air introduction chamber for introducing compressed air is formed outside the partition member. The pressure in the air introduction chamber is 0.05 Compressed air in the range of ~ 0.18 MPa to fluidize the foundry sand in the sand storage chamber, and from the pressure of compressed air in the range of 0.05 to 0.18 MPa supplied to the air introduction chamber Since high-pressure compressed air is supplied to the sand storage chamber and the molding sand is ejected from the sand ejection holes of the sand tank, the molding sand can be blown and filled into the molding chamber with relatively low-pressure compressed air. The conventional problem with this type of molding machine , that is, the molding sand becomes hard in the sand blowing port or the sand blowing nozzle of the molding chamber and clogs them, or the high pressure compression blown together with the molding sand. It has excellent practical effects such as that air can obstruct the filling property of the foundry sand and can eliminate the wear of the model of the match plate due to the foundry sand being blown .
[Brief description of the drawings]
FIG. 1 is a schematic front view of an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sand tank 3 Partition member 4 Sand storage chamber 5 Air introduction chamber 6 1st compressed air source 7 1st electromagnetic on-off valve 8 2nd compressed air source 9 2nd electromagnetic on-off valve

Claims (2)

2個の枠体とマッチプレートと2個のスキーズ板とで画成される垂直状態の2個の造型室に充填された鋳物砂を前記2個のスキーズ板によってスキーズしたのち前記2個の枠体から抜き枠をして無枠式水平割鋳型を造型する無枠式水平割鋳型造型機において、鋳物砂を収納したサンドタンクから前記 2個の造型室に鋳物砂を充填する方法であって、
下部が二股状を成した密閉状中空体の内部の下部が、二股状を成しかつ通気性を有する中空体状の仕切り部材で仕切られて二重構造を成し、さらに前記仕切り部材の内側に鋳物砂を収納する砂貯蔵室が、また前記仕切り部材の外側に圧縮空気を導入する空気導入室がそれぞれ形成されたサンドタンクを用い、
前記空気導入室に圧力が0.05〜0.18MPaの範囲の圧縮空気を供給して前記砂貯蔵室の鋳物砂を流動化するとともに、0.05〜0.18MPaの範囲にあって前記空気導入室に供給した圧縮空気の圧力よりも高い圧力の圧縮空気を前記砂貯蔵室に供給して鋳物砂を前記サンドタンクの砂噴出孔から噴出させることを特徴とする無枠式水平割鋳型造型機における鋳物砂充填方法。
The two frames after squeezing the casting sand filled in the two molding chambers in the vertical state defined by the two frames, the match plate, and the two squeeze plates with the two squeeze plates. In a frameless horizontal split mold molding machine that forms a frameless horizontal split mold by punching a frame from a body, a method of filling the two molding chambers from a sand tank containing the cast sand, ,
The lower part of the inside of the sealed hollow body having a bifurcated lower part is partitioned by a bifurcated and air-permeable hollow body-shaped partition member to form a double structure, and the inner side of the partition member A sand storage chamber for storing the foundry sand, and a sand tank in which an air introduction chamber for introducing compressed air is formed outside the partition member,
While fluidizing the molding sand of the sand storage chamber pressure to the air introducing chamber by supplying compressed air in the range of 0.05~0.18MPa, the in the range of 0.05~0.18MPa air A frameless horizontal split mold molding, characterized in that compressed air having a pressure higher than the pressure of the compressed air supplied to the introduction chamber is supplied to the sand storage chamber and casting sand is ejected from the sand ejection holes of the sand tank. Casting sand filling method in the machine.
2個の枠体とマッチプレートと2個のスキーズ板とで画成される垂直状態の2個の造型室に充填された鋳物砂を前記2個のスキーズ板によってスキーズしたのち前記After squeezing the foundry sand filled in the two molding chambers in the vertical state defined by the two frames, the match plate, and the two squeeze plates with the two squeeze plates,
2個の枠体から抜き枠をして無枠式水平割鋳型を造型する無枠式水平割鋳型造型機において、鋳物砂を収納したサンドタンクから前記2個の造型室に鋳物砂を充填する装置であって、In an unframed horizontal split mold molding machine that forms a frameless horizontal split mold by punching frames from two frames, the two molding chambers are filled with sand from a sand tank containing the foundry sand. A device,
前記サンドタンクは、下部が二股状を成した密閉状中空体の内部の下部が、二股状を成しかつ通気性を有する中空体状の仕切り部材で仕切られて二重構造を成し、さらに前記仕切り部材の内側に鋳物砂を収納する砂貯蔵室が、また前記仕切り部材の外側に圧縮空気を導入する空気導入室がそれぞれ形成され、The sand tank has a double structure in which a lower portion of a sealed hollow body having a bifurcated lower portion is partitioned by a hollow body-shaped partition member having a bifurcated shape and air permeability. A sand storage chamber for storing foundry sand inside the partition member, and an air introduction chamber for introducing compressed air to the outside of the partition member, respectively.
前記空気導入室には圧力が0.05〜0.18MPaでかつ前記砂貯蔵室の鋳物砂を流動化する圧縮空気を供給する第1圧縮空気源が接続され、A pressure source of 0.05 to 0.18 MPa is connected to the air introduction chamber, and a first compressed air source for supplying compressed air for fluidizing the foundry sand in the sand storage chamber is connected,
前記砂貯蔵室には0.05〜0.18MPaの範囲にあって前記第1圧縮空気源の圧縮空気の圧力より高い圧力の圧縮空気を供給する第2圧縮空気源が接続されたことを特徴とする無枠式水平割鋳型造型機における鋳物砂充填装置。The sand storage chamber is connected to a second compressed air source for supplying compressed air having a pressure in the range of 0.05 to 0.18 MPa and higher than the pressure of the compressed air of the first compressed air source. Casting sand filling equipment in a frameless horizontal split mold making machine.
JP2001159777A 2001-05-29 2001-05-29 Casting sand filling method and apparatus in frameless horizontal split mold making machine Expired - Fee Related JP4203840B2 (en)

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