JP4352395B2 - Method and apparatus for compressing foundry sand - Google Patents
Method and apparatus for compressing foundry sand Download PDFInfo
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- JP4352395B2 JP4352395B2 JP2004032787A JP2004032787A JP4352395B2 JP 4352395 B2 JP4352395 B2 JP 4352395B2 JP 2004032787 A JP2004032787 A JP 2004032787A JP 2004032787 A JP2004032787 A JP 2004032787A JP 4352395 B2 JP4352395 B2 JP 4352395B2
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- 239000004576 sand Substances 0.000 title claims description 43
- 238000000034 method Methods 0.000 title claims description 15
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 239000003110 molding sand Substances 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims 1
- 239000010720 hydraulic oil Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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Description
本発明は鋳物砂の圧縮方法およびその装置の改良に係り、より詳しくは、鋳枠内の鋳物砂における模型板との接触側をより硬度高く圧縮するのに好適な鋳物砂の圧縮方法およびその装置の改良に関する。 More particularly, the present invention relates to a method for compressing foundry sand, and more particularly to a method for compressing foundry sand suitable for compressing a contact side of a foundry sand in a casting frame with a model plate with higher hardness. It relates to the improvement of the apparatus.
従来、模型板上の鋳枠内に投入された鋳物砂を圧縮して鋳型を造型するに当たり、その鋳物砂を効率良く圧縮して鋳型のキャビティ面が所望の硬度を有するようにすべく、様々な鋳物砂の圧縮方法が行われてきている
。そして、鋳型キャビティ面が所望の硬度を有すべく鋳物砂を効率良く圧縮する方法としては、鋳枠内に投入された鋳物砂をこれの上方から多数の短尺角棒状の押圧部材によって押圧するようにしたものが一般的ある。
Conventionally, in molding a mold by compressing foundry sand put into a casting frame on a model plate, various methods are used to efficiently compress the foundry sand so that the cavity surface of the mold has a desired hardness. Various methods of compacting foundry sand have been used. As a method for efficiently compressing the foundry sand so that the mold cavity surface has a desired hardness, the foundry sand introduced into the casting frame is pressed from above by a large number of short-sized bar-shaped pressing members. There is a common one.
しかし、このような従来の鋳物砂の圧縮方法では、鋳物砂の流動性が悪いこともあって、鋳物砂を隅々にまで十分に圧縮することができず、これに伴って、鋳型キャビティ面を所望の硬度にするためには大きな力で鋳物砂を圧縮する必要があり、しかも、このように大きな力で鋳物砂を圧縮しても、特に模型板の模型が複雑な形状を成す場合には、キャビティ面が所望の硬度を有する鋳型を得るのが難しかった。
However, in such a conventional method for compressing foundry sand, the fluidity of the foundry sand may be poor, and the foundry sand cannot be sufficiently compressed to every corner. In order to achieve a desired hardness, it is necessary to compress the foundry sand with a large force, and even when the foundry sand is compressed with such a large force, especially when the model of the model plate has a complicated shape. However, it was difficult to obtain a mold having a desired cavity surface hardness.
解決しようとする問題点は、模型板の模型が複雑な形状を成す場合には、キャビティ面が所望の硬度を有する鋳型を得るのが難しい点である。 The problem to be solved is that when the model of the model plate has a complicated shape, it is difficult to obtain a mold whose cavity surface has a desired hardness.
上記の課題を解消するために本発明における鋳物砂の圧縮方法は、水平状態に配置されかつ上面に適宜の数に分割されるとともに少なくとも一部が昇降可能な分割型の模型を装着した模型板と、この模型板に上下摺動自在に環装されかつ昇降可能に設けられた枠状のレベリングフレームと、このレベリングフレームの上方に昇降可能に配設されかつレベリングフレームとほぼ同じ内寸を有する枠部材と、この枠部材の上方に昇降可能に配設されかつ枠部材とほぼ同じ内寸を有する盛枠と、によって画成された鋳型造型空間に投入された鋳物砂を圧縮して鋳物砂における前記模型板との接触側の硬度をより高くする方法であって、前記レベリングフレーム、前記枠部材および前記盛枠を重畳状態にして所要距離上昇させるとともに下降不可能にした状態の下に前記鋳型造型空間内の鋳物砂をこれの上方から圧縮手段によって圧縮する第１工程と、重畳状態の前記レベリングフレーム、前記枠部材および前記盛枠を下降可能にした状態の下に前記鋳型造型空間内の鋳物砂をこれの上方から前記圧縮手段によって圧縮する第２工程と、重畳状態の前記レベリングフレーム、前記枠部材および前記盛枠を下降可能または下降不可能にした状態の下に前記模型の少なくとも一部を上昇させて前記鋳型造型空間内の鋳物砂をこれの下方から圧縮する第３工程と、を含むことを特徴とする。 In order to solve the above problems, the method for compressing foundry sand according to the present invention is a model plate in which a split type model that is arranged in a horizontal state and divided into an appropriate number on the upper surface and at least part of which can be raised and lowered is mounted. And a frame-like leveling frame that is mounted on the model plate so as to be slidable up and down, and that can be moved up and down, and that is disposed above the leveling frame and that can be moved up and down and has almost the same internal dimensions as the leveling frame. The foundry sand is compressed by compressing the foundry sand placed in the mold molding space defined by the frame member and a fill frame that is disposed above and below the frame member and has substantially the same internal dimensions as the frame member. In which the hardness on the contact side with the model plate is increased, and the leveling frame, the frame member, and the fill frame are overlapped to raise the required distance and not to be lowered. A first step of compressing the foundry sand in the mold making space from above with a compressing means, and a state in which the leveling frame, the frame member and the filling frame in a superposed state can be lowered. A second step of compressing the foundry sand in the mold making space from above by the compressing means, and the leveling frame, the frame member and the filling frame in a superposed state in a state in which the leveling frame, the frame member and the filling frame can be lowered or cannot be lowered. And a third step of raising at least a part of the model below and compressing the foundry sand in the mold making space from below.
本発明は、水平状態に配置されかつ上面に適宜の数に分割されるとともに少なくとも一部が昇降可能な分割型の模型を装着した模型板と、この模型板に上下摺動自在に環装されかつ昇降可能に設けられた枠状のレベリングフレームと、このレベリングフレームの上方に昇降可能に配設されかつレベリングフレームとほぼ同じ内寸を有する枠部材と、この枠部材の上方に昇降可能に配設されかつ枠部材とほぼ同じ内寸を有する盛枠と、によって画成された鋳型造型空間に投入された鋳物砂を圧縮して鋳物砂における模型板との接触側の硬度をより高くする方法であって、前記レベリングフレーム、前記枠部材および前記盛枠を重畳状態にして所要距離上昇させるとともに下降不可能にした状態の下に前記鋳型造型空間内の鋳物砂をこれの上方から圧縮手段によって圧縮する第１工程と、重畳状態の前記レベリングフレーム、前記枠部材および前記盛枠を下降可能にした状態の下に前記鋳型造型空間内の鋳物砂をこれの上方から前記圧縮手段によって圧縮する第２工程と、重畳状態の前記レベリングフレーム、前記枠部材および前記盛枠を下降可能または下降不可能にした状態の下に前記模型の少なくとも一部を上昇させて前記鋳型造型空間内の鋳物砂をこれの下方から圧縮する第３工程と、を含むから、特に模型板の模型が複雑な形状を成す場合でも、キャビティ面が所望の硬度を有する鋳型を適確に造型することが可能になるなるなどの優れた実用的効果を奏する。 The present invention includes a model plate that is arranged in a horizontal state and is divided into an appropriate number on the upper surface, and at least a part of which can be raised and lowered, and a model plate mounted on the model plate so as to be slidable up and down. A frame-like leveling frame provided so as to be able to be raised and lowered, a frame member disposed so as to be able to be raised and lowered above the leveling frame and having substantially the same internal dimensions as the leveling frame, and arranged so as to be able to be raised and lowered above the frame member. A method of increasing the hardness of the contact side of the foundry sand with the model plate by compressing the foundry sand introduced into the mold forming space defined by the fill frame having the same inner dimensions as the frame member. The leveling frame, the frame member and the filling frame are overlapped to raise the required distance and make it impossible to lower the casting sand in the mold making space above it. The first step of compressing by the compression means, and the molding sand in the mold making space from above the leveling frame, the frame member and the filling frame in a state where they can be lowered by the compression means by the compression means. A second step of compressing, and raising the at least part of the model in a state in which the leveling frame, the frame member, and the filling frame in a superposed state can be lowered or cannot be lowered; Since it includes a third step of compressing the foundry sand from below, it is possible to accurately mold a mold whose cavity surface has a desired hardness even when the model of the model plate has a complicated shape. Excellent practical effects such as becoming.
以下、本発明を適用した鋳物砂の圧縮装置の最良の形態について図面に基づき詳細に説明する。本鋳物砂の圧縮装置は、水平状態に配置されかつ適宜の数に分割されるとともに少なくとも一部が昇降可能な分割型の模型１・１を上面に装着した模型板２と、この模型板２に上下摺動自在に環装されかつ昇降可能に設けられた枠状のレベリングフレーム３と、
このレベリングフレーム３の上方に昇降可能に配設されかつレベリングフレーム３とほぼ同じ内寸を有する枠部材４と、この枠部材４の上方に昇降可能に配設されかつ枠部材４とほぼ同じ内寸を有する盛枠５と、この盛枠５の上方に配設されて重畳状態にして所要距離上昇された前記レベリングフレーム３、前記枠部材４および前記盛枠５内の鋳物砂をこれの上方から圧縮する鋳物砂圧縮手段（図示せず）と、で構成してある。
Hereinafter, the best mode of a molding sand compression apparatus to which the present invention is applied will be described in detail with reference to the drawings. The molding sand compression apparatus is arranged in a horizontal state and divided into an appropriate number, and at least a part of which can be moved up and down, a model plate 2 on which an upper surface is mounted, and the model plate 2 A frame-like leveling frame 3 that is mounted so as to be slidable in the vertical direction and is movable up and down;
A frame member 4 disposed above the leveling frame 3 so as to be movable up and down and having substantially the same internal dimensions as the leveling frame 3, and disposed within the frame member 4 so as to be movable up and down and substantially the same as the frame member 4. And the leveling frame 3, the frame member 4 and the casting sand in the filling frame 5 which are arranged above the filling frame 5 and placed in a superimposed state and raised in a necessary distance. Casting sand compression means (not shown) for compressing from
そして、前記模型板２はキャリア６に取り付けてあり、模型板２の前記模型１・１は前記キャリア６に装着した押上げ機構７の伸長作動によって上昇しかつ押上げ機構７の収縮作動により自重で下降するようになっている。また、前記模型１・１は下降した時には上面が前記模型板２のそれと一致しかつ上昇して所望の模型面を形成するようになっいてる。また、前記押上げ機構７は上向きのシリンダ８・８と、これらのシリンダ８・８のピストンロッドと前記模型１・１を連接する連結部材９とで構成してあって、前記模型１・１は前記のシリンダ８・８の伸長作動によって上昇するようになっている。 The model plate 2 is attached to the carrier 6, and the models 1 and 1 of the model plate 2 are raised by the extension operation of the push-up mechanism 7 attached to the carrier 6 and are self-weighted by the contraction operation of the push-up mechanism 7. It comes to descend at. When the models 1 and 1 are lowered, the upper surface thereof coincides with that of the model plate 2 and rises to form a desired model surface. The push-up mechanism 7 is composed of upward cylinders 8 and 8, and piston rods of these cylinders 8 and a connecting member 9 connecting the models 1 and 1, and the models 1 and 1 are connected to each other. Is raised by the extension operation of the cylinders 8.
また、前記レベリングフレーム３は、前記キャリア６の左右両側面に装着した上向きのシリンダ１０・１０の伸長作動によって上昇し、かつシリンダ１０・１０の伸長作動によ前記枠部材４および前記盛枠５をも重畳状態にして所要距離上昇させるようになっている。
また、前記鋳物砂圧縮手段は、多数の短尺角棒状の押圧部材と、これらをそれぞれ昇降させる多数の下向きの油圧シリンダと、多数の油圧シリンダを作動させる油圧ユニットと、で構成してある。
Further, the leveling frame 3 is raised by the extension operation of the upward cylinders 10 and 10 mounted on the left and right side surfaces of the carrier 6, and the frame member 4 and the filling frame 5 by the extension operation of the cylinders 10 and 10. Is also superimposed so that the required distance is raised.
The foundry sand compression means is composed of a large number of short square bar-shaped pressing members, a large number of downward hydraulic cylinders that respectively raise and lower these members, and a hydraulic unit that activates the large number of hydraulic cylinders.
このように構成したものは、図示する状態からシリンダ１０・１０を伸長作動してレベリングフレーム３、枠部材４および盛枠５を重畳状態にして所要距離上昇させるとともに、シリンダ１０・１０への圧力流体の流れを遮断してこれらを下降不可能な状態にして鋳型造型空間を画成した後、この鋳型造型空間内に鋳物砂を投入する。次いで、この鋳型造型空間内の鋳物砂をこれの上方から圧縮手段によって圧縮しかつ圧縮手段の油圧シリンダの作動油の圧力を測定する。 In this configuration, the cylinders 10 and 10 are extended from the illustrated state to raise the required distance by overlapping the leveling frame 3, the frame member 4 and the fill frame 5, and the pressure applied to the cylinders 10 and 10. After the flow of the fluid is blocked and these cannot be lowered, a mold making space is defined, and then molding sand is put into the mold making space. Next, the foundry sand in the mold making space is compressed from above by the compression means, and the pressure of the hydraulic oil in the hydraulic cylinder of the compression means is measured.
これらの油圧シリンダの作動油の圧力が設定したものになった時、シリンダ１０・１０をフリーの状態にして重畳状態のレベリングフレーム３、枠部材４および盛枠５を下降可能にした状態の下に、鋳型造型空間内の鋳物砂をこれの上方から圧縮手段によって圧縮しかつ圧縮手段の油圧シリンダの作動油の圧力を測定する。油圧シリンダの作動油の圧力が設定したものになった時、重畳状態のレベリングフレーム３、枠部材４および盛枠５をそのまま下降可能、または、シリンダ１０・１０への圧力流体の流れを再び遮断して重畳状態のレベリングフレーム３、枠部材４および盛枠５を再び下降不可能にした状態の下に、シリンダ８・８を伸長作動して模型１・１を上昇させて鋳型造型空間内の鋳物砂をこれの下方から圧縮する。これにより、鋳物砂を所望の状態に圧縮することができる。 When the hydraulic oil pressure of these hydraulic cylinders is set, the cylinders 10 and 10 are set in a free state, and the leveling frame 3, the frame member 4 and the filling frame 5 in a superimposed state can be lowered. Then, the foundry sand in the mold making space is compressed from above by the compression means and the pressure of the hydraulic oil in the hydraulic cylinder of the compression means is measured. When the hydraulic oil pressure in the hydraulic cylinder reaches the set value, the superimposed leveling frame 3, frame member 4 and fill frame 5 can be lowered as they are, or the flow of pressure fluid to the cylinders 10 and 10 is shut off again. Then, under the state in which the leveling frame 3, the frame member 4 and the filling frame 5 in the superposed state cannot be lowered again, the cylinders 8 and 8 are extended and the models 1 and 1 are raised so that the inside of the mold making space is The foundry sand is compressed from below. Thereby, the foundry sand can be compressed into a desired state.
なお、上述の最良の形態では、鋳物砂の圧縮時におけるシリンダ１０・１０の作動の変更を、圧縮手段における油圧シリンダの作動油の圧力を測定することによって行っているが、これに限定されるものではなく、例えば、圧縮手段の油圧シリンダを電動シリンダに変えて、鋳物砂の圧縮時における短尺角棒状の押圧部材の下降距離を測定することにより行うようにしても同様の作用効果が得られる。 In the above-described best mode, the operation of the cylinders 10 and 10 is changed by measuring the pressure of the hydraulic oil in the hydraulic cylinder in the compression means when the molding sand is compressed. However, the present invention is not limited to this. For example, by changing the hydraulic cylinder of the compression means to an electric cylinder and measuring the descending distance of the short rectangular bar-shaped pressing member at the time of molding sand compression, the same effect can be obtained. .
１ 模型
２ 模型板
３ レベリングフレーム
４ 枠部材
５ 盛枠
DESCRIPTION OF SYMBOLS 1 Model 2 Model board 3 Leveling frame 4 Frame member 5 Prime frame
Claims (5)
前記レベリングフレーム、前記枠部材および前記盛枠を重畳状態にして所要距離上昇させるとともに下降不可能にした状態の下に前記鋳型造型空間内の鋳物砂をこれの上方から圧縮手段によって圧縮する第１工程と、
重畳状態の前記レベリングフレーム、前記枠部材および前記盛枠を下降可能にした状態の下に前記鋳型造型空間内の鋳物砂をこれの上方から前記圧縮手段によって圧縮する第２工程と、
重畳状態の前記レベリングフレーム、前記枠部材および前記盛枠を下降可能または下降不可能にした状態の下に前記模型の少なくとも一部を上昇させて前記鋳型造型空間内の鋳物砂をこれの下方から圧縮する第３工程と、
を含むことを特徴とする鋳物砂の圧縮方法。 A model plate mounted in a horizontal state and divided into an appropriate number on the upper surface, and at least a part of which can be raised and lowered, and a model plate mounted on the model plate so as to be slidable up and down and can be raised and lowered A frame-like leveling frame provided; a frame member disposed above the leveling frame so as to be movable up and down and having substantially the same inner dimensions as the leveling frame; and a frame member disposed above the frame member so as to be movable up and down A molding frame having substantially the same internal dimensions as a member, and a method of compressing the foundry sand put into the mold forming space defined by the molding sand to increase the hardness on the contact side with the model plate in the foundry sand. ,
The leveling frame, the frame member, and the filling frame are overlapped to raise the required distance and make the casting molding space in the mold molding space compressed by compression means from above under a state in which it cannot be lowered. Process,
A second step of compressing the molding sand in the mold making space from above the compression molding means under the state in which the leveling frame, the frame member and the filling frame in a superposed state can be lowered; and
Under the state where the leveling frame, the frame member, and the filling frame in a superposed state are lowered or impossible to be lowered, at least a part of the model is raised, and the foundry sand in the mold making space is lowered from below. A third step of compressing;
A method for compressing foundry sand, comprising:
The change from the first step to the second step and the change from the second step to the third step are performed when the foundry sand in the mold making space is compressed to a preset size , respectively. The method for compressing foundry sand according to claim 1.
水平状態に配置されかつ上面に適宜の数に分割されるとともに少なくとも一部が昇降可能な分割型の模型を装着した模型板と、
この模型板に上下摺動自在に環装されかつ昇降可能に設けられた枠状のレベリングフレームと、
このレベリングフレームの上方に昇降可能に配設されかつレベリングフレームとほぼ同じ内寸を有する枠部材と、
この枠部材の上方に昇降可能に配設されかつ枠部材とほぼ同じ内寸を有する盛枠と、
この盛枠の上方に配設され重畳状態にして所要距離上昇された前記レベリングフレーム、前記枠部材および前記盛枠によって画成された鋳型造型空間内の鋳物砂をこれの上方から圧縮する鋳物砂圧縮手段と、
を具備したことを特徴とする鋳物砂の圧縮装置。 A device that compresses the contact side of the foundry sand in the casting frame with the model plate with higher hardness,
A model plate that is arranged in a horizontal state and is divided into an appropriate number on the upper surface and at least a part of which can be raised and lowered is mounted with a model plate;
A frame-like leveling frame that is mounted on the model plate so as to be slidable up and down and can be moved up and down;
A frame member disposed so as to be movable up and down above the leveling frame and having substantially the same internal dimensions as the leveling frame;
A fill frame that is arranged to be movable up and down above the frame member and has substantially the same internal dimensions as the frame member;
Foundry sand for compressing the foundry sand in the mold molding space defined by the leveling frame, the frame member and the fill frame, which is disposed above the fill frame and raised in a superimposed state, from above. Compression means;
A molding sand compression apparatus comprising:
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