JP2000158094A - Simultaneously spreading type molding apparatus for both upper and lower molds - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simultaneously spreading type molding apparatus for both upper and lower molds, with which stagnation of flow of molding sand due to the stalling is prevented by reducing the change of the flow of molding sand and the molding sand can suitably and stably be filled to the upper and the lower molds. SOLUTION: This simultaneously spreading type molding apparatus for both upper and lower molds is the one, in which the cross sectional areas of sand vessels 2, 3 for the upper and the lower molds and the cross sectional areas of each sand flowing path 23, 24, 25, 26 of a communicating cylinder 11, auxiliary magazine 12, upper and lower bending cylinders 10, 13 and upper and lower blow heads 14, 15, are almost the same and also, the bending part of each sand flowing path 25, 26 is formed as the streamlined curving shape.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、マッチプレートを
使用して上下鋳型を同時に吹込み造型する吹込式鋳型造
型装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow molding apparatus for simultaneously molding upper and lower molds using a match plate.

【０００２】[0002]

【従来の技術】従来、上記のような上下鋳型同時吹込式
鋳型造型装置としては、実公平２−１４８３３号公報、
特開平５−３３７６０５号公報及び特開平１０−２１６
９０２号公報等で公知になっている。これら上下鋳型同
時吹込式鋳型造型装置は、上、下サンドマガジン、上、
下屈曲筒及び上、下ブローヘッドを通じて上、下鋳枠に
鋳物砂を同時に吹込み造型するようにされている。2. Description of the Related Art Conventionally, as an apparatus for simultaneous injection molding of upper and lower molds as described above, Japanese Utility Model Publication No. 2-14833,
JP-A-5-337605 and JP-A-10-216
This is known in, for example, Japanese Patent Publication No. These upper and lower mold simultaneous blowing type mold making devices are upper, lower sand magazine, upper,
The molding sand is simultaneously blown into the upper and lower flasks through the lower bending cylinder and the upper and lower blow heads.

【０００３】[0003]

【発明が解決しようとする課題】上記のような上下鋳型
同時吹込式鋳型造型装置においては、鋳物砂が上サンド
マガジンから上、下鋳枠に吹込み充填されるまでに流動
速度が変化して失速したり、流れが悪くなって鋳物砂の
一部が屈曲筒及びブローヘッドの屈曲部あるいは水平部
に停滞されてしまい上、下鋳枠に対して適確に砂充填す
ることができなくなる等の問題があり、前記特開平５−
３３７６０５号公報及び特開平１０−２１６９０２号公
報のように補助エヤーの供給により鋳物砂の流動化状態
を維持させるようにして対応している。しかしこれらの
対策でも鋳物砂を上、下鋳枠に対し適確に安定して充填
させることが難しいという問題があった。本発明は、上
記の問題に鑑みて成されたものであって、鋳物砂の流れ
の変化を少なくして失速して停滞するのを防止し、上下
鋳枠に対し鋳物砂を適確に安定して充填できる上下鋳型
同時吹込式鋳型造型装置を提供することを目的とする。In the above-described upper and lower mold simultaneous blowing type mold making apparatus, the flow velocity changes until the molding sand is blown and filled from the upper sand magazine into the upper and lower casting frames. Stall or poor flow, part of the casting sand is stagnated in the bent or horizontal part of the bent cylinder and blow head, and it is not possible to properly fill the lower casting flask with sand. There is a problem of
As described in Japanese Patent Application Laid-Open No. 337605 and Japanese Patent Application Laid-Open No. 10-216902, the fluidization state of the molding sand is maintained by supplying an auxiliary air. However, even with these measures, there is a problem that it is difficult to fill the upper and lower flasks with the casting sand accurately and stably. The present invention has been made in view of the above problems, and reduces a change in the flow of foundry sand to prevent stalling due to stall, thereby properly stabilizing foundry sand against upper and lower flasks. It is an object of the present invention to provide an upper and lower mold simultaneous blowing type mold forming apparatus which can be filled by filling.

【０００４】[0004]

【課題を解決するための手段】上記の目的を達成するた
めに本発明における上下鋳型同時吹込式鋳型造型装置
は、マガジン内を下端から上端近くまで延びる仕切板に
より左右２室に区切り、一方を上型用砂槽、他方を下型
用砂槽に構成したサンドマガジンを配設し、該下型用砂
槽の下端に連通筒及び補助マガジンを介してＪ字状の下
屈曲筒を連通すると共に前記上型用砂槽の下端にＪ字状
の上屈曲筒を連通して設け、前記上、下屈曲筒の先端外
側に、エルボ形の上、下ブローヘッドを昇降連通着脱可
能にして配設し、前記上、下型用砂槽の断面積を連通
筒、補助マガジン、上、下屈曲筒及び上、下ブローヘッ
ドの各砂流路の断面積がほぼ同じにすると共に各砂流路
の屈曲部が流線形に湾曲させることを特徴とするもので
ある。SUMMARY OF THE INVENTION In order to achieve the above object, an upper and lower mold simultaneous blowing type mold molding apparatus according to the present invention is divided into two chambers on the right and left sides by a partition plate extending from the lower end to the upper end. A sand magazine having an upper sand tank and the other being a lower sand tank is provided, and a lower end of the lower sand tank is connected to a J-shaped lower bent cylinder via a communication cylinder and an auxiliary magazine. At the same time, a J-shaped upper bending cylinder is provided in communication with the lower end of the upper mold sand tank, and elbow-shaped upper and lower blow heads are detachably provided at the outer ends of the upper and lower bending cylinders. The cross-sectional areas of the upper and lower mold sand tanks are made substantially the same as the cross-sectional areas of the communicating cylinder, the auxiliary magazine, the upper and lower bent cylinders, and the upper and lower blow heads, and the respective sand flow paths are bent. The part is characterized by being curved in a streamlined manner.

【０００５】[0005]

【発明の実施の形態】以下本発明の実施の形態を図面に
基づいて詳しく説明する。図１において、マガジン内を
下端から上端近くまで延びる仕切板１により左右２室に
区切り、一方を上型用砂槽２、他方を下型用砂槽３に構
成したサンドマガジン４が固定配設されており、該サン
ドマガジン４の周縁は、スリットを透設したスリット筒
体５が外壁６と若干の間隔をおいて内装されていると共
に上側部に圧縮空気供給口７、８が設けられている。な
おサンドマガジン４の上部には、開閉蓋９が被せられて
いる。さらに前記上型用砂槽２の下端はＪ字状の上屈曲
筒１０が連通され、前記下型用砂槽３の下端は、連通筒
１１及び補助マガジン１２を介してＪ字状の下屈曲筒１
３が連通されている。Embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1, the inside of the magazine is divided into two right and left chambers by a partition plate 1 extending from the lower end to near the upper end, and a sand magazine 4 is fixedly provided, one of which is an upper sand tank 2 and the other is a lower sand tank 3. The outer periphery of the sand magazine 4 is provided with a slit cylindrical body 5 having a slit formed therein at a slight distance from an outer wall 6 and a compressed air supply port 7, 8 provided on an upper side. I have. Note that an opening / closing lid 9 is covered on the upper part of the sand magazine 4. Further, a lower end of the upper mold sand tank 2 communicates with a J-shaped upper bent cylinder 10, and a lower end of the lower mold sand tank 3 has a J-shaped lower bent through a communication cylinder 11 and an auxiliary magazine 12. Cylinder 1
3 is communicated.

【０００６】前記上、下屈曲筒１０、１３の先端外側に
は、エルボ形の上、下ブローヘッド１４、１５がシリン
ダ１６、１７により昇降可能にして配設されていて、
上、下屈曲筒１０、１３に連通着脱可能にされている。
また前記上、下ブローヘッド１４、１５の対向する先端
間には、マッチプレート１８を中心にして上、下鋳枠１
９、２０が図示されないシリンダにより昇降可能にして
配置されている。なお図中符号２１は、圧縮空気供給
口、符号２２は、鋳物砂の流動化を促進させるための圧
縮空気噴出口である。Elbow-shaped upper and lower blow heads 14 and 15 are provided outside the distal ends of the upper and lower bent cylinders 10 and 13 so as to be able to move up and down by cylinders 16 and 17, respectively.
The upper and lower bending cylinders 10 and 13 can be connected to and detached from each other.
In addition, between the opposing tips of the upper and lower blow heads 14 and 15, the upper and lower flasks 1 around the match plate 18.
Reference numerals 9 and 20 are arranged so that they can be moved up and down by a cylinder (not shown). In the drawing, reference numeral 21 denotes a compressed air supply port, and reference numeral 22 denotes a compressed air jet port for promoting fluidization of molding sand.

【０００７】なお前記サンドマガジン４の上、下型用砂
槽２、３は図２に示すように断面矩形状を成しており、
これに続く連通筒１１、補助マガジン１２、上、下屈曲
筒１０、１３及び上、下ブローヘッド１４、１５の砂流
路２３、２４、２５、２６の断面積は、上、下型用砂槽
２、３の断面積とほぼ同じにされると共にその形状も矩
形筒状にされている。（なお形状は矩形筒状ではなく円
筒形あるいは楕円筒形にされていてもよい）。さらに
上、下屈曲筒１０、１３及び上、下ブローヘッド１４、
１５の砂流路２５、２６の屈曲部は流線形状に湾曲され
ている。The upper and lower sand tanks 2 and 3 for the sand magazine 4 have a rectangular cross section as shown in FIG.
The cross-sectional areas of the communicating cylinder 11, the auxiliary magazine 12, the upper and lower bent cylinders 10 and 13 and the sand flow paths 23, 24, 25 and 26 of the upper and lower blow heads 14 and 15 are upper and lower sand tanks. The cross-sectional area is almost the same as the cross-sectional area of a few, and the shape is also a rectangular cylindrical shape. (The shape may be cylindrical or elliptical cylindrical instead of rectangular cylindrical). Further, upper and lower bent cylinders 10 and 13 and upper and lower blow heads 14,
The bent portions of the fifteen sand flow paths 25 and 26 are curved in a streamline shape.

【０００８】このように構成されたものは、図１の状態
で開閉蓋９を開いて上下型用砂槽２、３に鋳物砂を所定
量投入して開閉蓋９を閉じた後圧縮空気供給口７、８、
２１及び圧縮空気噴出口２２、２２から圧縮空気を供給
噴出させる。これにより鋳物砂は圧縮空気の流れに乗っ
て連通筒１１、補助マガジン１２、上下屈曲筒１０、１
３、上、下ブローヘッド１４、１５の砂流路２３、２
４、２５、２６に流れて上、下鋳枠１９、２０に吹込み
充填される。この間鋳物砂の流れは砂流路２３、２４、
２５、２６の断面積がほぼ同じにされかつ屈曲部が流線
形状に湾曲されていることから大きな流れの変化がなく
全体的に流動化されながら停滞することなく流れて上、
下鋳枠１４、１５内にブローイング（吹込み）充填され
る。In the above-mentioned structure, the opening / closing lid 9 is opened in the state shown in FIG. 1, a predetermined amount of molding sand is poured into the upper and lower mold sand tanks 2 and 3 and the opening / closing lid 9 is closed. Mouths 7, 8,
The compressed air is supplied and ejected from the compressed air outlet 21 and the compressed air ejection ports 22 and 22. As a result, the foundry sand rides on the flow of compressed air, and the communicating cylinder 11, the auxiliary magazine 12, the vertically bent cylinder 10,
3. Sand passages 23, 2 for upper and lower blow heads 14, 15
It flows into 4, 25, 26 and is blow-filled into upper and lower flasks 19, 20. During this time, the flow of the foundry sand is
Since the cross-sectional areas of 25 and 26 are substantially the same and the bent portion is curved in a streamline shape, there is no large flow change and the whole flows without stagnation while being fluidized.
The lower casting flasks 14 and 15 are filled by blowing.

【０００９】次に圧縮空気供給口７、８、２１及び圧縮
空気噴出口２２、２２からの圧縮空気供給噴出を停止さ
せた後シリンダ１６、１７が作動して上、下ブローヘッ
ド１４、１５を上、下鋳枠１９、２０から引き離し、
上、下鋳枠１９、２０をマッチプレート１８から抜型し
て抜枠位置に移動させると共に新しい空の上、下鋳枠１
９、２０をマッチプレート１８の上下に位置させ、さら
に上、下鋳枠１９、２０をマッチプレート１８に圧着さ
せ、上、下ブローヘッド１４、１５をシリンダ１６、１
７の逆作動により上、下鋳枠１９、２０に圧着させて図
１の状態に戻される。以上の作動を繰り返し行うもので
あるが鋳型の造型において吹込み充填に加えてスクイズ
を必要とするものにおいては、上、下ブローヘッド１
４、１５を上、下鋳枠１９、２０の開口部に嵌入できる
構成にして鋳物砂の吹込み充填の後シリンダ１６、１７
をさらに押出し作動させて上、下ブローヘッド１４、１
５によりスクイズさせるようにする。Next, after the compressed air supply jets from the compressed air supply ports 7, 8, 21 and the compressed air jet ports 22, 22 are stopped, the cylinders 16, 17 are operated, and the upper and lower blow heads 14, 15 are moved. Separated from upper and lower flasks 19 and 20,
The upper and lower flasks 19 and 20 are removed from the match plate 18 and moved to the frame removal position.
9 and 20 are positioned above and below the match plate 18, and the upper and lower casting frames 19 and 20 are pressed against the match plate 18, and the upper and lower blow heads 14 and 15 are moved to the cylinders 16 and 1.
7 is pressed against the upper and lower flasks 19 and 20 to return to the state shown in FIG. The above operation is repeatedly performed. However, in the case where a squeeze is required in addition to the blowing and filling in the molding of the mold, the upper and lower blow heads 1 are used.
4 and 15 are configured to be able to fit into the openings of the upper and lower flasks 19 and 20.
Is further extruded to operate the upper and lower blow heads 14, 1
Squeeze with 5

【００１０】[0010]

【発明の効果】本発明は上記の説明から明らかなよう
に、上、下型用砂槽の断面積と連通筒、補助マガジン、
上、下屈曲筒、及び上、下ブローヘッドの各砂流路の断
面積をほぼ同じにすると共に各砂流路の屈曲部を流線形
状に湾曲させた形状にしたから、鋳物砂のながれに大き
な変化がなくなり、全体的に流動化されながら停滞する
ことなく流れて上、下鋳枠内に鋳物砂を適確に安定して
ブローイング（吹込み）充填するようになる。As is apparent from the above description, the present invention provides a cross-sectional area of the upper and lower mold sand tanks, a communication cylinder, an auxiliary magazine,
Since the cross-sectional area of each sand flow path of the upper, lower bent cylinder, and the upper and lower blow heads is made substantially the same and the bent portion of each sand flow path is curved in a streamline shape, the flow of casting sand is large. There is no change, and it flows without stagnation while being fluidized as a whole, so that the molding sand is properly and stably blown (blown) into the lower casting flask.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の実施形態を示す概要断面図である。FIG. 1 is a schematic sectional view showing an embodiment of the present invention.

【図２】図１におけるＡ−Ａ矢視図である。FIG. 2 is a view taken in the direction of arrows AA in FIG.

【符号の説明】[Explanation of symbols]

１ 仕切板 ２ 上型用砂槽 ３ 下型用砂槽 ４ サンドマガジン １０ 上屈曲筒 １１ 連通筒 １２ 補助マガジン １３ 下屈曲筒 １４ 上ブローヘッド １５ 下ブローヘッド ２３ ２４ ２５ ２６ 砂流路 REFERENCE SIGNS LIST 1 partition plate 2 sand tank for upper mold 3 sand tank for lower mold 4 sand magazine 10 upper bent cylinder 11 communication cylinder 12 auxiliary magazine 13 lower bent cylinder 14 upper blow head 15 lower blow head 23 24 25 26 sand flow path

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】マガジン内を下端から上端近くまで延びる
仕切板１により左右２室に区切り、一方を上型用砂槽
２、他方を下型用砂槽３に構成したサンドマガジン４を
配設し、該下型用砂槽３の下端に連通筒１１及び補助マ
ガジン１２を介してＪ字状の下屈曲筒１３を連通すると
共に前記上型用砂槽２の下端にＪ字状の上屈曲筒１０を
連通して設け、前記上、下屈曲筒１０、１３の先端外側
に、エルボ形の上、下ブローヘッド１４、１５を昇降連
通着脱可能にして配設し、前記上、下型用砂槽２、３の
断面積を連通筒１１、補助マガジン１２、上、下屈曲筒
１０、１３及び上、下ブローヘッド１４、１５の各砂流
路２３、２４、２５、２６の断面積がほぼ同じにすると
共に各砂流路２５、２６の屈曲部が流線形に湾曲させる
ことを特徴とする上下鋳型同時吹込式鋳型造型装置。1. A sand magazine 4 in which the inside of a magazine is divided into two chambers on the left and right sides by a partition plate 1 extending from the lower end to the upper end, one of which is an upper sand tank 2 and the other of which is a lower sand tank 3. A lower end of the lower mold sand tank 3 communicates with a lower end of the upper mold sand tank 2 via a communication cylinder 11 and an auxiliary magazine 12 and a lower end of the upper mold sand tank 2. An elbow-shaped upper and lower blow heads 14 and 15 are provided so as to be detachable from the upper and lower bent cylinders 10 and 13 so as to be vertically movable and detachable. The cross-sectional areas of the sand tanks 2 and 3 are substantially the same as those of the communication cylinder 11, the auxiliary magazine 12, the upper and lower bent cylinders 10 and 13, and the sand flow paths 23, 24, 25 and 26 of the upper and lower blow heads 14 and 15. It is characterized in that the bent portions of the respective sand passages 25 and 26 are curved in a streamlined manner. Mold simultaneous blow-type casting mold making system. 【請求項２】前記上、下型用砂槽２、３及び各砂流路２
３、２４、２５、２６の断面が矩形筒形状にされている
ことを特徴とする請求項１記載の上下鋳型同時吹込式鋳
型造型装置。2. The sand tanks 2 and 3 for the upper and lower dies and the respective sand flow paths 2.
2. The apparatus according to claim 1, wherein the cross-section of each of 3, 24, 25, and 26 has a rectangular cylindrical shape.