JP4379795B2 - Casting sand filling method - Google Patents
Casting sand filling method Download PDFInfo
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- JP4379795B2 JP4379795B2 JP2004125529A JP2004125529A JP4379795B2 JP 4379795 B2 JP4379795 B2 JP 4379795B2 JP 2004125529 A JP2004125529 A JP 2004125529A JP 2004125529 A JP2004125529 A JP 2004125529A JP 4379795 B2 JP4379795 B2 JP 4379795B2
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- 239000004576 sand Substances 0.000 title claims description 123
- 238000005266 casting Methods 0.000 title claims description 75
- 238000000034 method Methods 0.000 title claims description 21
- 238000007664 blowing Methods 0.000 claims description 70
- 230000007246 mechanism Effects 0.000 claims description 46
- 238000000465 moulding Methods 0.000 claims description 42
- 238000007667 floating Methods 0.000 claims description 20
- 239000003110 molding sand Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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Description
本発明は、鋳物砂の充填方法に係り、より詳しくは、側壁に砂吹込み口をそれぞれ有する上・下鋳枠と、これら上・下鋳枠の間に配設したマッチプレートと、前記上・下鋳枠における前記マッチプレートが無いそれぞれの開口部に嵌入可能な複数のスクイズフットを備えた上・下スクイズ手段によって画成した上・下造型空間に、砂浮遊動化手段を備えた砂吹込み機構により、前記上・下鋳枠の前記砂吹込み口から鋳物砂を吹き込み充填する方法に関する。
The present invention relates to a casting sand filling method, and more specifically, upper and lower casting frames each having a sand blowing port on a side wall, a match plate disposed between these upper and lower casting frames,・ Sand with sand floating mobilization means in upper and lower molding spaces defined by upper and lower squeeze means provided with a plurality of squeeze feet that can be inserted into respective openings without the match plate in the lower casting frame The present invention relates to a method of blowing and filling foundry sand from the sand blowing ports of the upper and lower casting frames by a blowing mechanism.
本願の発明者は、鋳型造型装置の一つとして、側壁に砂吹込み口をそれぞれ有する上・下鋳枠と、これら上・下鋳枠の間に配設したマッチプレートと、前記上・下鋳枠における前記マッチプレートが無いそれぞれの開口部に嵌入可能な複数のスクイズフットを備えた上・下スクイズ手段によって画成した上・下造型空間に、砂吹込み機構の砂噴出ノズルにより砂吹込み口から鋳物砂を吹き込んで充填した後、上・下スクイズフットを相互に接近させて上・下造型空間内の鋳物砂を圧縮して鋳型を造型するようにしたものを開発している。
The inventor of the present application, as one of the mold making apparatuses, includes upper and lower casting frames each having a sand blowing port on a side wall, a match plate disposed between the upper and lower casting frames, and the upper and lower casting frames. In the upper and lower molding spaces defined by the upper and lower squeeze means having a plurality of squeeze feet that can be inserted into the respective openings without the match plate in the casting frame, sand blowing is performed by the sand blowing nozzle of the sand blowing mechanism. After the casting sand is blown and filled from the slot, the upper and lower squeeze feet are brought close to each other and the casting sand in the upper and lower molding spaces is compressed to mold the mold.
しかし、このように構成された鋳型造型装置では、上・下造型空間に対する鋳物砂の充填状態を良くすべく、比較的高圧の圧縮空気によって鋳物砂を吹き込むと、砂吹込み機構の砂噴出ノズルが砂詰まりを起こし易く、その鋳物砂の除去作業が非常に厄介であった。 However, in the mold making apparatus configured in this way, when the foundry sand is blown with relatively high-pressure compressed air in order to improve the filling state of the foundry sand into the upper and lower mold forming spaces, the sand blowing nozzle of the sand blowing mechanism However, it was very troublesome to remove the foundry sand.
解決しようとする問題点は、上・下鋳枠とマッチプレートと上・下スクイズフットで画成した垂直状態の上・下造型空間に鋳物砂を吹き込む砂吹込み機構における砂噴出ノズルが砂詰まりを起こし易い点である。
The problem to be solved is that the sand blowing nozzle in the sand blowing mechanism that blows the casting sand into the vertical upper and lower molding spaces defined by the upper and lower casting frames, the match plate, and the upper and lower squeeze feet is clogged. It is a point that is easy to cause.
上記の問題を解消するために本発明の鋳物砂の充填方法は、側壁に砂吹込み口をそれぞれ有する上・下鋳枠と、これら上・下鋳枠の間に配設したマッチプレートと、前記上・下鋳枠における前記マッチプレートが無いそれぞれの開口部に嵌入可能な複数のスクイズフットを備えた上・下スクイズ手段によって画成した上・下造型空間に、砂浮遊動化手段を備えた砂吹込み機構により前記上・下鋳枠の前記砂吹込み口から、鋳物砂を吹き込み充填するに当たり、前記砂吹込み口が上方になるように前記上・下造型空間を垂直状態にするとともに前記砂吹込み口を前記砂吹込み機構の下端に当接する工程と、前記砂吹込み機構の砂浮遊動化手段から圧力０．０５〜０．１８ＭＰａの第１圧縮空気を噴出して前記砂吹込み機構の下部の鋳物砂を浮遊動化させる工程と、前記砂吹込み機構における前記鋳物砂の上方位置に圧力０．０５〜０．１８ＭＰａの第２圧縮空気を供給して前記鋳物砂を加圧し前記上・下造型空間内に吹き込む工程と、を含む鋳物砂の充填方法において、前記上・下鋳枠の側壁に弁機構によって開閉される排気孔をそれぞれ設け、前記上・下造型空間内への鋳物砂吹込み工程の初期段階では前記弁機構の作動によって上・下鋳枠の排気孔を閉じてマッチプレートのベントホールから圧縮空気を排出させることにより、このベントホールの部分に鋳物砂を密に充填させ、また、前記上・下造型空間内への鋳物砂吹込み工程の終期段階では、前記弁機構の作動によって前記上・下鋳枠の排気孔を開いて前記上・下造型空間内の圧縮空気を前記排気孔から排出して、上・下造型空間内の上部にも鋳物砂を密に充填させるとともに上・下造型空間内の圧縮空気の排出を促進することを特徴とする。
In order to solve the above problem, the method for filling the foundry sand of the present invention includes upper and lower casting frames each having a sand blowing port on a side wall, a match plate disposed between these upper and lower casting frames, Sand floating mobilization means is provided in the upper and lower molding spaces defined by the upper and lower squeeze means provided with a plurality of squeeze feet that can be inserted into the respective openings without the match plate in the upper and lower casting frames. from the sand blowing port in the sand blowing mechanism the upper and lower flasks were strikes the fill blowing molding sand, the sand blowing port to the on-lower molding spaces so as to upward vertical position And a step of bringing the sand blowing port into contact with the lower end of the sand blowing mechanism, and the first compressed air having a pressure of 0.05 to 0.18 MPa is blown from the sand floating activating means of the sand blowing mechanism. Floating foundry sand at the bottom of the sand blowing mechanism A step of reduction, blowing the foundry sand by supplying the second compressed air pressure 0.05~0.18MPa the upper position of the molding sand to pressurize the upper and lower molding space in the sand blowing mechanism In the casting sand filling method, including an exhaust hole that is opened and closed by a valve mechanism on the side walls of the upper and lower casting frames, respectively, and an initial stage of the casting sand blowing process into the upper and lower molding spaces Then, by closing the exhaust holes of the upper and lower casting frames by operating the valve mechanism and discharging the compressed air from the vent holes of the match plate, the portions of the vent holes are filled with casting sand. -In the final stage of the casting sand blowing process into the lower molding space, the valve mechanism is operated to open the exhaust holes of the upper and lower casting frames, and the compressed air in the upper and lower molding spaces is discharged from the exhaust holes. Discharge, upper / under construction Characterized in that it promotes the discharge of the compressed air in the upper and lower molding space causes densely filled with molding sand in the upper part of the space.
上記の説明から明らかなように本発明は、側壁に砂吹込み口をそれぞれ有する上・下鋳枠と、これら上・下鋳枠の間に配設したマッチプレートと、前記上・下鋳枠における前記マッチプレートが無いそれぞれの開口部に嵌入可能な複数のスクイズフットを備えた上・下スクイズ手段によって画成した上・下造型空間に、砂浮遊動化手段を備えた砂吹込み機構により前記上・下鋳枠の前記砂吹込み口から、鋳物砂を吹き込み充填するに当たり、前記砂吹込み口が上方になるように前記上・下造型空間を垂直状態にするとともに前記砂吹込み口を前記砂吹込み機構の下端に当接する工程と、前記砂吹込み機構の砂浮遊動化手段から圧力０．０５〜０．１８ＭＰａの第１圧縮空気を噴出して前記砂吹込み機構の下部の鋳物砂を浮遊動化させる工程と、前記砂吹込み機構における前記鋳物砂の上方位置に圧力０．０５〜０．１８ＭＰａの第２圧縮空気を供給して前記鋳物砂を加圧し前記上・下造型空間内に吹き込む工程と、を含む鋳物砂の充填方法において、前記上・下鋳枠の側壁に弁機構によって開閉される排気孔をそれぞれ設け、前記上・下造型空間内への鋳物砂吹込み工程の初期段階では前記弁機構の作動によって上・下鋳枠の排気孔を閉じてマッチプレートのベントホールから圧縮空気を排出させることにより、このベントホールの部分に鋳物砂を密に充填させ、また、前記上・下造型空間内への鋳物砂吹込み工程の終期段階では、前記弁機構の作動によって前記上・下鋳枠の排気孔を開いて前記上・下造型空間内の圧縮空気を前記排気孔から排出して、上・下造型空間内の上部にも鋳物砂を密に充填させるとともに上・下造型空間内の圧縮空気の排出を促進するから、圧力が比較的低い圧縮空気によって鋳物砂を吹き込むため、砂吹込み機構の砂噴出ノズルが砂詰まりを起こすのを防止することができるなどの優れた実用的効果を奏する。
As is apparent from the above description, the present invention includes upper and lower casting frames each having a sand blowing port on a side wall, a match plate disposed between the upper and lower casting frames, and the upper and lower casting frames. In the upper and lower molding spaces defined by the upper and lower squeeze means having a plurality of squeeze feet that can be inserted into the respective openings without the match plate, the sand blowing mechanism having the sand floating moving means is used. from the sand blowing port of the upper and lower flasks, hit the filling blowing molding sand, the sand blowing ports with the sand blowing port to the on-lower molding spaces so as to upward vertical position In contact with the lower end of the sand blowing mechanism, and the first compressed air having a pressure of 0.05 to 0.18 MPa is blown from the sand floating mobilization means of the sand blowing mechanism to lower the sand blowing mechanism. The process of floating the casting sand of And a step of blowing the foundry sand by supplying the second compressed air pressure 0.05~0.18MPa pressurized the upper and lower molding space to a position above the molding sand in the sand blowing mechanism In the casting sand filling method, exhaust holes that are opened and closed by a valve mechanism are provided on the side walls of the upper and lower casting frames, respectively, and at the initial stage of the casting sand blowing process into the upper and lower molding spaces, By closing the exhaust holes of the upper and lower casting frames by operation and discharging the compressed air from the vent holes of the match plate, the portions of the vent holes are filled with foundry sand, and the inside of the upper and lower molding spaces In the final stage of the casting sand blowing process, the valve mechanism is operated to open the exhaust holes of the upper and lower casting frames to discharge the compressed air in the upper and lower molding spaces from the exhaust holes.・ In the upper part of the lower molding space Since facilitate the discharge of the compressed air of the upper and lower molding space causes densely filled with molding sand, to blow molding sand with a relatively low compressed air pressure, sand ejection nozzle sand blowing mechanism sand clogging It has excellent practical effects such as being able to prevent it from happening.
本発明を適用した鋳枠無し上・下鋳型の造型装置の最良の形態について図１および図２に基づき詳細に説明する。図１に示すように、本鋳枠無し上・下鋳型の造型装置は、側壁に砂吹込み口をそれぞれ有する１対の上・下鋳枠１・２と；これら１対の上・下鋳枠１・２の間に入出可能に配設しかつベントホールを透設したマッチプレート３と；前記１対の上・下鋳枠１・２によって前記マッチプレート３を挟持し前記上・下鋳枠１・２における前記マッチプレート３が無いそれぞれの開口部に複数の上・下スクイズフット４ａ・４ａ・５ａ・５ａを備えた上・下スクイズ手段４・５の上・下スクイズフット４ａ・４ａ・５ａ・５ａをそれぞれ入出可能に設けかつ前記マッチプレート３を挟持した前記１対の上・下鋳枠１・２が垂直状態になる位置と水平状態になる位置の間を垂直面内で正逆回転可能にして支持した鋳物砂スクイズ機構６と；図示しない機台の天井部に装着しかつ垂直状態にある前記１対の上・下鋳枠１・２に対して前記砂吹込み口から鋳物砂を吹き込む砂吹込み機構７と；で構成してある。 BEST MODE FOR CARRYING OUT THE INVENTION The best mode of a casting frameless upper / lower mold making apparatus to which the present invention is applied will be described in detail with reference to FIGS. As shown in FIG. 1, the upper and lower mold making apparatus without a main frame includes a pair of upper and lower casting frames 1 and 2 each having a sand blowing port on a side wall; A match plate 3 which is detachably disposed between the frames 1 and 2 and has a vent hole formed therein; the match plate 3 is sandwiched between the pair of upper and lower casting frames 1 and 2 and the upper and lower castings Upper and lower squeeze feet 4a and 4a provided with a plurality of upper and lower squeeze feet 4a, 4a, 5a and 5a at respective openings in the frames 1 and 2 where the match plate 3 is not provided.・ 5a and 5a are provided so as to be able to enter and exit, and the pair of upper and lower casting frames 1 and 2 sandwiching the match plate 3 are positioned in a vertical plane between the vertical position and the horizontal position. Foundry sand squeeze mechanism 6 supported in a reverse rotation manner; Of attached to the ceiling and the sand blowing mechanism 7 for blowing molding sand from the sand blowing port with respect to the upper and lower flasks 1, 2 of the pair in a vertical state; are constituted by.
そして、前記鋳物砂スクイズ機構６においては、回転フレーム８が中心付近にて垂直面内で正逆回転自在に枢支して設けてあり、この回動フレーム８の下面には左右方向へ延びる一対のガイドロッド９・９が前後方向へ所要の間隔をおいて装着してある。この一対のガイドロッド９・９間における右部には上昇降フレーム１０が、また、前記一対のガイドロッド９・９間における左部には下昇降フレーム１１が、一体的に設けたホルダー部を介しそれぞれ摺動自在にして架装してあり、これら上・下昇降フレーム１０・１１は前記回転フレーム８に装着した上向きシリンダ（図示せず）および下向きシリンダ（図示せず）の伸縮作動によって相互に接近・離隔するようになっている。 In the foundry sand squeeze mechanism 6, a rotating frame 8 is pivotally supported in the vicinity of the center so as to be able to rotate in the forward and reverse directions. A pair of lower surfaces of the rotating frame 8 extend in the left-right direction. Guide rods 9 and 9 are mounted in the front-rear direction at a required interval. An upper lifting frame 10 is provided at the right portion between the pair of guide rods 9 and 9, and a lower lifting frame 11 is integrally provided at the left portion between the pair of guide rods 9 and 9. These upper and lower lifting frames 10 and 11 are slidably mounted on each other by the expansion and contraction operation of an upward cylinder (not shown) and a downward cylinder (not shown) mounted on the rotary frame 8. It comes to approach and separate from.
また、前記１対の上・下鋳枠１・２には排気孔１４・１５がそれぞれ透設してあり、排気孔１４・１５は、前記１対の上・下鋳枠１・２にそれぞれ装着された弁機構２３・２４によって開閉するようになっている。
また、前記上昇降フレーム１０には前記上スクイズフット４ａ・４ａを進退させる複数のシリンダ１２・１２が、また、前記下昇降フレーム１１には前記下スクイズフット５ａ・５ａを進退させる複数のシリンダ１３・１３がそれぞれ装着してある。
The pair of upper and lower casting frames 1 and 2 are provided with exhaust holes 14 and 15, respectively. The exhaust holes 14 and 15 are provided in the pair of upper and lower casting frames 1 and 2, respectively. It opens and closes by the mounted valve mechanisms 23 and 24.
The upper lifting frame 10 has a plurality of cylinders 12 and 12 for moving the upper squeeze feet 4a and 4a back and forth, and the lower lifting frame 11 has a plurality of cylinders 13 for moving the lower squeeze feet 5a and 5a back and forth.・ 13 are installed.
また、前記砂吹込み機構７は、本体１６の上部が小・大二段の円筒状を、また下部が二股状をそれぞれ成しており、さらに下端が図示する状態の上・下鋳枠１・２の砂吹込み口に当接可能になっている。また、前記本体１６の上面には本体１６の上端開口部を開閉する開閉機構１７が装着してある。さらに、前記砂吹込み機構７の下部には鋳物砂を浮遊動化させる第１圧縮空気を噴射する２個の砂浮遊動化手段１８・１８が装着してあり、浮遊動化手段１８・１８は開閉弁１９を介して圧縮空気源（図示せず）に接続してある。なお、前記砂浮遊動化手段１８・１８から噴出する圧縮空気の圧力は０．０５〜０．１８MPaが好ましい。 また、前記本体１６の上部には鋳物砂を加圧する第２圧縮空気を供給する圧縮空気源（図示せず）が開閉弁２０を介して接続してある。また、前記砂浮遊動化手段１８および前記本体１６の上部には、圧縮空気の圧力をそれぞれ検知する圧力センサ２１・２２がそれぞれ装着してある。さらに、前記本体１６の上部は開閉弁２５を介して外気と連通している。 The sand blowing mechanism 7 has an upper and lower casting frame 1 in which the upper portion of the main body 16 has a small and large two-stage cylindrical shape and the lower portion has a bifurcated shape, and the lower end is illustrated.・ It is possible to abut on the sand blowing port of 2. An opening / closing mechanism 17 for opening and closing the upper end opening of the main body 16 is mounted on the upper surface of the main body 16. Further, two sand floating mobilization means 18 and 18 for injecting the first compressed air for floating and casting sand are attached to the lower part of the sand blowing mechanism 7, and the floating mobilization means 18 and 18 are mounted. Is connected to a compressed air source (not shown) through an on-off valve 19. The pressure of the compressed air ejected from the sand floating mobilization means 18, 18 is preferably 0.05 to 0.18 MPa. A compressed air source (not shown) that supplies second compressed air that pressurizes the foundry sand is connected to the upper portion of the main body 16 via an on-off valve 20. Pressure sensors 21 and 22 for detecting the pressure of compressed air are mounted on the sand floating mobilization means 18 and the main body 16, respectively. Further, the upper portion of the main body 16 communicates with the outside air via the on-off valve 25.
このように構成したものは、図１に示すように、上・下鋳枠１・２の排気孔１４・１５を弁機構２３・２４によってそれぞれ閉じ、かつ、本体１６内に所定量の鋳物砂を投入した後、上・下鋳枠１・２とマッチプレート３と上・下スクイズ手段４・５によって画成した上・下造型空間を垂直状態にするとともに上・下鋳枠１・２の砂吹込み口を砂吹込み機構７の下端に当接し、続いて、開閉弁１９・２０をそれぞれ開いて砂浮遊動化手段１８・１８と、本体１６内における鋳物砂の上方位置に圧縮空気をそれぞれ供給する。この場合、図２に示すように、砂浮遊動化手段１８・１８および本体１６内に供給する圧縮空気の圧力を、圧力センサ２１・２２によってそれぞれ検知しながら時間の経過とともに段階的に上昇させて、本体１６内における鋳物砂の上方位置の実質圧力を目標圧力に可及的に近づける。 そして、本体１６内の鋳物砂が砂浮遊動化手段１８・１８のチャンバー内に侵入するのを防止すべく、砂浮遊動化手段１８・１８に供給する圧縮空気の圧力を、本体１６内に供給する圧縮空気の圧力より所要値高くする。 1, the exhaust holes 14 and 15 of the upper and lower casting frames 1 and 2 are closed by valve mechanisms 23 and 24, respectively, and a predetermined amount of foundry sand is placed in the main body 16, as shown in FIG. The upper and lower molding spaces defined by the upper and lower casting frames 1 and 2, the match plate 3 and the upper and lower squeezing means 4 and 5 are made vertical, and the upper and lower casting frames 1 and 2 are The sand blowing port is brought into contact with the lower end of the sand blowing mechanism 7, and then the open / close valves 19 and 20 are opened, respectively, and the compressed air is placed above the foundry sand in the sand floating mobilization means 18 and 18 and the main body 16. Supply each. In this case, as shown in FIG. 2, the pressure of the compressed air supplied into the sand floating mobilization means 18 and 18 and the main body 16 is increased step by step while being detected by the pressure sensors 21 and 22, respectively. Thus, the actual pressure at the upper position of the foundry sand in the main body 16 is made as close as possible to the target pressure. In order to prevent the foundry sand in the main body 16 from entering the chamber of the sand floating mobilization means 18, 18, the pressure of the compressed air supplied to the sand floating mobilization means 18, 18 is applied to the main body 16. Make the required value higher than the pressure of the compressed air to be supplied.
すなわち、砂浮遊動化手段１８・１８から圧力０．０５〜０．１８ＭＰａの第１圧縮空気を噴出して砂吹込み機構７の本体１６の下部の鋳物砂を浮遊動化させ、これと同時に、本体１６の鋳物砂の上方位置に第２圧縮空気を供給して鋳物砂を加圧し上・下造型空間内にそれぞれ吹き込む。この結果、上・下造型空間内には比較的圧力の低い圧縮空気によって鋳物砂が吹き込まれることになる。 That is, the first compressed air having a pressure of 0.05 to 0.18 MPa is jetted from the sand floating mobilization means 18, 18 to float the casting sand below the main body 16 of the sand blowing mechanism 7, and at the same time The second compressed air is supplied to the upper position of the foundry sand of the main body 16 to pressurize the foundry sand and blow it into the upper and lower molding spaces. As a result, foundry sand is blown into the upper and lower molding spaces by compressed air having a relatively low pressure.
そして、上・下造型空間内への鋳物砂吹込み工程の初期段階では弁機構２３・２４の作動によって上・下鋳枠１・２の排気孔１４・１５を閉じてマッチプレート３のベントホールから圧縮空気を排出させることにより、このベントホールの部分に鋳物砂を密に充填させる。上・下造型空間内への鋳物砂吹込み工程の終期段階では、弁機構２３・２４の作動によって上・下鋳枠１・２の排気孔１４・１５を開いて上・下造型空間内の圧縮空気を上・下鋳枠１・２の排気孔１４・１５から排出して、上・下造型空間内の上部にも鋳物砂を密に充填させるとともに上・下造型空間内の圧縮空気の排出を促進する。 In the initial stage of the casting sand blowing process into the upper and lower molding spaces, the vent holes 14 and 15 of the upper and lower casting frames 1 and 2 are closed by the operation of the valve mechanisms 23 and 24, and the vent holes of the match plate 3 are formed. Compressed air is discharged from the air so that the portion of the vent hole is closely filled with foundry sand. In the final stage of the casting sand blowing process into the upper and lower molding spaces, the valve mechanisms 23 and 24 are operated to open the exhaust holes 14 and 15 of the upper and lower casting frames 1 and 2 to Compressed air is discharged from the exhaust holes 14 and 15 of the upper and lower casting frames 1 and 2 so that the upper part of the upper and lower molding spaces is densely filled with foundry sand, and the compressed air in the upper and lower molding spaces is Promote emissions.
なお、上述した鋳枠無し上・下鋳型の造型装置の最良の形態では、第１圧縮空気の圧力を第２圧縮空気の圧力より高く維持しかつこれらの圧縮空気の圧力を時間の経過とともに段階的に上昇させながら、第１・第２圧縮空気を砂吹込み機構に供給するようにしたが、上・下造型空間に鋳物砂を可及的にして充分に充填すべく、造型した鋳型の高さの測定結果に基づき、上・下造型空間の容積に対応させて、
砂吹込み機構に対する第１圧縮空気および第２圧縮空気の圧力と供給時間をそれぞれ調整するようにしてもよい。
In the best form of the above-mentioned upper and lower mold making apparatus without a casting frame, the pressure of the first compressed air is maintained higher than the pressure of the second compressed air, and the pressure of these compressed air is increased over time. Although the first and second compressed air is supplied to the sand blowing mechanism while being raised, the upper and lower molding spaces are filled with the casting sand as much as possible to sufficiently fill the molding mold. Based on the height measurement results, corresponding to the volume of the upper and lower molding space,
The pressure and supply time of the first compressed air and the second compressed air with respect to the sand blowing mechanism may be adjusted.
発明を実施するための最良の形態では鋳枠無し上・下鋳型の造型装置について説明したが、鋳枠を造型毎に変える鋳枠付き上・下鋳型の造型装置にも適用することができるのは言うまでもない。 In the best mode for carrying out the invention, an apparatus for molding upper and lower molds without a casting frame has been described. However, the present invention can also be applied to a molding apparatus for upper and lower molds with a casting frame that changes the casting frame for each molding. Needless to say.
１ 上鋳枠
２ 下鋳枠
１４；１５ 排気孔
1 Upper casting frame 2 Lower casting frame 14; 15 Exhaust hole
Claims (3)
前記上・下鋳枠の側壁に弁機構によって開閉される排気孔をそれぞれ設け、
前記上・下造型空間内への鋳物砂吹込み工程の初期段階では前記弁機構の作動によって上・下鋳枠の排気孔を閉じてマッチプレートのベントホールから圧縮空気を排出させることにより、このベントホールの部分に鋳物砂を密に充填させ、また、前記上・下造型空間内への鋳物砂吹込み工程の終期段階では、前記弁機構の作動によって前記上・下鋳枠の排気孔を開いて前記上・下造型空間内の圧縮空気を前記排気孔から排出して、上・下造型空間内の上部にも鋳物砂を密に充填させるとともに上・下造型空間内の圧縮空気の排出を促進することを特徴とする鋳物砂の充填方法。 The upper and lower casting frames each having a sand blowing port on the side wall, the match plate disposed between the upper and lower casting frames, and the respective openings of the upper and lower casting frames without the match plate The sand blowing port of the upper and lower casting frames is formed by a sand blowing mechanism having sand floating movement means in upper and lower molding spaces defined by upper and lower squeezing means having a plurality of possible squeeze feet. from impinges on filling blowing molding sand, abut the sand blowing port with the sand blowing port to the on-lower molding spaces to be upwardly vertical state to the lower end of the sand blowing mechanism step And the step of floating the casting sand below the sand blowing mechanism by blowing the first compressed air having a pressure of 0.05 to 0.18 MPa from the sand floating moving means of the sand blowing mechanism, Of the foundry sand in the sand blowing mechanism A step of supplying a second compressed air pressure 0.05~0.18MPa in a square position blow the molding sand to pressurize the upper and lower molding space, in the filling method of casting sand comprising,
Exhaust holes that are opened and closed by a valve mechanism are provided in the side walls of the upper and lower casting frames,
In the initial stage of the casting sand blowing process into the upper and lower molding spaces, the valve mechanism is operated to close the exhaust holes of the upper and lower casting frames and discharge the compressed air from the vent holes of the match plate. At the final stage of the casting sand blowing process into the upper and lower molding spaces, the exhaust holes of the upper and lower casting frames are opened by the operation of the valve mechanism. Open and discharge the compressed air in the upper and lower molding spaces from the exhaust hole, and also densely fill the casting sand in the upper part of the upper and lower molding spaces and discharge the compressed air in the upper and lower molding spaces. A method for filling foundry sand, characterized in that
前記第１圧縮空気の圧力を前記第２圧縮空気の圧力より高く維持しかつこれらの圧縮空気Maintaining the pressure of the first compressed air higher than the pressure of the second compressed air and these compressed air
の圧力を時間の経過とともに段階的に上昇させながら、前記第１・第２圧縮空気を前記砂While increasing the pressure of the first and second compressed air stepwise over time,
吹込み機構に供給し、前記砂吹込み機構における前記鋳物砂の上方位置の圧力が目標値にThe pressure at the upper position of the foundry sand in the sand blowing mechanism is set to the target value.
なった後は、前記第１圧縮空気の圧力を前記第２圧縮空気の圧力より高く維持しながら前After that, the pressure of the first compressed air is maintained higher than the pressure of the second compressed air.
記砂吹込み機構から排気することを特徴とする鋳物砂の充填方法。A casting sand filling method, characterized by exhausting air from a sand blowing mechanism.
前記上・下造型空間に鋳物砂を可及的にして充分に充填すべく、造型した鋳型の高さの測定結果に基づき、前記上・下造型空間の容積に対応させて、前記砂吹込み機構に対する前記第１圧縮空気および前記第２圧縮空気の圧力と供給時間をそれぞれ調整することを特徴とする鋳物砂の充填方法。
In the filling method of the foundry sand according to claim 1 or 2 ,
In order to fill the upper and lower molding spaces with casting sand as much as possible, the sand blowing is performed in accordance with the volume of the upper and lower molding spaces based on the measurement result of the height of the molded mold. A casting sand filling method, wherein the pressure and the supply time of the first compressed air and the second compressed air to the mechanism are adjusted .
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004125529A JP4379795B2 (en) | 2004-04-21 | 2004-04-21 | Casting sand filling method |
| DE602005023142T DE602005023142D1 (en) | 2004-04-21 | 2005-04-21 | METHOD FOR PRODUCING A SAND FORM |
| EP05734688A EP1738847B1 (en) | 2004-04-21 | 2005-04-21 | Method for manufacturing sandmold |
| CN2005800197216A CN1968771B (en) | 2004-04-21 | 2005-04-21 | Method for manufacturing molding sand |
| PCT/JP2005/007615 WO2005102561A1 (en) | 2004-04-21 | 2005-04-21 | Method for manufacturing sandmold |
| US11/578,772 US7726380B2 (en) | 2004-04-21 | 2005-04-21 | Method for manufacturing sand mold |
| DK05734688.4T DK1738847T3 (en) | 2004-04-21 | 2005-04-21 | Process for making a sand mold |
| EA200601926A EA009613B1 (en) | 2004-04-21 | 2005-04-21 | Method for manufacturing sandmold |
| BRPI0510161-1B1A BRPI0510161B1 (en) | 2004-04-21 | 2005-04-21 | sand mold production method |
| MXPA06012156A MXPA06012156A (en) | 2004-04-21 | 2005-04-21 | Method for manufacturing sandmold. |
| AT05734688T ATE478745T1 (en) | 2004-04-21 | 2005-04-21 | METHOD FOR MAKING A SAND MOLD |
| KR1020067023827A KR100866694B1 (en) | 2004-04-21 | 2005-04-21 | Method for manufacturing sandmold |
| CN2008101733057A CN101396722B (en) | 2004-04-21 | 2005-04-21 | Method for filling molding sand |
| US12/662,283 US20110024071A1 (en) | 2004-04-21 | 2010-04-08 | Method of producing sand mold |
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| WO2011142049A1 (en) * | 2010-05-13 | 2011-11-17 | 新東工業株式会社 | Mold molding device and mold molding method |
| JP6042594B2 (en) * | 2010-11-26 | 2016-12-14 | 新東工業株式会社 | Raw mold making method |
| DK2712690T3 (en) | 2011-06-03 | 2016-08-22 | Sintokogio Ltd | Core Sand Filling Accommodation and core sand filling method in core making machine |
| JP6028796B2 (en) | 2012-05-23 | 2016-11-16 | 新東工業株式会社 | Core molding apparatus and core molding method |
| JP5884904B2 (en) | 2012-05-25 | 2016-03-15 | 新東工業株式会社 | Core sand filling method |
| JP6601508B2 (en) * | 2016-02-10 | 2019-11-06 | 新東工業株式会社 | Mold making machine, sand filling compression unit and mold making method |
| KR20180109857A (en) * | 2016-02-10 | 2018-10-08 | 신토고교 가부시키가이샤 | Molding machine |
| WO2018016123A1 (en) * | 2016-07-20 | 2018-01-25 | 新東工業株式会社 | Mold forming method |
| CN114713777B (en) * | 2022-04-15 | 2024-03-15 | 苏州明志科技股份有限公司 | Core shooting device of ultra-large core shooter and control method thereof |
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| US6752196B2 (en) * | 2000-02-17 | 2004-06-22 | Sintokogio, Ltd. | Method and device for filling casting sand |
| MXPA01012793A (en) * | 2000-04-13 | 2003-07-21 | Sintokogio Ltd | Compressing method for casting sand and device therefor. |
| US6823929B2 (en) * | 2000-04-21 | 2004-11-30 | Sintokogio, Ltd. | Die molding machine and pattern carrier |
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