JP2772869B2 - Mold making method - Google Patents

Mold making method

Info

Publication number
JP2772869B2
JP2772869B2 JP33858690A JP33858690A JP2772869B2 JP 2772869 B2 JP2772869 B2 JP 2772869B2 JP 33858690 A JP33858690 A JP 33858690A JP 33858690 A JP33858690 A JP 33858690A JP 2772869 B2 JP2772869 B2 JP 2772869B2
Authority
JP
Japan
Prior art keywords
sand
plate
molding sand
compressed air
casting
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.)
Expired - Fee Related
Application number
JP33858690A
Other languages
Japanese (ja)
Other versions
JPH04200956A (en
Inventor
康生 森部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sintokogio Ltd
Original Assignee
Sintokogio Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sintokogio Ltd filed Critical Sintokogio Ltd
Priority to JP33858690A priority Critical patent/JP2772869B2/en
Publication of JPH04200956A publication Critical patent/JPH04200956A/en
Application granted granted Critical
Publication of JP2772869B2 publication Critical patent/JP2772869B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Casting Devices For Molds (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、垂直状態に配置されたマッチプレートに鋳
枠を枠合せし、鋳枠の外側開口をスクイズ板で密閉し、
鋳物砂を鋳枠の上壁部から圧縮空気と共に吸込み充填
し、スクイズ板により圧縮して鋳型を造型する方法の改
良に関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of aligning a casting flask with a vertically arranged match plate, sealing an outer opening of the casting flask with a squeeze plate,
The present invention relates to an improvement in a method of sucking and filling casting sand together with compressed air from an upper wall portion of a casting frame and compressing the molding sand with a squeeze plate to form a mold.

(従来技術と問題点) 上記のような鋳型の造型方法においては垂直状態に配
置されたマッチプレートと鋳枠の下壁部とで構成される
島部等に鋳物砂が十分に充填されない問題があった。
(Prior art and problems) In the method of molding a mold as described above, there is a problem that molding sand is not sufficiently filled in an island portion formed by a vertically arranged match plate and a lower wall portion of a casting frame. there were.

そこで鋳物砂の吸込み充填に際してスクイズ板側から
マッチプレート側に向けて圧縮空気を噴射させながら鋳
物砂を吹き込む方法が提案されている(特公昭60−4826
1号公報)が深い島部等はこの方法でも十分な充填がな
されずその後に行なわれるスクイズ板による砂圧縮でも
マッチプレート近辺の鋳型性状が不十分であることが多
く、造型可能な鋳型形状範囲が限られるという問題があ
った。
Therefore, there has been proposed a method in which molding sand is blown while blowing compressed air from the squeeze plate side toward the match plate side during suction filling of the molding sand (Japanese Patent Publication No. 60-4826).
In the case of deep islands where there is a deep area, the mold properties near the match plate are often inadequate even when sand is compressed by a squeeze plate. There was a problem that was limited.

(目的) 本発明ほ上記の問題に鑑みて無されたもので、深い島
部等があっても鋳物砂が十分に充填され、かつマッチプ
レート近辺の砂圧縮が十分になされ鋳型性状を良好なも
のにする鋳型造型方法を提供することを目的とするもの
である。
(Purpose) The present invention has been made in view of the above-mentioned problems. Even when there are deep islands, the molding sand is sufficiently filled, and the sand in the vicinity of the match plate is sufficiently compressed to improve the mold properties. It is an object of the present invention to provide a method of molding a mold.

(問題解決のための手段) 上記の目的を達成するために本発明における鋳型造型
方法は、垂直状態に配置されたマッチプレートの両側部
に、その上壁部に砂充填口を穿った鋳枠をそれぞれ枠合
せすると共に該砂充填口から鋳物砂を該鋳枠内に圧縮空
気と共に吸込み充填し、該吸込み充填された鋳物砂を前
記スクイズ板により圧縮して鋳型を造型する方法であっ
て、前記鋳物砂を圧縮空気と共に吸込み充填する際に、
前記鋳枠の下壁部から上方に向けると共にスクイズ板側
からマッチプレート方向に向けてそれぞれ減圧されたエ
ヤーを供給して鋳物砂を流動化させながらマッチプレー
トに向って移動充填し、鋳物砂の充填が完了した後スク
イズ板からマッチプレートに向けて高圧圧縮空気を供給
して鋳枠の壁部及び/又はマッチプレートから排気して
マッチプレート近辺の鋳物砂を予備圧縮し、その後にス
クイズ板による鋳物砂圧縮を行なうことを特徴とするも
のである。
(Means for Solving the Problem) In order to achieve the above object, a method for molding a mold according to the present invention comprises a casting frame having a sand filling port formed on both sides of a vertically arranged match plate and an upper wall portion thereof. A method of molding a mold by sucking and filling molding sand with compressed air from the sand filling port together with compressed air from the sand filling port, and compressing the suction-filled molding sand by the squeeze plate. When sucking and filling the foundry sand with compressed air,
While moving upward from the lower wall of the casting frame and supplying depressurized air toward the match plate from the squeeze plate side to fluidize the molding sand, the molding sand is moved and filled toward the match plate. After the filling is completed, high-pressure compressed air is supplied from the squeeze plate to the match plate to exhaust from the wall of the casting frame and / or the match plate to pre-compress the molding sand near the match plate, and then use the squeeze plate. It is characterized by performing molding sand compression.

(作用) 本発明は上記のような方法により鋳型を造型するよう
にしたから、圧縮空気と共に吸込まれた鋳物砂は、鋳枠
下壁からのエヤー吹き上げにより流動化された状態にな
ると共にスクイズ板側からマッチプレート方向に向けて
のエヤーの供給により鋳物砂を充填しにくい深い島部に
対しても十分に充填を行ない、さらに充填後において圧
縮空気をスクイズプレート側からマッチプレート方向に
供給通気させることにより、マッチプレート近辺の鋳物
砂を、予備圧縮してキャビライーとなる部分の鋳物砂の
硬度を高めた上でスクイズ板により鋳物砂全体を圧縮し
て鋳型としての全体強度を与えられる。
(Function) In the present invention, the mold is formed by the above-described method, so that the molding sand sucked together with the compressed air is fluidized by air blowing up from the lower wall of the flask and the squeeze plate is formed. Air is supplied from the side to the match plate direction to sufficiently fill the deep islands where casting sand is difficult to fill, and after filling, compressed air is supplied from the squeeze plate side to the match plate direction and aerated. Thereby, the molding sand in the vicinity of the match plate is pre-compressed to increase the hardness of the molding sand in a portion to be a cavity, and then the entire molding sand is compressed by the squeeze plate to give the overall strength as a mold.

(実施例) 以下本発明を実施する鋳型造装置について第1図によ
り説明する。模型表面から内部で側面方向に屈曲して大
気に通じる多数のベントホール(1)(1)を穿ったマ
ッチプレート(2)を垂直状態に保持し、このマッチプ
レート(2)の左右に、上壁部に砂充填口(3)(3)
を穿った鋳枠(4)(4)が枠合せされている。尚、鋳
枠(4)(4)のマッチプレート(2)寄り上下壁部に
は大気に通じるベントホール(5)(5)が設けられて
いると共に鋳枠(4)(4)の背部開口(6)(6)寄
り下壁部には切換弁(7)及び減圧弁(8)を介して図
示されない圧縮空気源に通じる配管(9)の先端に連通
するエヤー吹き上げ孔(10)(10)がそれぞれ穿ってあ
る。
(Example) Hereinafter, a mold making apparatus for carrying out the present invention will be described with reference to FIG. A match plate (2) having a large number of vent holes (1) and (1) drilled in a lateral direction from the surface of the model to the atmosphere is held in a vertical state. Sand filling port on the wall (3) (3)
The casting frames (4) and (4) are formed by drilling. Vent holes (5) and (5) are provided on the upper and lower walls of the flasks (4) and (4) near the match plate (2), and the openings at the back of the flasks (4) and (4). (6) The air blow-up holes (10) (10) (10) which are connected to the tip of a pipe (9) leading to a compressed air source (not shown) through a switching valve (7) and a pressure reducing valve (8) in the lower wall portion near the (6). ) Is worn.

該鋳枠(4)(4)の背部開口(5)(5)にはシリ
ンダ(11)(11)に連結されたスクイズ板(12)(12)
が嵌入されていて、鋳枠(4)(4)内を密閉状態にし
ている。尚スクイズ板(12)(12)の壁内には中空室
(13)(13)が構成されていて、該中空室(13)(13)
にはスクイズ板(12)(12)の表面に連通する多数の圧
縮空気噴出孔(14)(14)が穿ってあると共に、該中空
室(13)(13)は切換弁(15)及び減圧弁(16)を介し
て図示されない圧縮空気源に通じる配管(17)の先端に
連通されている。
The squeeze plates (12) (12) connected to the cylinders (11) and (11) are located in the back openings (5) and (5) of the flasks (4) and (4).
Are inserted, and the inside of the flask (4) (4) is sealed. Hollow chambers (13) and (13) are formed in the walls of the squeeze plates (12) and (12).
Each of the squeeze plates (12) and (12) is provided with a number of compressed air ejection holes (14) and (14) communicating with the surfaces thereof, and the hollow chambers (13) and (13) are provided with a switching valve (15) and a pressure reducing valve. The pipe (17) communicates with a distal end of a pipe (17) that communicates with a compressed air source (not shown) via a valve (16).

該鋳枠(4)(4)の上方には図示されないシリンダ
により昇降されるブローヘッド(18)が配置されてい
て、該ブローヘッド(18)の砂吹込口(19)(19)下部
には、高さ寸法を前記砂充填口(3)(3)の高さ寸法
と同一にすると共に、外形寸法を該砂充填口(3)
(3)の内形よりも若干細くしたノズル口(20)(20)
が該砂充填口(3)(3)に対応させて取付けられてい
る。
Above the flasks (4) and (4), a blow head (18) which is moved up and down by a cylinder (not shown) is arranged, and below the sand blowing ports (19) and (19) of the blow head (18). The height dimension of the sand filling port (3) is the same as the height dimension of the sand filling port (3), and the external dimensions are the same.
Nozzle opening (20) (20) slightly thinner than the inner shape of (3)
Are provided corresponding to the sand filling ports (3) and (3).

このように構成されたものは、鋳物砂(S)を導入し
たブローヘッド(18)を図示されないシリンダの作動に
より下降させノズル口(20)(20)を鋳枠(4)(4)
の砂充填口(3)(3)にその下端が鋳枠(4)(4)
の上壁内面と同一面になるまで挿入圧着する。
In the case of such a construction, the blow head (18) into which the casting sand (S) is introduced is lowered by the operation of a cylinder (not shown), and the nozzle openings (20) and (20) are moved to the casting flasks (4) and (4).
The lower end of the sand filling port (3) (3) is cast flask (4) (4)
Insert and crimp until it is flush with the inner surface of the upper wall.

次に、切替弁(7)(15)を介して配管(9)(17)
を圧縮空気源に連通してエアー吹き上げ孔(10)(10)
及び圧縮空気噴出孔(14)(14)から減圧(後述の予備
圧縮の圧力よりも減圧)された圧縮空気を鋳枠(4)
(4)内に供給しながら、ブローヘッド(18)を作動さ
せて鋳物砂(S)を圧縮空気と共にノズル口(20)(2
0)を介して鋳枠(4)(4)内に吹き込む。
Next, piping (9) (17) via the switching valves (7) (15)
To the compressed air source to blow air (10) (10)
The compressed air that has been depressurized (depressurized below the pre-compression pressure described later) from the compressed air ejection holes (14) (14) is cast into a flask (4).
(4) The blow head (18) is operated to supply the molding sand (S) together with the compressed air to the nozzle openings (20) (2)
0) is blown into the flask (4) (4).

この際吹込まれた鋳物砂(S)は下方からの吹き上げ
作用により流動化状態にされると共にスクイズ板(12)
(12)側からの圧縮空気の噴出によりマッチプレート
(2)の方向へ強制的に移動されて深い島部等があって
も十分な砂充填が行なわれる。また吹き込まれた圧縮空
気は各ベントホール(1)(1)(5)(5)から外部
に排出される。
At this time, the casting sand (S) blown is brought into a fluidized state by a blowing action from below and the squeeze plate (12)
(12) The compressed air is blown out from the side to forcibly move in the direction of the match plate (2), so that sufficient sand filling is performed even if there are deep islands. The blown compressed air is discharged from each vent hole (1) (1) (5) (5) to the outside.

このようにして砂充填が完了すると切替弁(7)によ
り配管(9)がカット状態にされると共に切替弁(15)
及び減圧弁(16)が操作されて前記噴出孔(14)からの
圧縮空気の圧力よりも高い圧力の圧縮空気が中空室(1
3)(13)に送られ、噴出孔(14)(14)を介して圧縮
空気が鋳枠(4)(4)内に所定時間供給されて鋳物砂
間を貫流してベントホール(1)(1)(5)(5)か
ら排気され、鋳物砂(S)(特にマッチプレート(2)
近辺の鋳物砂)を予備圧縮して鋳型キャビライーとなる
部分の型硬度を高める。
When the sand filling is completed in this way, the pipe (9) is cut by the switching valve (7) and the switching valve (15)
And the pressure reducing valve (16) is operated to supply compressed air having a pressure higher than the pressure of the compressed air from the ejection hole (14) to the hollow chamber (1).
3) sent to (13), compressed air is supplied into the casting flasks (4) and (4) for a predetermined time through the ejection holes (14) and (14), and flows through the molding sand to vent holes (1). (1) (5) Exhausted from (5), foundry sand (S) (particularly match plate (2)
The nearby molding sand is pre-compressed to increase the mold hardness of the portion that becomes the mold cavity.

このようにして鋳物砂(S)の予備圧縮が終るとシリ
ンダ(11)(11)が伸長作動してスクイズ板(12)(1
2)が充填、予備圧縮された鋳物砂(S)をマッチプレ
ート(2)とにより圧縮せしめて鋳型全体の強度を高め
鋳型を造型する。
When the pre-compression of the molding sand (S) is completed in this way, the cylinders (11) and (11) extend and the squeeze plates (12) (1)
The molding sand (S) filled and pre-compressed in 2) is compressed by the match plate (2) to increase the strength of the entire mold and mold the mold.

その後シリンダ(11)(11)が逆作動してスクイズ板
(12)(12)を鋳枠(4)(4)の外方に退避させかつ
図示されないシリンダが逆作動してブローヘッド(18)
を上昇させ、両鋳枠(4)(4)及びマッチプレート
(2)をそのまま90度反転し、両鋳枠(4)(4)を上
下に開いてマッチプレート(2)との型抜きを行ないマ
ッチプレート(2)を除去して両鋳枠(4)(4)が枠
合せされ、図示されない抜枠プレートにより鋳型を抜枠
する。
Thereafter, the cylinders (11) and (11) are operated in reverse to retract the squeeze plates (12) and (12) out of the flasks (4) and (4), and the cylinder (not shown) is operated in reverse to operate the blow head (18).
Is raised, the casting flasks (4) and (4) and the match plate (2) are turned 90 degrees as they are, and the casting flasks (4) and (4) are opened up and down to remove the mold from the match plate (2). The match plate (2) is removed, the two casting frames (4) and (4) are framed, and the mold is blanked by a blanking plate (not shown).

以後鋳枠(4)(4)及びマッチプレート(2)等が
次の鋳型造型に必要な作動を行ない、くりかえし鋳型を
造型してゆくのである。
Thereafter, the casting frames (4), (4), the match plate (2), etc. perform the operations necessary for the next mold making, and the molds are repeatedly formed.

(効果) 本発明は上記の説明から明らかなように、鋳物砂の吹
込みに際して鋳枠下壁部からの圧縮空気の吹き上げ及び
スクイズ板側からマッチプレート側に向けての減圧圧縮
空気の噴出により鋳物砂を流動化状態にして横移動させ
鋳物砂のマッチプレート近辺の充填度を高め、さらにス
クイズ板側からマッチプレート側に向けて高圧圧縮空気
の通気貫流により鋳物砂を予備圧縮してマッチプレート
近辺の鋳物砂の硬度を高めた上で、スクイズ板により鋳
物砂全体を圧縮して鋳型としての全体強度を得ることが
でき、鋳物砂の充填及び圧縮の両面においてすぐれた作
用効果が得られ複雑な鋳型形状のものでも造型形状にな
る。
(Effects) As is clear from the above description, the present invention is characterized in that, when casting sand is blown, the compressed air is blown up from the lower wall of the casting flask and the compressed air is blown out from the squeeze plate side toward the match plate side. The molding sand is fluidized and moved laterally to increase the degree of filling of the molding sand near the match plate.Furthermore, the molding sand is pre-compressed by the flow of high-pressure compressed air from the squeeze plate side to the match plate side to match plate. After increasing the hardness of the molding sand in the vicinity, the entire molding sand can be compressed by the squeeze plate to obtain the overall strength as a mold, and excellent operational effects can be obtained on both the filling and compression of the molding sand, resulting in complicated Even a mold having a simple mold shape can be shaped.

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

第1図は本発明を実施するための装置を示す縦断正面図
である。 (2):マッチプレート、(4):鋳枠 (10):エヤー吹き上げ孔、(12):スクイズ板 (14):圧縮空気噴出孔、(18):ブローヘッド
FIG. 1 is a longitudinal sectional front view showing an apparatus for carrying out the present invention. (2): Match plate, (4): Cast flask (10): Air blow-up hole, (12): Squeeze plate (14): Compressed air jet hole, (18): Blow head

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】垂直状態に配置されたマッチプレートの両
側部に、その上壁部に砂充填口を穿った鋳枠をそれぞれ
枠合せすると共に該鋳枠の外側開口にそれぞれスクイズ
板を嵌入して密閉し、該砂充填口から鋳物砂を該鋳枠内
に圧縮空気と共に吸込み充填し、該吹込み充填された鋳
物砂を前記スクイズ板により圧縮して鋳型を造型する方
法であって、前記鋳物砂を圧縮空気と共に吸込み充填す
る際に前記鋳枠の下壁部から上方に向けると共にスクイ
ズ板側からマッチプレート方向に向けてそれぞれ減圧さ
れたエヤーを供給して鋳物砂を流動化させながらマッチ
プレートに向って移動充填させ、その後スクイズ板から
マッチプレートに向けて圧縮空気を供給して鋳枠の壁部
及び/又はマッチプレートから排気してマッチプレート
近辺の鋳物砂を予備圧縮し、その後にスクイズ板による
鋳物砂圧縮を行なうことを特徴とする鋳型造型方法。
1. A casting frame having a sand filling port formed on an upper wall thereof is fitted to both sides of a vertically arranged match plate, and a squeeze plate is fitted into an outer opening of the casting frame. And sealing the casting sand from the sand filling port with the compressed air into the casting flask together with compressed air, and compressing the blown-filled molding sand with the squeeze plate to form a mold. When the molding sand is sucked and filled together with the compressed air, the molding sand is directed upward from the lower wall portion, and air is supplied from the squeeze plate side toward the match plate toward the match plate to supply the molding sand while fluidizing the molding sand. The squeeze plate supplies compressed air to the match plate and exhausts it from the wall of the flask and / or the match plate to prepare molding sand near the match plate. Casting mold making method characterized by performing compressed, then the foundry sand compressed by squeezing plate.
JP33858690A 1990-11-30 1990-11-30 Mold making method Expired - Fee Related JP2772869B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33858690A JP2772869B2 (en) 1990-11-30 1990-11-30 Mold making method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33858690A JP2772869B2 (en) 1990-11-30 1990-11-30 Mold making method

Publications (2)

Publication Number Publication Date
JPH04200956A JPH04200956A (en) 1992-07-21
JP2772869B2 true JP2772869B2 (en) 1998-07-09

Family

ID=18319569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33858690A Expired - Fee Related JP2772869B2 (en) 1990-11-30 1990-11-30 Mold making method

Country Status (1)

Country Link
JP (1) JP2772869B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6685332B2 (en) 2015-06-12 2020-04-22 ディサ・インダストリーズ・アクティーゼルスカブDISA Industries A/S Sand mold making machine and mold manufacturing method

Also Published As

Publication number Publication date
JPH04200956A (en) 1992-07-21

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