JPH0221343B2 - - Google Patents

Info

Publication number
JPH0221343B2
JPH0221343B2 JP57001587A JP158782A JPH0221343B2 JP H0221343 B2 JPH0221343 B2 JP H0221343B2 JP 57001587 A JP57001587 A JP 57001587A JP 158782 A JP158782 A JP 158782A JP H0221343 B2 JPH0221343 B2 JP H0221343B2
Authority
JP
Japan
Prior art keywords
sand
cavity
hollow
opening
hollow mandrel
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 - Lifetime
Application number
JP57001587A
Other languages
Japanese (ja)
Other versions
JPS58119436A (en
Inventor
Nagato Unosaki
Kazuharu Matsui
Shigehiro Toyoda
Katsuro Hikita
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 JP57001587A priority Critical patent/JPS58119436A/en
Publication of JPS58119436A publication Critical patent/JPS58119436A/en
Publication of JPH0221343B2 publication Critical patent/JPH0221343B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/12Treating moulds or cores, e.g. drying, hardening
    • B22C9/123Gas-hardening

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)

Description

【発明の詳細な説明】 本発明は粘結剤を含有した鋳物砂を用いて中子
鋳型を製造するのに好適なガス硬化鋳型の造型方
法に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a gas-hardening mold suitable for manufacturing a core mold using molding sand containing a binder.

従来、模型箱内への鋳物砂の充填はブローイン
グ方式によつて行われているが、模型箱がブロー
イング圧力によつて開かれないようにするため
に、クランプ装置を必要とし、又模型箱自体もブ
ローイング圧力に耐え得るものでなければならな
いため、模型箱を木型で製作することに難点があ
つた。
Conventionally, molding sand has been filled into the model box by the blowing method, but in order to prevent the model box from being opened by blowing pressure, a clamping device is required, and the model box itself is Since the model box had to be able to withstand blowing pressure, it was difficult to make the model box using a wooden mold.

また、プラス圧の硬化ガスを模型箱内の鋳物砂
中に通気させるようにしていたため、模型箱の合
せ面等からガス漏れを起す心配があつた。
Furthermore, since the positive pressure curing gas was passed through the molding sand in the model box, there was a concern that gas would leak from the mating surfaces of the model box.

本発明はこれらの問題点に鑑みて成されたもの
であつて、模型箱のクランプ装置を必要とせず、
しかも木型の模型箱でも充分使用でき、またガス
漏れの心配のないガス硬化鋳型の造型方法を提供
することを目的とするものである。
The present invention has been made in view of these problems, and does not require a clamping device for the model box.
Moreover, it is an object of the present invention to provide a method for making a gas-hardening mold that can be used even with a wooden model box and is free from the risk of gas leakage.

以下に、本発明の構成を実施例に基づき説明す
る。1は木型等の強度の弱い材質から成る左型2
と右型3を型合せしてなる割り型模型箱で、この
模型箱1の型合せ面には、上部に砂供給口4aを
備えたキヤビテイ部4が形成されている。左型2
及び右型3の側部には、それぞれ中空室5が形成
してあるとともに、キヤビテイ部4の表面には該
中空室5に連通して通気孔6が多数個穿設されて
いる。また、各中空室5の外壁面には、それぞれ
吸気口7が設けられ、各吸気口7には導管8、主
配管9及び開閉弁10を介して減圧装置11が連
通接続されていて、減圧装置11を作動し開閉弁
10を開くと、キヤビテイ部4は主配管9、導管
8、吸気口7、中空室5及び通気孔6を介して負
圧作用が及ぼされるようになつている。12は筒
体12aと、この筒体12aの中央部下方に突設
し上部を開口とした中空部12b′を内部に備えた
中空マンドレル12bと、から成る模型体で、該
中空マンドレル12bは筒体12a内に水平放射
状に配設された図示されないリムによつて上部位
置を支持されるとともに、筒体12aと中空マン
ドレル12bとの間の空間部には、前記リムによ
つて扇型状に区画された砂吹込み口12cとなる
開口部が形成されている。また、中空マンドレル
12bの表面には中空部12b′に連通して通気孔
12dが複数個穿設されている。前記模型体12
は砂吹込み口12cを砂供給口4aに位置させる
とともに、中空マンドレル12bをキヤビテイ部
4の略中央部に挿入して載置されていて、キヤビ
テイ面と中空マンドレル12bの間に形成された
空間部には、鋳物砂13が充填されている。
The configuration of the present invention will be explained below based on examples. 1 is a left mold 2 made of a weak material such as a wooden mold
A split model box is formed by mold-matching a right mold 3 and a mold-matching surface of the model box 1. A cavity portion 4 having a sand supply port 4a in the upper part is formed on the mold-matching surface of the model box 1. Left type 2
A hollow chamber 5 is formed in each side of the right mold 3, and a large number of ventilation holes 6 are formed in the surface of the cavity 4 so as to communicate with the hollow chamber 5. Further, an intake port 7 is provided on the outer wall surface of each hollow chamber 5, and a pressure reducing device 11 is connected to each intake port 7 via a conduit 8, a main pipe 9, and an on-off valve 10 to reduce the pressure. When the device 11 is operated and the on-off valve 10 is opened, a negative pressure is applied to the cavity portion 4 through the main pipe 9, the conduit 8, the intake port 7, the hollow chamber 5, and the vent hole 6. Reference numeral 12 designates a model body consisting of a cylindrical body 12a and a hollow mandrel 12b provided inside with a hollow part 12b' that protrudes below the center of the cylindrical body 12a and is open at the top. The upper position is supported by rims (not shown) disposed horizontally and radially within the body 12a, and in the space between the cylindrical body 12a and the hollow mandrel 12b, a sector-shaped rim is formed by the rims. An opening serving as a partitioned sand blowing port 12c is formed. Further, a plurality of ventilation holes 12d are formed on the surface of the hollow mandrel 12b so as to communicate with the hollow portion 12b'. The model body 12
The sand blowing port 12c is located at the sand supply port 4a, and the hollow mandrel 12b is inserted and placed approximately in the center of the cavity portion 4, and a space is formed between the cavity surface and the hollow mandrel 12b. The portion is filled with foundry sand 13.

そして、模型体12の上面には、砂吹込み口1
2cに対応した位置に開口部14aを備えた蓋部
材14が該開口部14aを砂吹込み口12cに位
置するとともに、中空部12b′の上部開口部を覆
うようにして載置されている。さらに、その上面
には、下部開口部にスライドゲート15を備えた
ホツパ16が内部に鋳物砂13を貯留して載置さ
れている。該スライドゲート15の内部には、ス
ライド板15aが図示されない開閉シリンダの作
動により、摺動移動自在に設けられ、鋳物砂の供
給を遮断できるようになつている。
A sand blowing port 1 is provided on the top surface of the model body 12.
A lid member 14 having an opening 14a at a position corresponding to 2c is placed so that the opening 14a is located at the sand blowing port 12c and covers the upper opening of the hollow portion 12b'. Furthermore, a hopper 16 having a slide gate 15 at its lower opening is placed on the upper surface thereof, with molding sand 13 stored therein. A slide plate 15a is provided inside the slide gate 15 so as to be slidable by the operation of an opening/closing cylinder (not shown), so that the supply of molding sand can be shut off.

また、第2図に示す如く、蓋部材14及びスラ
イドゲート15付ホツパ16を除去したあとの模
型体12の上面には、中央部にガス供給孔17a
を備えたカバー部材17が該ガス供給孔17aを
中空部12b′の上部開口部に位置しかつ砂吹込み
口12cを覆うようにして載置されている。該ガ
ス供給孔17aは導管18、開閉弁19を介して
ガス発生装置20に連通接続されている。
Further, as shown in FIG. 2, after removing the lid member 14 and the hopper 16 with the slide gate 15, the upper surface of the model body 12 has a gas supply hole 17a in the center.
A cover member 17 having a gas supply hole 17a is placed at the upper opening of the hollow portion 12b' and covers the sand blowing port 12c. The gas supply hole 17a is connected to a gas generator 20 via a conduit 18 and an on-off valve 19.

このように構成されたものは、模型箱1の上面
に、模型体12がキヤビテイ部4内に中空マンド
レル12bを挿入しかつ砂吹込み口12cを砂供
給口4aに位置して載置してあるとともに、該模
型体12の上面には、蓋部材14が開口部14a
を砂吹込み口12cに位置され、さらに蓋部材1
4の上面には、スライドゲート15付ホツパ16
が載置された状態において、減圧装置11が作動
し開閉弁10を開くと、キヤビテイ部4内は、主
配管9、導管8、吸気口7、中空室5及び通気孔
6を介して負圧作用が及ぼされる。かゝる状態に
おいて図示されない開閉シリンダが作動しスライ
ド板15aを開くと、ホツパ16内の鋳物砂13
はスライドゲート15、蓋部材14及び模型体1
2の開口部を経てキヤビテイ面と中空マンドレル
12bとの間に形成された空間部に吸引充填され
る。次いで、減圧装置11の作動を停止し、蓋部
材14及びスライドゲート15付ホツパ16が取
除かれたあと、模型体12の上面には、カバー部
材17が中空部12b′の上部開口部に位置して載
置されるとともに、引続いて減圧装置11が作動
し開閉弁10を開くと、主配管9、導管8、吸気
口7、中空室5及び通気孔6を介してキヤビテイ
部4は負圧化される。この状態において、硬化ガ
ス用の開閉弁19を開くと、ガス発生装置20か
ら硬化ガスが導管18及びガス供給孔17aを経
て中空マンドレル12bの中空部12b′に吸引供
給され、さらに該硬化ガスは通気孔12dを介し
てキヤビテイ部4内の鋳物砂13中に通気され該
鋳物砂13を硬化する。一方、鋳物砂13中を通
過した硬化ガスは通気孔6、中空室5、吸気口
7、導管8、主配管9及び開閉弁10を経て減圧
装置11に付設された中和槽(図示せず)に導入
され中和された後、大気中に排気される。その
後、模型体12及びカバー部材17を除去し模型
箱1を型開きしてガス硬化鋳型を取出し、以後前
記操作を繰返す。
In this structure, the model body 12 is placed on the top surface of the model box 1 with the hollow mandrel 12b inserted into the cavity 4 and the sand blowing port 12c positioned at the sand supply port 4a. At the same time, on the upper surface of the model body 12, a lid member 14 is provided with an opening 14a.
is located at the sand blowing port 12c, and the lid member 1
4 has a hopper 16 with a slide gate 15 on the top surface.
When the pressure reducing device 11 operates and the on-off valve 10 is opened in the state in which the action is exerted. In such a state, when the opening/closing cylinder (not shown) operates and opens the slide plate 15a, the molding sand 13 in the hopper 16 is released.
The slide gate 15, the lid member 14, and the model body 1
The liquid is sucked and filled into the space formed between the cavity surface and the hollow mandrel 12b through the opening 2. Next, after the operation of the pressure reducing device 11 is stopped and the lid member 14 and the hopper 16 with the slide gate 15 are removed, the cover member 17 is positioned on the upper surface of the model body 12 at the upper opening of the hollow portion 12b'. When the pressure reducing device 11 is operated and the on-off valve 10 is opened, the cavity part 4 becomes negative through the main pipe 9, the conduit 8, the intake port 7, the hollow chamber 5, and the vent hole 6. be compressed. In this state, when the curing gas on-off valve 19 is opened, the curing gas is sucked and supplied from the gas generator 20 to the hollow part 12b' of the hollow mandrel 12b through the conduit 18 and the gas supply hole 17a, and the curing gas is The molding sand 13 in the cavity portion 4 is vented through the ventilation hole 12d to harden the molding sand 13. On the other hand, the hardening gas that has passed through the foundry sand 13 passes through the ventilation hole 6, the hollow chamber 5, the intake port 7, the conduit 8, the main piping 9, and the on-off valve 10, and then enters the neutralization tank (not shown) attached to the pressure reducing device 11. ), where it is neutralized and then exhausted to the atmosphere. Thereafter, the model body 12 and the cover member 17 are removed, the model box 1 is opened, the gas hardening mold is taken out, and the above operation is repeated thereafter.

尚、前記実施例においては、ホツパ16の下部
開口部をスライドゲート15によつて開閉するよ
うにしたが、スライドゲート14の替りに開閉弁
を使用するようにしてもよい。
In the above embodiment, the lower opening of the hopper 16 is opened and closed by the slide gate 15, but an on-off valve may be used instead of the slide gate 14.

また、前記実施例においては、蓋部材14をス
ライドゲート15付ホツパ16と別々の分離独立
した構成としたが、スライドゲート15の下面に
一体的に取付けるようにしてもよい。
Further, in the embodiment described above, the lid member 14 is configured to be separate and independent from the hopper 16 with the slide gate 15, but the lid member 14 may be attached integrally to the lower surface of the slide gate 15.

以上の説明によつて明らかなように、本発明に
よれば、吸引をかけながら鋳物砂の充填及び硬化
ガスのガツシングを行うようにしたため、割り型
模型箱のクランプ装置が不要となるとともに、硬
化ガスの漏れを防止することができ、さらには模
型箱の材質は木型等の強度の弱いものでも良いな
ど、いろいろな効果を有し、この種の業界に寄与
する効果は著大である。
As is clear from the above description, according to the present invention, filling with molding sand and gassing with hardening gas are performed while applying suction, which eliminates the need for a clamping device for the split model box, and It has various effects, such as being able to prevent gas leakage and allowing the model box to be made of weak materials such as wooden molds, making it a significant contribution to this type of industry.

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

第1図及び第2図は本発明の実施例を示す工程
説明図である。
FIG. 1 and FIG. 2 are process explanatory diagrams showing an embodiment of the present invention.

Claims (1)

【特許請求の範囲】[Claims] 1 吸引装置に連通する通気孔をキヤビテイ部の
表面に穿設されかつ上部に砂供給口を備えた模型
箱の上面に、周囲に砂吹込み口を設け、かつ上部
を開口とした中空部を内部に備えるとともに表面
に該中空部に通じる通気孔を複数個穿つた中空マ
ンドレルを下面中央部に垂設支持した模型体の前
記砂吹込み口を前記砂供給口に位置させて前記中
空マンドレルをキヤビテイ部に挿入するようにし
て載置する工程と、前記模型体の上面に、前記中
空マンドレルの上部開口部を蓋部材で覆つて、下
部開口部に開閉装置を備えたホツパを、前記砂供
給口及び砂吹込み口に連通して載置する工程と、
前記吸引装置の作動により、前記キヤビテイ面に
穿設された通気孔を介して該キヤビテイ部を負圧
化し、該キヤビテイ面と中空マンドレルによつて
画成された空間部に、前記開閉装置を開いて前記
ホツパ内に貯留されたガス硬化性の鋳物砂を吸
引、作用によつてのみ充填する工程と、前記吸引
装置の作動を停止し前記模型体の上面に載置され
た前記蓋部材及びホツパを除去して前記吹込み口
をカバー部材で覆つたあと、前記吸引装置を再び
作動し、前記キヤビテイ部を負圧化するととも
に、前記中空マンドレルの中空部に硬化ガス発生
装置を連通接続して該硬化ガス発生装置内の硬化
ガスを前記中空マンドレルの中空部に吸引、作用
によつてのみ導入し、該中空マンドレルの表面に
穿設された通気孔を介して前記空間部に充填され
た鋳物砂中に通気させて該鋳物砂を硬化すること
を特徴とするガス硬化鋳型の造型方法。
1. On the top surface of the model box, which has a ventilation hole communicating with the suction device on the surface of the cavity and a sand supply port at the top, a hollow part with a sand injection port around the periphery and an opening at the top is installed. A hollow mandrel, which is provided inside and has a plurality of ventilation holes on its surface that communicate with the hollow portion, is suspended and supported at the center of the lower surface, and the sand blowing port is positioned at the sand supply port, and the hollow mandrel is installed. A step of inserting and placing the model into the cavity, and covering the upper opening of the hollow mandrel with a lid member and installing a hopper having an opening/closing device in the lower opening on the upper surface of the model body for supplying the sand. a step of placing it in communication with the mouth and the sand blowing port;
By the operation of the suction device, negative pressure is created in the cavity through a vent hole formed in the cavity surface, and the opening/closing device is opened into a space defined by the cavity surface and the hollow mandrel. filling the hopper with gas-curable foundry sand stored in the hopper by suction, and stopping the operation of the suction device and removing the lid member and the hopper placed on the upper surface of the model body. is removed and the inlet port is covered with a cover member, the suction device is operated again to create a negative pressure in the cavity, and a curing gas generator is connected in communication with the hollow portion of the hollow mandrel. The curing gas in the curing gas generator is introduced into the hollow part of the hollow mandrel only by suction and action, and the casting is filled into the space through the vent hole bored on the surface of the hollow mandrel. A method for making a gas-hardened mold, characterized by hardening the foundry sand by passing air into the sand.
JP57001587A 1982-01-08 1982-01-08 Molding method of gas hardened casting mold Granted JPS58119436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57001587A JPS58119436A (en) 1982-01-08 1982-01-08 Molding method of gas hardened casting mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57001587A JPS58119436A (en) 1982-01-08 1982-01-08 Molding method of gas hardened casting mold

Publications (2)

Publication Number Publication Date
JPS58119436A JPS58119436A (en) 1983-07-15
JPH0221343B2 true JPH0221343B2 (en) 1990-05-14

Family

ID=11505641

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57001587A Granted JPS58119436A (en) 1982-01-08 1982-01-08 Molding method of gas hardened casting mold

Country Status (1)

Country Link
JP (1) JPS58119436A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105436423A (en) * 2015-11-29 2016-03-30 无锡市鑫茂锻造有限公司 Gradual type blowdown knockout head of casting mold
CN105382211A (en) * 2015-11-29 2016-03-09 无锡市鑫茂锻造有限公司 Blowing removal type casting mold shakeout head
CN105436428A (en) * 2015-11-29 2016-03-30 无锡市鑫茂锻造有限公司 Casting mold knockout head with spinning type ejector cores
CN105436424A (en) * 2015-11-29 2016-03-30 无锡市鑫茂锻造有限公司 Rotating blowing type knockout head of casting mold
CN105436433A (en) * 2015-11-29 2016-03-30 无锡市鑫茂锻造有限公司 Blowing knockout head of casting mold
CN105436427A (en) * 2015-11-29 2016-03-30 无锡市鑫茂锻造有限公司 Novel knockout head of casting mold
CN105436432A (en) * 2015-11-29 2016-03-30 无锡市鑫茂锻造有限公司 Casting mold knockout head with spinning blowing type ejector cores

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5725245A (en) * 1980-07-18 1982-02-10 Harada Chuzosho:Kk Method and device for core molding

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5725245A (en) * 1980-07-18 1982-02-10 Harada Chuzosho:Kk Method and device for core molding

Also Published As

Publication number Publication date
JPS58119436A (en) 1983-07-15

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