JPH05237594A - Manufacture of core - Google Patents
Manufacture of coreInfo
- Publication number
- JPH05237594A JPH05237594A JP3127284A JP12728491A JPH05237594A JP H05237594 A JPH05237594 A JP H05237594A JP 3127284 A JP3127284 A JP 3127284A JP 12728491 A JP12728491 A JP 12728491A JP H05237594 A JPH05237594 A JP H05237594A
- Authority
- JP
- Japan
- Prior art keywords
- core
- model
- sand
- molding sand
- self
- 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.)
- Granted
Links
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋳物製品の中空部を形
成する中子の製作方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a core for forming a hollow portion of a casting product.
【０００２】[0002]
【従来の技術】中子とは、鋳物製品の中空部の形状を形
成するものを言い、一般には、砂型で作るものが殆んど
である。この中子形状は、使用される鋳物製品によって
千差万別である。従来技術における中子製作方法とし
て、手込め造型方法、機械（ジョルトマシン、二次元振
動造型機）による造型方法、さらには空気を利用した鋳
物砂充填方法（ブローイング方式）等が実用されてい
る。2. Description of the Related Art The term "core" refers to a core which forms the shape of the hollow portion of a cast product, and in general, most of the cores are sand molds. This core shape varies widely depending on the casting product used. As a core manufacturing method in the prior art, a hand-filled molding method, a molding method using a machine (jolt machine, two-dimensional vibration molding machine), and a molding sand filling method (blowing method) using air are put into practical use.
【０００３】空気を利用した鋳物砂充填方法は、比較的
中、小物で、量産物を対象とした中子造型方法として、
量産鋳物工場で多用されている方法である。本発明が対
象とする自硬性鋳物砂を中子に用いる多種少量品の分野
では、手込め造型単独または機械（ジョルトマシン、二
次元振動造型機）造型と手作業の併用により中子を製作
するのが一般的である。The molding sand filling method using air is a core molding method for relatively small and medium-sized products, and is intended for mass production.
This method is widely used in mass production foundries. In the field of various small-quantity products using self-hardening molding sand for the core of the present invention, the core is manufactured by hand-filling molding alone or by combined use of machine (jolt machine, two-dimensional vibration molding machine) molding and manual work. Is common.
【０００４】図６は手込め造型による中子製作を示すも
ので、１は中子用模型、２は自硬性鋳物砂、９は搗き棒
またはサンドランマーである。中子用模型１に自硬性鋳
物砂２を適当量投入し、搗き棒またはサンドランマー９
にて搗き固め、中子を製作した後、自硬化するまで放置
する。図７は、二次元振動造型機を用いた中子製作を示
すもので、１は中子用模型、２は自硬性鋳物砂、６′は
二次元振動造型機である。FIG. 6 shows core manufacturing by hand-casting molding, 1 is a core model, 2 is self-hardening molding sand, and 9 is a pick bar or sand rammer. Insert a suitable amount of self-hardening molding sand 2 into the core model 1 and use a picking rod or sand rammer 9
After stiffening and making a core, leave it until it self-hardens. FIG. 7 shows core manufacturing using a two-dimensional vibration molding machine. 1 is a core model, 2 is a self-hardening molding sand, and 6'is a two-dimensional vibration molding machine.
【０００５】二次元振動造型機６′上に、中子用模型１
を置き、その中子用模型１の中に自硬性鋳物砂２を適当
量投入し、二次元振動造型機６′を加振させ、自硬性鋳
物砂２の充填密度向上を図る。しかし、二次元振動造型
機６′の加振力のみでは、中子用模型の隅角部Ａ1 ，Ａ
2 ，Ａ3 ，Ａ4 ，Ａ5 ，Ａ6 等は、自硬性鋳物砂２の充
填が出来ない。そのため、中子用模型の隅角部Ａ1 ，Ａ
2 ，Ａ3 ，Ａ4 ，Ａ5 ，Ａ6 等は、搗き棒またはサンド
ランマー９による補助的な手込作業を必要としている。The core model 1 is placed on the two-dimensional vibration molding machine 6 '.
Then, an appropriate amount of the self-hardening molding sand 2 is put into the core model 1 and the two-dimensional vibration molding machine 6'is vibrated to improve the packing density of the self-hardening molding sand 2. However, with only the exciting force of the two-dimensional vibration molding machine 6 ', the corners A 1 , A of the core model are
2 , A 3 , A 4 , A 5 , A 6 etc. cannot be filled with the self-hardening molding sand 2. Therefore, the corners A 1 , A of the core model are
Is 2, A 3, A 4, A 5, A 6 , etc., are in need of auxiliary Tekomi work by per rod or sand rammer 9.
【０００６】中子製作後は、図６の手込め造型と同様
に、自硬性鋳物砂２が硬化するまで放置した後、中子用
模型１より中子を取り出す。After the core is manufactured, the core is taken out from the core model 1 after being left as it is until the self-hardening molding sand 2 is hardened, as in the case of the hand-filled molding shown in FIG.
【０００７】[0007]
【発明が解決しようとする課題】前述した従来の中子製
作方法には次のような問題点がある。複雑な形状の中子
を造型する場合、中子の形状を確実に具現し、かつ、所
要の中子密度を得るために、手作業による中子の搗き固
めが必要である。そのため、手作業による中子の搗き固
めが困難な複雑形状の中子用模型の場合は、中子を分割
型としている。それゆえに、中子製作が完了した後分割
中子の組立て工数の増加、中子寸法精度の低下、鋳造し
た鋳物にバリが発生する等の不具合を生じている。The above-mentioned conventional core manufacturing method has the following problems. When molding a core having a complicated shape, it is necessary to manually compact the core in order to surely realize the shape of the core and to obtain the required core density. Therefore, in the case of a core model having a complicated shape in which it is difficult to compact the core manually, the core is divided. Therefore, after the core manufacturing is completed, the number of steps for assembling the split core increases, the core dimensional accuracy decreases, and burrs are generated in the cast product.
【０００８】また、中子製作が完了した後、自硬性鋳物
砂が中子用模型内で硬化するまで、一定時間放置する工
程が必要である。そのため中子造型時間の増加、硬化後
の中子抜型時間の変動、（周囲条件によって変化する）
抜型時または抜型後の中子の変形等の不具合がある。本
発明は、このような中子の造型性、中子及び鋳物の品質
上の不具合を解決した中子製作方法を提供することを目
的とするものである。Further, after the core production is completed, a step of leaving for a certain period of time is required until the self-hardening molding sand is hardened in the core model. Therefore, increase of core molding time, fluctuation of core removal time after hardening, (varies depending on ambient conditions)
There is a problem such as deformation of the core during or after the die removal. It is an object of the present invention to provide a core manufacturing method which solves the above-mentioned problems in moldability of the core, quality of the core and casting.
【０００９】[0009]
【課題を解決するための手段】中子用模型に三次元振動
を与える三次元振動造型機を設置し、自硬性鋳物砂を中
子用模型に投入する際、又は投入した後で、中子用模型
に三次元振動を与える。中子用模型に吸引流気装置を設
置し、模型内に鋳物砂を充填した後で、模型内部（鋳物
砂）に吸引流気する。[Means for Solving the Problem] A three-dimensional vibration molding machine that gives three-dimensional vibration to a core model is installed, and when the self-hardening molding sand is charged into the core model or after being charged, Apply three-dimensional vibration to the model. A suction airflow device is installed in the core model, and after the molding sand is filled in the model, suction airflow is performed inside the model (casting sand).
【００１０】[0010]
【作用】中子用模型に自硬性鋳物砂を投入する際、、又
は投入した後で、模型に三次元振動を与えることによ
り、鋳物砂が模型の隅々まで流れ込み緻密な充填が行な
われる。充填された鋳物砂を吸引流気することにより、
鋳物砂に含まれた水分及び粘結剤の化学反応により発生
する水分が除去され、硬化が促進される。Function When the self-hardening molding sand is charged into the core model or after it is charged, three-dimensional vibration is applied to the model so that the molding sand flows into every corner of the model for dense packing. By sucking and flowing the filled molding sand,
The moisture contained in the foundry sand and the moisture generated by the chemical reaction of the binder are removed, and the hardening is accelerated.
【００１１】[0011]
【実施例】図１に示した第１実施例において、三次元振
動造型機６の振動テーブル上に、中子硬化用吸引流気ボ
ックス３または吸引流気手段を設けた中子用模型１を設
置する。別の場所で混練した自硬性鋳物砂２を中子用模
型１内に適当量（例えば、全砂量の１／２）添加した
後、三次元振動造型機６を作動し、Ｘ軸、Ｙ軸及びＺ軸
の三方向の振動を与え、自硬性鋳物砂２を中子用模型内
に充填する。三次元振動造型機６を停止し、次に適当量
（例えば、全砂量の１／４）を中子用模型１内に投入
し、三次元振動造型機６を作動させる。更に残量分（例
えば１／４）の自硬性鋳物砂２を中子用模型１内に投入
し、再度振動充填を行なう。EXAMPLE In the first example shown in FIG. 1, a core hardening model 1 having a core hardening suction air flow box 3 or suction air flow means provided on a vibration table of a three-dimensional vibration molding machine 6. Install. After adding an appropriate amount (for example, 1/2 of the total amount of sand) of the self-hardening molding sand 2 kneaded at another place into the core model 1, the three-dimensional vibration molding machine 6 is operated and the X axis, Y Vibration in three directions of the axis and the Z axis is applied to fill the self-hardening molding sand 2 into the core model. The three-dimensional vibration molding machine 6 is stopped, and then an appropriate amount (for example, 1/4 of the total amount of sand) is put into the core model 1 to operate the three-dimensional vibration molding machine 6. Further, the remaining amount (for example, 1/4) of the self-hardening molding sand 2 is put into the core model 1 and the vibration filling is performed again.
【００１２】中子造型が完了後、直ちに吸引流気装置８
を数分間作動させ、吸引パイプ７及び吸引流気ボックス
３を介して中子を吸引流気し、自硬性鋳物砂２の水分な
らびに粘結剤が化学反応時に発生する水分を脱水除去
し、硬化を促進する。次に、本実施例の具体的作業につ
いて説明する。三次元振動造型機６のＸ，Ｙ，Ｚ軸の加
振力（周波数）を各５０ヘルツに設定し、中子重量３０
ｋｇの中子用模型１を振動テーブル上に設置し、フラン
鋳物砂２を中子用模型１内に全砂量の１／２を投入し、
１０秒間振動を与えた。次いで、フラン鋳物砂２の全砂
量の１／４を中子用模型１内に投入し、２０秒間振動、
更に全砂量の１／４強のフラン鋳物砂２を中子用模型１
内に投入し、３０秒間振動した。中子用模型完了後、吸
引流気装置８を作動し（５分間）中子を吸引流気硬化さ
せた。Immediately after the core molding is completed, the suction airflow device 8
Is operated for several minutes, the core is suctioned and flowed through the suction pipe 7 and the suction airflow box 3, and the moisture of the self-hardening molding sand 2 and the moisture generated during the chemical reaction of the binder are dehydrated and cured. Promote. Next, the specific work of this embodiment will be described. The exciting force (frequency) of the X-, Y-, and Z-axes of the three-dimensional vibration molding machine 6 is set to 50 hertz, and the core weight 30
The core model 1 for kg of core is set on the vibration table, and the furan casting sand 2 is put into the model for core 1 of 1/2 of the total amount of sand.
Shake for 10 seconds. Next, 1/4 of the total amount of the Furan molding sand 2 is put into the core model 1 and vibrated for 20 seconds.
In addition, 1/4 of the total amount of sand is used for the furan casting sand 2 for the core model 1
It was thrown in and vibrated for 30 seconds. After completion of the core model, the suction airflow device 8 was operated (5 minutes) to cure the core by suction airflow.
【００１３】抜型した中子は、約１００ｍｍの凸起巾木
でも完全に充填されており、また中心部まで均一に硬化
した良好な中子が得られた。表１にフラン自硬性砂の吸
引流気硬化特性を示す。The punched-out core was completely filled with a raised skirting board of about 100 mm, and a good core was obtained in which the core was uniformly hardened. Table 1 shows the suction air flow hardening characteristics of furan self-hardening sand.
【００１４】[0014]
【表１】 注）供試砂：掛津浮選５号 気 温：２８℃ 湿 度：９０％ＲＨ 硬化の挙動：深部まで均一硬化 図２に第２実施例を示す。[Table 1] Note) Test sand: Kaketsu Flotation No. 5 Air temperature: 28 ° C Humidity: 90% RH Curing behavior: Uniform hardening to deep part Figure 2 shows the second embodiment.
【００１５】中子用模型１の凹部で、自硬性鋳物砂２を
充填できないＡ1 ，Ａ2 ，……Ａ6部に、吸引流気用通
気孔４を設けた中子用模型１を三次元振動造型機６上に
設置し、吸引流気装置８を作動させながら、フラン鋳物
砂２を中子用模型１内に投入し、かつ、併行して三次元
振動造型機６を約６０秒振動させ、中子を製作した。そ
の後、第１実施例と同様に吸引流気硬化を実施した結
果、良好な中子が得られた。[0015] In the recess of the core for model 1, A 1, A 2, which can not be filled with self-hardening casting sand 2, the ...... A 6 parts of tertiary suction airflow core for model 1 provided with the air vents 4 It is installed on the original vibration molding machine 6, and while operating the suction air flow device 8, the furan molding sand 2 is put into the core model 1, and the three-dimensional vibration molding machine 6 is run in parallel for about 60 seconds. It was vibrated and a core was produced. After that, as a result of carrying out suction air flow curing in the same manner as in Example 1, a good core was obtained.
【００１６】図３に第３実施例を示す。中子用模型１の
凹部Ａ1 ，Ａ2 ，Ａ4 及びＡ5 に１５ｍｍ口の砂補充用
穴５を設けた中子用模型１を、三次元振動造型機６上に
設置した後、中子用模型１内へ全砂量の１／２のフラン
鋳物砂２を投入し、約２０秒振動した。次いで、三次元
振動造型機６を振動させながら、中子用模型１の上部及
び砂補充用穴５からフラン鋳物砂を補充投入し、約４０
秒間振動した。FIG. 3 shows a third embodiment. After installing the core model 1 having the 15 mm sand replenishment holes 5 in the recesses A 1 , A 2 , A 4 and A 5 of the core model 1 on the three-dimensional vibration molding machine 6, Fran molding sand 2 of 1/2 the total amount of sand was put into the child model 1 and vibrated for about 20 seconds. Then, while vibrating the three-dimensional vibration molding machine 6, the furan molding sand is replenished and charged through the upper portion of the core model 1 and the sand replenishment hole 5, and about 40
Vibrated for a second.
【００１７】中子造型完了後、吸引流気装置８を作動
し、吸引流気硬化を促進した結果、良好な中子が得られ
た図４に中子用模型の上部から吸引流気して硬化させる
第４実施例を示す。三次元振動造型機６の振動テーブル
上に、吸引流気用通気孔４及び砂補充用穴５（中子の形
状によっては省略）を設けた中子用模型１を設置する。
別の場所で混練した自硬性鋳物砂２を中子用模型１内に
適当量あて分割投入しながら三次元振動造型機６を加振
させ中子を造型する。中子造型完了後、図示しない吸引
流気装置を数分間作動させ、中子用模型１の上部に設け
た吸引パイプ７を介して中子を吸引流気し、自硬性鋳物
砂２の水分ならびに化学反応時に発生する水分を脱水除
去し、硬化を促進した結果、従来の自硬化方法に比して
中子の抜型時間が半減でき、かつ中子の深部までの均一
硬化が実現した。なお、図４において、１０はクランプ
である。After the core molding is completed, the suction airflow device 8 is operated to accelerate the hardening of the suction airflow. As a result, a good core is obtained. The 4th example which hardens is shown. On the vibration table of the three-dimensional vibration molding machine 6, the core model 1 provided with the suction airflow ventilation hole 4 and the sand replenishment hole 5 (omitted depending on the shape of the core) is installed.
While the self-hardening molding sand 2 kneaded at another place is applied to the core model 1 in an appropriate amount, the three-dimensional vibration molding machine 6 is vibrated to mold the core. After the core molding is completed, a suction air-flowing device (not shown) is operated for several minutes to suck and flow the core through the suction pipe 7 provided on the upper part of the core model 1 to remove the water content of the self-hardening molding sand 2. As a result of dehydration and removal of water generated during the chemical reaction to accelerate curing, the mold release time of the core was halved compared to the conventional self-curing method, and uniform curing to the deep part of the core was realized. In FIG. 4, 10 is a clamp.
【００１８】図５に中子用模型の側面から吸引流気して
硬化させる第５実施例を示す。自硬性鋳物砂２の添加方
法及び加振要領は第４実施例と同様である。吸引流気は
中子用模型１の側面部から行ったが、抜型時間及び硬化
状態は第４実施例と同様な良好な結果が得られた。FIG. 5 shows a fifth embodiment in which air is suctioned and flowed from the side surface of the core model to cure the core model. The method of adding the self-hardening molding sand 2 and the vibrating procedure are the same as in the fourth embodiment. The suction airflow was performed from the side surface portion of the core model 1, and the same good results as in the fourth example were obtained with respect to the die release time and the curing state.
【００１９】[0019]
【発明の効果】本発明による中子製作方法は、中子用模
型の内部を吸引流気する手段と、中子用模型に三次元振
動を与える手段とを具え、前記模型に三次元振動を与え
ながら自硬性鋳物砂を投入し、前記模型内部を鋳物砂で
充填した後で、前記模型内部を吸引流気することによ
り、次の効果を有する。 （１）中子造型時間を従来方法の１／３〜１／５に短縮
できる。 （２）手込めによる中子の搗き固め作業を完全に廃止で
きる。 （３）中子の１体造型の適用可能範囲が著しく拡大され
る。そのため、中子の組合せ及び寸法チェック作業が不
要となる。 （４）中子の１体化により鋳物のバリが無くなり、鋳物
仕上げ時間を大巾に短縮できる。 （５）中子の硬化時間が１／２に減少し、中子の生産性
が向上する。 （６）中子の硬化が均一で、かつ良好であるため、中子
の精度が向上し、鋳物の寸法精度が向上する。また仕上
代の減小も可能となる。The core manufacturing method according to the present invention comprises means for sucking and flowing the inside of the core model and means for applying three-dimensional vibration to the core model, and applying three-dimensional vibration to the model. The following effects are obtained by introducing self-hardening molding sand while giving it, filling the inside of the model with the molding sand, and then sucking and flowing the inside of the model. (1) The core molding time can be shortened to 1/3 to 1/5 of the conventional method. (2) It is possible to completely abolish the work of compacting the core by hand. (3) The applicable range of the one-body molding of the core is significantly expanded. Therefore, it is not necessary to combine cores and check the dimensions. (4) The burr of the casting is eliminated by unifying the core, and the casting finishing time can be greatly shortened. (5) The core curing time is reduced to 1/2, and the core productivity is improved. (6) Since the hardening of the core is uniform and good, the accuracy of the core is improved and the dimensional accuracy of the casting is improved. Also, the finishing cost can be reduced.
【図１】本発明の第１実施例に係る装置の縦断面図であ
る。FIG. 1 is a vertical sectional view of an apparatus according to a first embodiment of the present invention.
【図２】本発明の第２実施例に係る装置の縦断面図であ
る。FIG. 2 is a vertical sectional view of an apparatus according to a second embodiment of the present invention.
【図３】本発明の第３実施例に係る装置の縦断面図であ
る。FIG. 3 is a vertical sectional view of an apparatus according to a third embodiment of the present invention.
【図４】本発明の第４実施例に係る装置の縦断面図であ
る。FIG. 4 is a vertical sectional view of an apparatus according to a fourth embodiment of the present invention.
【図５】本発明の第５実施例に係る装置の縦断面図であ
る。FIG. 5 is a vertical sectional view of an apparatus according to a fifth embodiment of the present invention.
【図６】従来の中子製作方法を示す縦断面図である。FIG. 6 is a vertical sectional view showing a conventional core manufacturing method.
【図７】他の従来の中子製作方法を示す縦断面図であ
る。FIG. 7 is a vertical cross-sectional view showing another conventional core manufacturing method.
１ 中子用模型 ２ 自硬性鋳物砂 ３ 吸引流気ボックス ６ 三次元振動造型機 ７ 吸引パイプ ８ 吸引流気装置 1 Core model 2 Self-hardening casting sand 3 Suction air flow box 6 Three-dimensional vibration molding machine 7 Suction pipe 8 Suction air flow device
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【手続補正書】[Procedure amendment]
【提出日】平成３年６月２６日[Submission date] June 26, 1991
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】請求項１[Name of item to be corrected] Claim 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大畠 正昭 広島県三原市糸崎町5007番地 三菱重工業 株式会社三原製作所内 (72)発明者 永井 清隆 広島県三原市糸崎町5007番地 三菱重工業 株式会社三原製作所内 (72)発明者 輿石 邦夫 東京都中央区日本橋茅場町一丁目14番10号 花王クエーカー株式会社内 (72)発明者 平馬 康良 東京都中央区日本橋茅場町一丁目14番10号 花王クエーカー株式会社内 (72)発明者 小川 恭三郎 東京都中央区日本橋茅場町一丁目14番10号 花王クエーカー株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaaki Ohata 5007 Itozaki-cho, Mihara-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Mihara Works (72) Inventor Kiyotaka Nagai 5007 Itozaki-cho, Mihara-shi, Hiroshima Mitsubishi Heavy Industries Mihara Works (72) Inventor Kunio Koshiishi 1-14-10 Nihonbashi Kayabacho, Chuo-ku, Tokyo Kao Quaker Co., Ltd. (72) Inventor Yasuyoshi Hirama 1-14-10 Nihonbashi Kayabacho, Chuo-ku, Tokyo Kao Quaker Co., Ltd. (72) Inventor Kyozaburo Ogawa 1-14-10 Niyabashi-Kayabacho, Chuo-ku, Tokyo Kao Quaker Co., Ltd.
Claims (7)
と、中子用模型に三次元振動を与える手段とを具え、前
記模型に三次元振動を与えながら自硬性鋳物砂を投入
し、前記模型内部を鋳物砂で充填した後で、前記模型内
部を吸引流気することを特徴とする中子製作方法。1. A means for sucking and flowing air from the bottom of the core model, and means for imparting three-dimensional vibration to the core model, wherein self-hardening molding sand is introduced while applying three-dimensional vibration to the model. A core manufacturing method characterized in that the inside of the model is suctioned and aired after the inside of the model is filled with molding sand.
連通した小孔を設け、同隅部に対する鋳物砂の充填を容
易にした請求項１記載の中子製作方法。2. The core manufacturing method according to claim 1, wherein a small hole communicating with the suction airflow means is provided at a corner of the core model to facilitate filling of the molding sand with the molding sand.
に砂補充用穴を設け、同凹部に対する鋳物砂の充填を可
能にした請求項１記載の中子製作方法。3. The core manufacturing method according to claim 1, wherein a sand replenishing hole is provided in a recess of the core model where it is difficult to fill the molding sand, and the molding sand can be filled into the recess.
硬性鋳物砂を投入し、前記模型内部を鋳物砂で充填する
ことを特徴とする中子製作方法。4. A method for manufacturing a core, wherein self-hardening molding sand is charged into the model for core while applying three-dimensional vibration, and the inside of the model is filled with the molding sand.
連通した小孔を設け、同隅部に対する鋳物砂の充填を容
易にした請求項４記載の中子製作方法。5. The core manufacturing method according to claim 4, wherein a small hole communicating with the suction airflow means is provided in a corner of the core model to facilitate filling of the molding sand with the molding sand.
に砂補充用穴を設け、同凹部に対する鋳物砂の充填を可
能にした請求項４記載の中子製作方法。6. The core manufacturing method according to claim 4, wherein a sand replenishing hole is provided in a concave portion of the core model where it is difficult to fill the molding sand, and the molding sand can be filled into the concave portion.
け、前記模型内部を鋳物砂で充填した後で、前記模型内
部を吸引流気することを特徴とする中子製作方法。7. A method of manufacturing a core, wherein a means for sucking and flowing the inside of the model for a core is provided, and after filling the inside of the model with molding sand, the inside of the model is sucked and flowing.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1991626193 DE69126193T2 (en) | 1990-11-14 | 1991-11-13 | Process for the production of cores and molds |
| EP19910310485 EP0489509B1 (en) | 1990-11-14 | 1991-11-13 | Method of manufacturing core and mold |
| KR1019910020220A KR960002401B1 (en) | 1990-11-14 | 1991-11-14 | Method of manufacturing cord and mold |
| US08/209,674 US5388630A (en) | 1990-11-14 | 1994-03-10 | Method of manufacturing core and mold |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2-306168 | 1990-11-14 | ||
| JP30616890 | 1990-11-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05237594A true JPH05237594A (en) | 1993-09-17 |
| JP2659870B2 JP2659870B2 (en) | 1997-09-30 |
Family
ID=17953863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3127284A Expired - Fee Related JP2659870B2 (en) | 1990-11-14 | 1991-05-30 | Core production method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2659870B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014117738A (en) * | 2012-12-18 | 2014-06-30 | Ogasa Shell Seisakusho Kk | Mold for core formation and method of producing core for casting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56109138A (en) * | 1980-01-31 | 1981-08-29 | Daiwa Seisakusho:Kk | Molding method of mold |
| JPS5823245U (en) * | 1981-08-06 | 1983-02-14 | 新東工業株式会社 | two proportion model |
| JPS6113150U (en) * | 1984-06-28 | 1986-01-25 | 株式会社 土屋製作所 | Air fuel ratio control device |
-
1991
- 1991-05-30 JP JP3127284A patent/JP2659870B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56109138A (en) * | 1980-01-31 | 1981-08-29 | Daiwa Seisakusho:Kk | Molding method of mold |
| JPS5823245U (en) * | 1981-08-06 | 1983-02-14 | 新東工業株式会社 | two proportion model |
| JPS6113150U (en) * | 1984-06-28 | 1986-01-25 | 株式会社 土屋製作所 | Air fuel ratio control device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014117738A (en) * | 2012-12-18 | 2014-06-30 | Ogasa Shell Seisakusho Kk | Mold for core formation and method of producing core for casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2659870B2 (en) | 1997-09-30 |
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