JPH0332444A - Method for molding mold utilizing micro wave heating - Google Patents
Method for molding mold utilizing micro wave heatingInfo
- Publication number
- JPH0332444A JPH0332444A JP16795689A JP16795689A JPH0332444A JP H0332444 A JPH0332444 A JP H0332444A JP 16795689 A JP16795689 A JP 16795689A JP 16795689 A JP16795689 A JP 16795689A JP H0332444 A JPH0332444 A JP H0332444A
- Authority
- JP
- Japan
- Prior art keywords
- sand
- pattern
- core
- microwave heating
- mold
- 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
- 238000010438 heat treatment Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000000465 moulding Methods 0.000 title claims description 12
- 239000004576 sand Substances 0.000 claims abstract description 48
- 239000011230 binding agent Substances 0.000 claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000011247 coating layer Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 2
- 239000003110 molding sand Substances 0.000 abstract description 4
- 230000006866 deterioration Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000001723 curing Methods 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
（Ｆｌｌ上上利用分野）
鋳型造型法に係り、特にはマイクロ波加熱により締型表
面に微細な塗型層を形成させることで、鋳肌粗さや寸法
精度の向上を可能とするマイクロ波加熱を利用した鋳型
造型法に関する。[Detailed description of the invention] (Field of application in FLL) This invention relates to a mold making method, and in particular improves casting surface roughness and dimensional accuracy by forming a fine coating layer on the surface of a clamping mold using microwave heating. This article relates to a mold making method that utilizes microwave heating.
（従来の技ｆｒ）
従来優れた訪肌粗さや、良好な寸法精度を要求される綽
造品にはロストワックス法、セラミックモールド法など
の精密祷造法が適用されているが、これらの錦造法はコ
ストが高く、生産性が悪いことから、マイクロ波加熱に
より鋳型表面に緻密な塗膜層を形成させ、精密祷造品に
近い鋳肌や寸法精度のものを低コストで実現可能なマイ
クロ波加熱を利用する鋳型造型法が使用されている。マ
イクロ波加熱を利用する鋳型造型法は１８４図に示すご
とく、スラリー状の塗型剤１０１４−模型１０２内に流
し込み模型内全面に塗型剤を付着させた後、塗型剤１０
１を反転排出させる０次に粘結剤をコーティングした中
子砂１０４で内部を充填した後、マイクロ波加熱により
塗型剤１０１および中子砂１０４を同時に硬化させるこ
とで、硬化後の中子１０７には横型内面の性状が正確に
転写された硬質の塗膜層１０５が形成される。塗型及び
中子砂用の粘結剤としては、無機系粘結剤か、有機系粘
結剤が使用される。(Conventional technique fr) Precision manufacturing methods such as the lost wax method and the ceramic mold method have been applied to brocade products that require excellent surface roughness and good dimensional accuracy. Since this manufacturing method is expensive and has low productivity, microwave heating is used to form a dense coating layer on the mold surface, making it possible to achieve casting surfaces and dimensional accuracy close to those of precision-made products at a low cost. A mold making method using microwave heating is used. As shown in Fig. 184, the mold making method using microwave heating is performed by pouring a slurry-like mold coating agent 1014 into a model 102 and depositing the mold coating agent on the entire surface of the model.
After filling the inside with core sand 104 coated with a binder, the mold coating agent 101 and core sand 104 are simultaneously cured by microwave heating to form a hardened core. A hard coating layer 105 is formed on 107 to which the properties of the horizontal inner surface are accurately transferred. As the binder for the mold and core sand, either an inorganic binder or an organic binder is used.
（発明が解決しようとする課題）
塗型及び鋳物砂（中子砂）に無機系粘結剤を使用して中
子を作る場合、マイクロ波によりよる加熱硬化させる過
程で、横型表面を傷めることは少ないが、この中子を騨
鋼のように高温状態で注入する綽物製作に使用すると、
中子が温度（８００℃以上）になるため、造型中に使用
されていた中子表面に付着している粘結剤が焼結されて
しまい、砂落としができなくなる。一方塗型及び鋳物砂
に有機系粘結剤を使用した中子では、高温状態で注入さ
れる祷物に対しては粘結剤が焼結される心配がなく砂落
としが良好に行なえるが、マイクロ波で塗型剤及び鋳物
砂を加熱硬化させる過程では、硬化温度が高くなるため
（２５０〜３００℃）中子を作るための模型表面が劣
化損傷される程度が早くなる欠点がある６本発明は上記
問題に着目し、塗型剤には無機系粘結剤を、鋳物砂には
有機系粘結剤を使用し、両者の間を−ａ求項（１）では
無機系粘結剤を使用した乾態婢物砂で、請求項（２）で
は、液状有機系樹脂で雑布することで、同者間に断熱層
を作り、有機系粘結剤から発生するアンモニヤガス等を
模型に当たらないようにしたマイクロ波加熱を利用した
鋳型造型法の提供を目的としている。(Problem to be solved by the invention) When making a core using an inorganic binder in the coating mold and foundry sand (core sand), the surface of the horizontal mold may be damaged during the heating and hardening process using microwaves. Although the amount is small, if this core is used in the production of greenware, which is injected at high temperatures like Dohagane,
Since the temperature of the core reaches 800° C. or higher, the binder used during molding that adheres to the surface of the core is sintered, making it impossible to remove sand. On the other hand, with cores that use organic binders in the coated mold and foundry sand, sand removal can be carried out well without the risk of the binder being sintered for prayers that are poured at high temperatures. In the process of heating and curing mold coating and foundry sand using microwaves, the curing temperature is high (250 to 300°C), which has the disadvantage that the surface of the model used to make the core deteriorates and is damaged more quickly6. The present invention focuses on the above problem, and uses an inorganic binder in the coating agent and an organic binder in the foundry sand. According to claim (2), by spreading a liquid organic resin, a heat insulating layer is created between the particles, and ammonia gas etc. generated from the organic binder are removed. The aim is to provide a mold making method that uses microwave heating to avoid contact with the model.
（課題を解枠するための手段）
上記目的を遠戚するため、請求項（１）あらかじめｍｓ
層を有する中子を模型内でマイクロ波加熱で硬化させる
鋳型造型法において、模型的全面を無機系粘結剤を使用
した塗型剤でコーティング後、無機系粘結剤を使用した
乾態中間砂を入れ反転排出し、有機系粘結剤を使用した
中子砂を充填する。(Means for solving the problem) In order to distantly relate to the above purpose, claim (1)
In the mold making method in which a core with layers is hardened by microwave heating inside a model, the entire surface of the model is coated with a coating agent using an inorganic binder, and then a dry intermediate layer is coated with a coating agent using an inorganic binder. Sand is put in, turned over and discharged, and then filled with core sand using an organic binder.
この状態でマイクロ波加熱により塗型剤および鋳物砂を
同時に硬化させることを特徴とするマイクロ波加熱を利
用した鋳型造型法、Ｉｌｌ求項（２）あらかじめ塗膜層
を有する中子を模型内でマイクロ波加熱で硬化させる鋳
型造型法において、模型的全面を無機系粘結剤を使用し
た塗型剤でコーティング乾燥後、その表面を液状有機系
樹脂で塗布した後、有機系粘結剤を使用した中子砂を充
填、この状態でマイクロ波加熱により塗型剤及び鋳物砂
を同時に硬化させることを特徴とするマイクロ波加熱を
利用した鋳型造型法とした。A mold making method using microwave heating characterized by curing the coating agent and molding sand simultaneously by microwave heating in this state, Ill. In the mold making method, which hardens using microwave heating, the entire surface of the model is coated with a coating agent that uses an inorganic binder. After drying, the surface is coated with a liquid organic resin, and then an organic binder is used. This is a mold making method using microwave heating, which is characterized in that the core sand is filled with molded core sand, and in this state, the coating agent and molding sand are simultaneously cured by microwave heating.
（作 用）
上記構成によれば、塗型剤及び中間の無機系粘結剤を使
用した乾態砂成るいは液状有機系樹脂は、マイクロ波加
熱時断熱層を形成して、有機系粘結剤を使用した鋳物砂
より発生するアンモニヤガス等が模型表面に当たらない
よう、フィルムのｆｉ能を発揮する。又有機系粘結剤を
使用した中子砂の発熱硬化の断熱層となり締型造型時の
横型の耐久性を向上させる線型の中が有機系粘結剤を使
用してむνるため祷込み後の砂落ち性が良くなる。(Function) According to the above structure, the dry sand or liquid organic resin using the coating agent and intermediate inorganic binder forms a heat insulating layer during microwave heating, and the organic binder forms a heat insulating layer during microwave heating. The fi-ability of the film is exerted to prevent ammonia gas generated from molding sand using a binder from hitting the model surface. Also, since the inside of the linear mold is made using an organic binder, it becomes an insulating layer for heat-curing core sand that uses an organic binder, and improves the durability of horizontal molds during clamp molding. Improves sand removal properties afterwards.
（実施Ｎ）
本発明にもとづくマイクロ波加熱を利用した紡型造型法
の実施例につき、図面で説明する。第１図は本発明実施
例にもとづく中子造型工程の概要説明図である。無機系
塗型剤ｌを模型２の内部に流し込み、模型的全面に！２
！型剤を付着させたｌ＆模型２を反転させて塗型剤を排
出させる。無機系粘結剤を使用した乾態中間砂３を模型
２内に入れ、無機系塗型材に付着させた後、残りの中間
砂を排出する０次に有機系粘結剤を使用した中子砂４を
模型２内に充填させ（ブロー充填または振動充填）この
状態でマイクロ波加熱により塗型剤および中子砂を同時
に硬化させる。８！化後の中子には横型内面の性状が正
確に転写された硬質の塗膜層５が形成される。 ＩＩ請
求項２）では、上記中間砂３のかわりに液状有機系樹脂
３ａを用いた以外は、請求項（１）と全く同じ工程で中
子を造型する０表１は前記工程に従って作成した種々の
テストピースの造型条件を示すもので、
※ Ｎ００３は中間砂のかわりに）１２４００Ｍ、を塗
型剤乾燥後、塗布し、中子砂を詰め造型したもの無機系
塗型剤を模型に施工後、直接シェル砂を充填して、マイ
クロ波加熱を行うと塗型剤中の水分が中子砂に浸透しな
いため、塗膜層表面がアバタとなる。そこで加熱中の水
蒸気が通過する道を作るため、塗型剤施工後、無機系の
中間砂を入れ反転排出したあと、シェル砂を充填し、造
型した。これらの中子試験片を第２図に示す鋳込み方案
により鋳鋼を溶製したが、第３図はその時の各々の鋳肌
粗さの測定結果めである０本発明の実施例によるテスト
ビート Ｎｏ、Ｉ Ｎｏ、２では、砂落ちはサンドブラ
ストにて容易に落ち埠肌粗さはＮＯ，Ｉ Ｎｏ、２では
２５〜３０３程度が得られた。(Practice N) An example of the spinning molding method using microwave heating based on the present invention will be described with reference to the drawings. FIG. 1 is a schematic explanatory diagram of a core molding process based on an embodiment of the present invention. Pour the inorganic type coating agent l into the inside of model 2 and cover the entire surface of the model! 2
! 1&Model 2 to which the molding agent is attached is turned over and the molding agent is discharged. Dry intermediate sand 3 using an inorganic binder is put into the model 2, and after adhering to the inorganic coating material, the remaining intermediate sand is discharged.A core using an organic binder. Sand 4 is filled into the model 2 (by blow filling or vibration filling), and in this state, the coating agent and the core sand are simultaneously hardened by microwave heating. 8! A hard coating layer 5 to which the properties of the horizontal inner surface are accurately transferred is formed on the core after curing. II In claim 2), the core is molded in exactly the same process as in claim (1) except that the liquid organic resin 3a is used instead of the intermediate sand 3. This shows the molding conditions of the test piece. *N003 is a mold coated with 12400M (instead of intermediate sand) after drying, filled with core sand and molded. After applying an inorganic molding agent to the model. If shell sand is directly filled and microwave heating is performed, the water in the coating agent does not penetrate into the core sand, so the surface of the coating layer becomes avatar. Therefore, in order to create a path for steam to pass through during heating, after applying the mold coating, inorganic intermediate sand was added, the mold was inverted and discharged, and then shell sand was filled and molded. These core test pieces were melted into cast steel according to the casting method shown in Fig. 2. Fig. 3 shows the measurement results of each casting surface roughness at that time. In I No. 2, the sand was easily removed by sandblasting, and the roughness of the dock surface was about 25 to 303 in I No. 2.
（発明の効果）
以上説明したように本発明によれば、マイクロ波加熱時
、無機系塗型剤及び中間砂が断熱層となり、また中子砂
に含まれている有機系粘結剤が加熱時発生するアンモニ
ヤガス等を模型に当たらないようフィルムの役をするの
で模型の劣化、損傷することを防止する。中子砂は有機
系粘結剤が使用しているので、中子の砂落ち性は良好で
ある。(Effects of the Invention) As explained above, according to the present invention, during microwave heating, the inorganic mold coating agent and the intermediate sand serve as a heat insulating layer, and the organic binder contained in the core sand is heated. It acts as a film to prevent ammonia gas, etc. generated during the process from hitting the model, thereby preventing deterioration and damage to the model. Since the core sand uses an organic binder, the sand removal properties of the core are good.
第１図は本発明実施例にもとづく中子造型工程の概要説
明図。
第２図は本発明実施例にもとづいて製作する中子試験片
の祷込み方案図。
第３図は本発明実施例にもとづいて製作した中子試験片
の鋳肌粗さと測定結果比較図。
第４図は従来技術にもとづくマイクロ波加熱を利用する
誹型造型法の概要説明図である。
１・・・無機系塗型剤
２・・・模型
３・・・無機系粘結剤を使用した中間砂３ａ ・・・液
状有機系樹脂
４・・・有機系粘結剤を使用した中子砂５・・・塗ＩＩ
ＮFIG. 1 is a schematic explanatory diagram of a core molding process based on an embodiment of the present invention. FIG. 2 is a diagram showing a method for inserting a core test piece manufactured based on an embodiment of the present invention. FIG. 3 is a comparison diagram of the casting surface roughness and measurement results of core test pieces manufactured based on the examples of the present invention. FIG. 4 is a schematic explanatory diagram of a molding method using microwave heating based on the prior art. 1... Inorganic type coating agent 2... Model 3... Intermediate sand 3a using an inorganic binder... Liquid organic resin 4... Core using an organic binder Sand 5...Nuri II
N
Claims (2)
ロ波加熱で硬化させる鋳型造型法において、模型内全面
を無機系粘結剤を使用した塗型剤でコーティング後、無
機系粘結剤を使用した乾態中間砂を入れ、反転排出後、
有機系粘結剤を使用した中子砂を充填この状態で、マイ
クロ波加熱により塗型剤および鋳物砂を同時に硬化させ
ることを特徴とするマイクロ波加熱を利用した鋳型造型
法。(1) In the mold making method, in which a core with a coating layer is hardened by microwave heating inside the model, the entire surface of the model is coated with a coating agent that uses an inorganic binder, and then After putting in dry intermediate sand using
A mold making method using microwave heating characterized by filling core sand using an organic binder and curing mold coating agent and foundry sand simultaneously by microwave heating in this state.
ロ波加熱で硬化させる鋳型造型法において、膜型内全面
を無機系塗型剤でコーティング乾燥後、その表面を液状
有機系樹脂で塗布した後、有機系粘結剤を使用した中子
砂を充填この状態でマイクロ波加熱により、塗型剤およ
び鋳物砂を同時に硬化させることを特徴とするマイクロ
波加熱を利用した鋳型造型法。(2) In the mold making method in which a core with a coating layer is hardened by microwave heating in a membrane mold, the entire inside of the membrane mold is coated with an inorganic molding agent and after drying, the surface is coated with a liquid organic resin. A mold making method using microwave heating, characterized in that after coating, core sand using an organic binder is filled, and in this state, the coating agent and foundry sand are simultaneously cured by microwave heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16795689A JPH0775758B2 (en) | 1989-06-29 | 1989-06-29 | Mold making method using microwave heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16795689A JPH0775758B2 (en) | 1989-06-29 | 1989-06-29 | Mold making method using microwave heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0332444A true JPH0332444A (en) | 1991-02-13 |
| JPH0775758B2 JPH0775758B2 (en) | 1995-08-16 |
Family
ID=15859162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16795689A Expired - Lifetime JPH0775758B2 (en) | 1989-06-29 | 1989-06-29 | Mold making method using microwave heating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0775758B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009125799A (en) * | 2007-11-28 | 2009-06-11 | Aisin Takaoka Ltd | Method for producing green sand mold |
| JP2009207923A (en) * | 2002-10-11 | 2009-09-17 | Standfast Enterprises Pty Ltd | Support assembly |
| CN104014740A (en) * | 2014-06-11 | 2014-09-03 | 武汉纺织大学 | Method for increasing moisture absorption resistance of microwave hardened waterglass sand mould |
-
1989
- 1989-06-29 JP JP16795689A patent/JPH0775758B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009207923A (en) * | 2002-10-11 | 2009-09-17 | Standfast Enterprises Pty Ltd | Support assembly |
| US8191680B2 (en) | 2002-10-11 | 2012-06-05 | Standfast Holdings Llc | Support assembly |
| JP2009125799A (en) * | 2007-11-28 | 2009-06-11 | Aisin Takaoka Ltd | Method for producing green sand mold |
| CN104014740A (en) * | 2014-06-11 | 2014-09-03 | 武汉纺织大学 | Method for increasing moisture absorption resistance of microwave hardened waterglass sand mould |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0775758B2 (en) | 1995-08-16 |
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