JPS6167563A - Casting method by heating casting mold - Google Patents
Casting method by heating casting moldInfo
- Publication number
- JPS6167563A JPS6167563A JP18930984A JP18930984A JPS6167563A JP S6167563 A JPS6167563 A JP S6167563A JP 18930984 A JP18930984 A JP 18930984A JP 18930984 A JP18930984 A JP 18930984A JP S6167563 A JPS6167563 A JP S6167563A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- heating
- mold
- molten metal
- agent
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、アルミニウム、アルミニウム系合金、銅、銅
系合金、鋳鉄、鋳鋼、および、それらの合金などにおけ
る薄物鋳造品、あるいけ薄い部分を有した鋳造品の鋳造
に好適な鋳造方法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to thin castings or thin parts of aluminum, aluminum alloys, copper, copper alloys, cast iron, cast steel, and alloys thereof. The present invention relates to a casting method suitable for casting a cast product having the following properties.
薄物鋳造品の鋳造に関しては、溶湯がその体積の割に大
きな表面積をもって鋳型と接触し、早期のうちに冷却さ
れてその流動性が損われることとなるため、従来では、
金型を利用したダイカスト法によるものしかなく、砂鋳
型による鋳造はなされていなかったものである。When casting thin castings, the molten metal contacts the mold with a large surface area relative to its volume, which causes it to cool early and lose its fluidity.
The only method available was the die-casting method using a metal mold, and casting using a sand mold had not been done.
上記のようなダイカスト法による鋳造では、高価な金型
を各製品毎に用意しなくてはならず、多品種小量生産に
よる鋳造法としては不適蟲なものである。Casting by the die-casting method as described above requires preparing an expensive mold for each product, making it unsuitable for a casting method for high-mix, low-volume production.
本発明は、多品種小量生産に用いるべき鋳型としてコス
ト面で有利な砂鋳型を用い、薄物鋳造品、あるいけ、薄
い部分を有した鋳造品の鋳造を行うことが可能な鋳造方
法を得ることにその目的がある。The present invention provides a casting method that uses sand molds, which are advantageous in terms of cost, as molds for high-mix, low-volume production, and is capable of casting thin castings, or castings with thin parts. Especially for that purpose.
上記問題点を解決するために講じた本願発明の技術手段
は、溶湯の温度で発熱反応を生じる発熱剤を、予め砂鋳
型の内面に添う状態に位置させ、その砂鋳型内に溶湯を
注入して、前記発熱剤の発熱により砂鋳型内に注入され
た溶湯表面の冷却を遅らせるようにしたことである。The technical means of the present invention taken to solve the above problems is to place an exothermic agent that causes an exothermic reaction at the temperature of the molten metal in advance along the inner surface of a sand mold, and to inject the molten metal into the sand mold. Therefore, the cooling of the surface of the molten metal poured into the sand mold is delayed due to the heat generated by the exothermic agent.
上記技術手段を講じた結果、注入された溶湯との接触に
より発熱剤が発熱反応を生じ、その熱が溶湯表面を加熱
する、あるいは、#I湯表面との温度差を少なくして、
溶湯の冷却を遅らせるのである。As a result of taking the above technical measures, the exothermic agent causes an exothermic reaction upon contact with the injected molten metal, and the heat heats the molten metal surface, or reduces the temperature difference with the #I molten metal surface,
This delays the cooling of the molten metal.
上記作用により溶湯の冷却が遅れて、溶湯の流動性が確
保される結果、砂鋳型を用いての鋳造方法でありながら
薄物鋳造品、あるいは、薄い部分を有した鋳造品の鋳造
が可能となった。As a result of the above action, the cooling of the molten metal is delayed and the fluidity of the molten metal is ensured, making it possible to cast thin products or products with thin parts even though the casting method uses a sand mold. Ta.
以下に本発明の詳細な説明する。 The present invention will be explained in detail below.
まず、第2図に示すよう例、適宜鋳物砂を用いて、上型
(2)および下型(31などからなる砂鋳型+11を形
成し、その砂鋳型fl+の砂層(2a)、(3a)の内
面側に形成される鋳込み空間(4)の全域あるいは薄肉
箇所相当部分に発熱剤(5)を塗布し、発熱剤(5)の
層が鋳込み空間(4)の最内側に位置されるようにして
発熱鋳型を構成する(第1図参照)。First, as shown in Fig. 2, a sand mold +11 consisting of an upper mold (2) and a lower mold (31, etc.) is formed using appropriate molding sand, and the sand layers (2a) and (3a) of the sand mold fl+ are formed. Apply the exothermic agent (5) to the entire area of the casting space (4) formed on the inner surface side or to the part corresponding to the thin wall part, so that the layer of the exothermic agent (5) is located at the innermost side of the casting space (4). to construct a heat generating mold (see Figure 1).
上記のように構成された発熱鋳型の湯口(5)から溶湯
を注入し、鋳込み空間(4)内で所望形状の薄物鋳造品
を鋳造する。 図中符号(7)は押湯口である。Molten metal is injected from the sprue (5) of the exothermic mold configured as described above, and a thin cast product of a desired shape is cast within the casting space (4). Reference numeral (7) in the figure is a feeder opening.
前記発熱剤(5)は、アルミニタムの如き易酸化性金属
、酸化鉄の如き酸化剤、塩化パリクム、塩素酸カリタム
、マグネシクム等からなる発熱促進剤と、けい素あるい
けシャモット等の耐火材料とを適量づつ混練して、テル
ミット反応による発熱(20σ0°(:、、2JOO℃
程度)を生じるように構成しである。 尚、けい素ある
いけシャモットなどの耐火材料は、発熱反応によって発
熱促進剤が溶失した後でもその耐火材料が鋳込み空間(
4)の周面釦多孔質層の状態で残り、鋳込み空間(4)
の寸法精度を維持できるようにするために用いられるが
、鋳造品にそれほど寸法的精度を要求されない場合には
、これを省略することも可能である。The exothermic agent (5) includes an exothermic accelerator consisting of an easily oxidizable metal such as aluminum, an oxidizing agent such as iron oxide, palicum chloride, potassium chloride, magnesium, etc., and a refractory material such as silicon or chamotte. Knead appropriate amounts at a time to generate heat due to thermite reaction (20σ0°(:,,2JOO℃)
degree). In addition, for refractory materials such as silicone or ikechamotte, the refractory material remains in the casting space (
4) The peripheral surface of the button remains in the state of a porous layer, and the casting space (4)
This is used to maintain the dimensional accuracy of the casting, but it can be omitted if the cast product does not require much dimensional accuracy.
また、発熱促進剤は前述したものの総てを用いる必9け
なく、所要の発熱温度、あるいは、発熱反応速度を得る
に適切なものを選択して用いることは自由である。In addition, it is not necessary to use all of the exothermic accelerators mentioned above, and it is possible to select and use an appropriate one to obtain the required exothermic temperature or exothermic reaction rate.
前記発熱剤(5)の使用量は、溶湯が鋳込み空間囚の隅
々までスムーズに流動するに適切な量を用いれば良い。The exothermic agent (5) may be used in an appropriate amount so that the molten metal flows smoothly to every corner of the casting space.
例えば厚さj ””−J ml程度の平板状鋳鉄であ
る場合、約O,j〜/朋程度で好適な流動性を得られた
が、これは発熱剤(5)の種類や性能、あるいは、鋳造
品の材質や形状等によって大きく変化するので、その都
度適切な量を用いることが望ましい。For example, in the case of flat cast iron with a thickness of about j '' - J ml, suitable fluidity was obtained at about O,j~/h, but this may depend on the type and performance of the exothermic agent (5), or , varies greatly depending on the material, shape, etc. of the cast product, so it is desirable to use an appropriate amount each time.
また、発熱剤(5)を鋳型内面部分に位置きせるには、
前述実施例のよ、うにハケやスプレーで塗布するものに
代え、第3,4図に示すように、板状あるいけ粒状に固
化させた発熱剤(5)を鋳込み空間囚に面した状態で、
樹脂製接着剤(8)などの適宜接着手段を用いて貼着さ
せても良く、また、鋳込み空間(4)の全域にわたらず
、適所に散在する状態で設けても良い。In addition, in order to position the exothermic agent (5) on the inner surface of the mold,
Instead of applying it with a brush or spray as in the previous embodiment, as shown in Figures 3 and 4, a heat-generating agent (5) solidified in the form of a plate or granules is cast and placed facing the inner space. ,
They may be attached using an appropriate adhesive means such as a resin adhesive (8), or they may be scattered at appropriate locations rather than covering the entire area of the casting space (4).
尚、この第8図、第4図の実施例では、発熱剤(5)を
砂鋳型(1)の内面に塗布された塗型剤(4)の表面に
重ねて位置させているが、この実施例の場合にも、塗型
剤(4)を用いずに砂層(2a)、(3a)の表面に直
接的に発熱剤(61を位置させても良い。In the embodiments shown in FIGS. 8 and 4, the exothermic agent (5) is placed over the surface of the coating agent (4) applied to the inner surface of the sand mold (1). In the case of the embodiment as well, the exothermic agent (61) may be placed directly on the surface of the sand layers (2a) and (3a) without using the coating agent (4).
前記発熱剤(5)としては、テルミット反応を生じるも
ののよう九高温を発するものが望ましいが、溶湯に対し
て熱を加えるほどの高温を発するものでなくとも、溶湯
の湯温よシやや低い温度で溶湯の冷却速度を遅くする程
度に発熱するものでも良い。The exothermic agent (5) is preferably one that generates a high temperature, such as one that causes a thermite reaction, but even if it does not generate a high enough temperature to add heat to the molten metal, it may be used at a temperature that is slightly lower than the temperature of the molten metal. It may be one that generates enough heat to slow down the cooling rate of the molten metal.
図面は本発明の実施例を示し、第1図は発熱鋳型の部分
拡大断面図、第2図は発熱鋳型の概略断面図、第8図お
よび第4図は発熱剤の設は方の別実施例である。
il+・・・・・・砂鋳型、(5)・・・・・・発熱剤
。The drawings show embodiments of the present invention; FIG. 1 is a partially enlarged cross-sectional view of a heat-generating mold, FIG. 2 is a schematic cross-sectional view of a heat-generating mold, and FIGS. 8 and 4 show different implementations of the setting of a heat-generating agent. This is an example. il+...Sand mold, (5)...Exothermic agent.
Claims (1)
鋳型(1)の内面部分に添う状態に位置させ、その砂鋳
型(1)内に溶湯を注入して、前記発熱剤(5)の発熱
により砂鋳型(1)内に注入された溶湯表面の冷却を遅
らせるべくした発熱鋳型による鋳造方法。An exothermic agent (5) that causes an exothermic reaction at the temperature of the molten metal is placed in advance along the inner surface of the sand mold (1), and the molten metal is poured into the sand mold (1) to remove the exothermic agent (5). A casting method using an exothermic mold in which cooling of the surface of the molten metal poured into the sand mold (1) is delayed by the heat generated by the sand mold (1).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18930984A JPS6167563A (en) | 1984-09-10 | 1984-09-10 | Casting method by heating casting mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18930984A JPS6167563A (en) | 1984-09-10 | 1984-09-10 | Casting method by heating casting mold |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6167563A true JPS6167563A (en) | 1986-04-07 |
Family
ID=16239184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18930984A Pending JPS6167563A (en) | 1984-09-10 | 1984-09-10 | Casting method by heating casting mold |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6167563A (en) |
-
1984
- 1984-09-10 JP JP18930984A patent/JPS6167563A/en active Pending
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