JPH0113940B2 - - Google Patents
Info
- Publication number
- JPH0113940B2 JPH0113940B2 JP3270481A JP3270481A JPH0113940B2 JP H0113940 B2 JPH0113940 B2 JP H0113940B2 JP 3270481 A JP3270481 A JP 3270481A JP 3270481 A JP3270481 A JP 3270481A JP H0113940 B2 JPH0113940 B2 JP H0113940B2
- Authority
- JP
- Japan
- Prior art keywords
- fugitive
- casting
- original form
- reinforcing material
- original
- 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
Links
- 238000005266 casting Methods 0.000 claims description 19
- 239000012779 reinforcing material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000003110 molding sand Substances 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 4
- 238000010115 full-mold casting Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- UPZFLZYXYGBAPL-UHFFFAOYSA-N 2-ethyl-2-methyl-1,3-dioxolane Chemical compound CCC1(C)OCCO1 UPZFLZYXYGBAPL-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】
本発明は、発泡性合成樹脂を消失性原形とする
フルモールド鋳造方法に関するもので、その目的
とするところは複雑な形状若しくは薄肉の鋳造物
を作成する場合、その鋳造物の曲り歪み等を回避
すると共に廉価に又は量産可能にすることにあ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a full mold casting method using a foamable synthetic resin as a fugitive original shape, and its purpose is to prevent the casting of complex-shaped or thin-walled castings. The object is to avoid bending and distortion of objects, and to enable mass production at low cost.
従来、鋳造に関する方法の選択として、薄肉の
ものとか、端部形状が細く複雑なものに関して
は、砂型、金型による鋳型を用いることが多く、
発泡性樹脂を消失性原形とするフルモールド鋳造
については、他の方法では難しいと言われている
立体的な複雑さを有するものも容易にでき、又、
量産に向くとか鋳造作業が簡単とかの利点を有し
ているが、薄肉のものとか、端部形状が細く複雑
なものは不向きであると言われている。つまり、
発泡性樹脂を予定形状に作成しても、鋳枠内の鋳
物砂内に埋設する作業中に於いて、発泡性樹脂の
自重に加えて、鋳物砂の圧力等によつて消失性原
形の形状が変形してしまい満足な鋳造効果を得る
ことはできなかつた。 Conventionally, when it comes to casting methods, sand molds or metal molds are often used for thin-walled items or items with narrow and complicated end shapes.
Full mold casting, which uses foamable resin as a fugitive prototype, can easily produce objects with three-dimensional complexity that are said to be difficult with other methods.
It has the advantages of being suitable for mass production and easy casting work, but it is said to be unsuitable for thin walls and complex end shapes. In other words,
Even if the foamable resin is made into the planned shape, during the process of embedding it in the molding sand in the mold, the shape of the original shape will disappear due to the weight of the foamable resin as well as the pressure of the molding sand. was deformed and it was not possible to obtain a satisfactory casting effect.
本発明は、以上のような点に鑑みなされたもの
で、鋳枠内の鋳物砂内に発泡性樹脂の消失性原形
を埋設し、該消失性原性に溶融金属を注入して鋳
造するフルモールド鋳造方法に於いて、所定形状
に成型された消失性原形の外周囲若しくは適宜位
置を補強材によつて補強し、該補強材を施した消
失性原形を鋳枠内の鋳物砂内に埋設して溶融金属
を注入することを特徴とする。つまり、薄肉のも
のとか端部形状が細く複雑なものを鋳造するに際
し、所定の形状に作成された消失性原形をまえも
つて補強材によつて全体形状が埋設作業中に変形
することのないように補強するのである。そうす
ることによつて曲り歪みのない精度の高い鋳造物
を得ることができる。 The present invention has been made in view of the above points, and is a full-form casting method in which a fugitive form of foamable resin is buried in molding sand in a casting flask, and molten metal is injected into the fugitive form. In the mold casting method, the outer periphery or appropriate position of a fugitive original molded into a predetermined shape is reinforced with a reinforcing material, and the fugitive original molded with the reinforcing material is buried in molding sand in a casting flask. It is characterized by injecting molten metal. In other words, when casting thin-walled items or items with narrow end shapes and complex shapes, the reinforcing material prevents the overall shape from deforming during the burying process, with the evanescent original created in a predetermined shape. It is reinforced in this way. By doing so, a highly accurate casting free from bending distortion can be obtained.
つぎに本発明の実施例を添付図面について説明
する。１は消失性原形で、実施例としては発泡ポ
リスチロールを使用した。２が補強材である。 Next, embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a fugitive original form, and foamed polystyrene was used as an example. 2 is a reinforcing material.
本実施例の実験装置としては、減圧鋳造方法を
用いた。３は鋳枠で多数の通気孔４を有してい
る。５は通気室で真空ポンプで吸引を行なつた。
溶融金属にはアルミニウム合金（AC７Ａ）を用
い約800℃で注入した。第１図の例では、補強材
２として鉄製針金を消失性原形１の外周形状に沿
うように型をとり接着剤６（エチレン酢酸等消失
性原形を溶さないもの）で定着した。尚、溶融金
属の注入温度としては700℃前後でもよいが、補
強材１等によつて温度が下がることを考慮に入れ
800℃ぐらいに高くした方が結果的には良好であ
つた。第２図は、補強材２に粘着性テープを用い
た例で消失性原形１の弱い部分に市販の粘着性テ
ープを貼り補強を行なつた。消失性原形１の形状
にも左右されるが、小さい部分とか細かい部分の
補強には市販のテープで充分目的を達成できる。
尚、テープは、溶融金属の熱で消滅してしまうた
め除去等の手間が省け、回収作業が簡略化でき
る。第３図は補強材２に鉄製の枠体を用いた例で
ある。所定形状に成形された消失性原形１が係合
する枠体によつて消失性原形１を内持させる。補
強材２と消失性原形１とは密接させておく方が作
業中外れたりしないためにも好ましいが、少々ガ
タツキがある場合は前記接着剤等で定着しておけ
ばよい。 As the experimental equipment of this example, a vacuum casting method was used. 3 is a casting flask having a large number of ventilation holes 4. 5, suction was performed using a vacuum pump in the ventilation chamber.
Aluminum alloy (AC7A) was used as the molten metal and injected at about 800°C. In the example shown in FIG. 1, an iron wire as the reinforcing material 2 was molded along the outer circumference of the fugitive original form 1 and fixed with an adhesive 6 (such as ethylene acetic acid, which does not dissolve the fugitive original form). The injection temperature of the molten metal may be around 700℃, but please take into account that the temperature will drop due to reinforcement material 1 etc.
The results were better when the temperature was raised to about 800°C. FIG. 2 shows an example in which adhesive tape is used as the reinforcing material 2, and a commercially available adhesive tape is applied to the weak parts of the fugitive master form 1 for reinforcement. Although it depends on the shape of the fugitive master form 1, commercially available tapes can be used to sufficiently achieve the purpose of reinforcing small or fine parts.
Incidentally, since the tape disappears due to the heat of the molten metal, the trouble of removing the tape can be saved, and the recovery work can be simplified. FIG. 3 shows an example in which an iron frame is used as the reinforcing material 2. The fugitive original form 1 formed into a predetermined shape is held inside by a frame body that engages with the fugitive original form 1. It is preferable to keep the reinforcing material 2 and the fugitive original form 1 in close contact with each other in order to prevent them from coming off during work, but if there is some wobbling, it is best to fix it with the adhesive or the like.
尚、枠体とした補強材２の場合、消失性原形１
の形状にも左右されるが外周全域に枠体を当接さ
せる必要はない。つまり枠体自体を複雑な形状に
作成する必要はなく、消失性原形１の適宜外接点
若しくは外接線を保持しておけば所期の目的は達
成できる。 In addition, in the case of reinforcing material 2 as a frame, the vanishing original form 1
Although it depends on the shape of the frame, it is not necessary for the frame to be in contact with the entire outer periphery. In other words, it is not necessary to create the frame itself into a complicated shape, and the desired purpose can be achieved by maintaining appropriate external contact points or external tangents of the evanescent original form 1.
本発明は、以上のように所定形状に成形された
消失性原形の外周囲若しくは適宜位置を補強材に
よつて補強しているため複雑な形状とか薄肉の鋳
造物を作成する場合に於いても、消失性原形が頑
丈となり鋳物砂内に埋設する作業中等に於いても
端部若しくは全体の曲り、歪みが回避でき、複雑
な形状とか薄肉の鋳造物を作成する場合、特に有
効である。尚、消失性原形は発泡性合成樹脂であ
るので大量に成型でき補強作業も極めて簡単であ
るので廉価に又、大量生産できる等実施上の効果
は多大である。 As described above, the present invention reinforces the outer periphery or appropriate position of the fugitive master molded into a predetermined shape with a reinforcing material, so even when creating a complex shape or thin-walled casting. , the fugitive original shape becomes strong, and bending or distortion of the end or the entire body can be avoided even during work such as embedding in foundry sand, which is particularly effective when creating complex-shaped or thin-walled castings. Incidentally, since the fugitive original form is made of a foamable synthetic resin, it can be molded in large quantities and the reinforcing work is extremely simple, so it can be produced at low cost and in large quantities, which has many practical effects.
第１図は本発明の一実施例でＡは補強材を取り
付けた消失性原形の正面図、Ｂはその側面図、第
２図は本発明の一実施例で補強材を取り付けた消
失性原形の端部正面図、第３図は本発明の一実施
例で枠体の補強材を施した消失性原形の斜視図、
第４図は、本発明の一実施例の装置断面図であ
る。
１……消失性原形、２……補強材、３……接着
剤、４……鋳枠、５……通気孔、６……通気室、
７……鋳物砂、８……湯口。
Fig. 1 is an embodiment of the present invention, in which A is a front view of a fugitive original with a reinforcing material attached, B is a side view thereof, and Fig. 2 is an embodiment of the present invention, in which a fugitive original is attached with a reinforcing material. FIG. 3 is a perspective view of the evanescent original form with reinforcing material applied to the frame according to an embodiment of the present invention;
FIG. 4 is a sectional view of a device according to an embodiment of the present invention. 1... Erasable original form, 2... Reinforcement material, 3... Adhesive, 4... Cast flask, 5... Ventilation hole, 6... Ventilation chamber,
7... Foundry sand, 8... Sprue.
Claims (1)
消失性原形に溶融金属を注入して鋳造するフルモ
ールド鋳造方法に於いて、所定形状に成型された
消失性原形の外周囲若しくは、適宜位置を補強材
によつて補強し、該補強材を施した消失性原形を
鋳枠内の鋳物砂内に埋設して、溶融金属を注入す
ることを特徴とする鋳造方法。1. In the full mold casting method in which a fugitive original form is buried in foundry sand in a casting flask and molten metal is poured into the fugitive original form for casting, the outer periphery of the fugitive original form molded into a predetermined shape or . A casting method, which comprises reinforcing appropriate positions with reinforcing materials, burying the fugitive master shape provided with the reinforcing material in molding sand in a casting flask, and injecting molten metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3270481A JPS57146448A (en) | 1981-03-05 | 1981-03-05 | Casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3270481A JPS57146448A (en) | 1981-03-05 | 1981-03-05 | Casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57146448A JPS57146448A (en) | 1982-09-09 |
| JPH0113940B2 true JPH0113940B2 (en) | 1989-03-08 |
Family
ID=12366226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3270481A Granted JPS57146448A (en) | 1981-03-05 | 1981-03-05 | Casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57146448A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014124678A (en) * | 2012-12-27 | 2014-07-07 | Lixil Corp | Mold and cast structure |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4609028A (en) * | 1984-06-20 | 1986-09-02 | Outboard Marine Corporation | Evaporative pattern assembly for use in sand casting |
| JPH0636957B2 (en) * | 1985-05-29 | 1994-05-18 | マツダ株式会社 | Filling and casting method |
| CN109382494A (en) * | 2018-11-28 | 2019-02-26 | 贵州安吉航空精密铸造有限责任公司 | A kind of formwork reinforcement means during spin cast paint |
-
1981
- 1981-03-05 JP JP3270481A patent/JPS57146448A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014124678A (en) * | 2012-12-27 | 2014-07-07 | Lixil Corp | Mold and cast structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57146448A (en) | 1982-09-09 |
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