JPS6049831A - Expendable pattern material for casting - Google Patents
Expendable pattern material for castingInfo
- Publication number
- JPS6049831A JPS6049831A JP15703283A JP15703283A JPS6049831A JP S6049831 A JPS6049831 A JP S6049831A JP 15703283 A JP15703283 A JP 15703283A JP 15703283 A JP15703283 A JP 15703283A JP S6049831 A JPS6049831 A JP S6049831A
- Authority
- JP
- Japan
- Prior art keywords
- magnesium
- casting
- resin particles
- pattern
- polyethylene
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 title claims abstract description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 11
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 10
- 239000011777 magnesium Substances 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 239000004698 Polyethylene Substances 0.000 claims abstract description 7
- -1 polyethylene Polymers 0.000 claims abstract description 7
- 229920000573 polyethylene Polymers 0.000 claims abstract description 7
- 239000004793 Polystyrene Substances 0.000 claims abstract description 6
- 229920002223 polystyrene Polymers 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000010348 incorporation Methods 0.000 abstract 2
- 239000011344 liquid material Substances 0.000 abstract 1
- 239000006260 foam Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
- B22C7/023—Patterns made from expanded plastic materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は鋳造用の消失性模型材料に関するものである。[Detailed description of the invention] The present invention relates to fugitive pattern materials for casting.
ポリエチレン、ポリスチロールその他樹脂発泡成形体で
模型を作り、これを砂の中に埋めて、これに１ａｏｏ℃
〜１６００℃前後の溶融金属を注入して鋳物を製造する
消失性模型を使用する鋳造法では、ポリエチレン等発泡
体が燃焼時に多量のスス（炭素）を発生し、空洞部分に
不完全燃焼によって残留する炭素及び燃焼残渣によって
鋳物の表面が汚染され、また鋳肌の悪い不良製品ができ
たり、あるいは造型された製品にクシツクを発生して割
れたりし、不５良率が高くなることが少くなかった。と
くに鋳鉄異形管で、その立上り管の長いものにおいては
、先端に行くにしたがって溶融金属の温度が下り、前述
の不完全燃焼の発生する率が高くなることは、本発明者
等がよく経験するところであり、かつ前述のような問題
が生ずるところである。一方このような場合完全燃焼を
達成する為に、前記の発泡体の発泡倍率を高めて消失性
模型を成形すればよいが、このように発泡倍率を高める
と発泡成形体が脆弱であって破損し易く、取扱中、また
は砂に埋める際に破損するおそれがありこれまた問題の
あるところである。Make a model from polyethylene, polystyrene, or other resin foam moldings, bury it in sand, and heat it to 1 aoooC.
In the casting method that uses a fugitive model to manufacture castings by injecting molten metal at around 1,600℃, a large amount of soot (carbon) is generated when polyethylene and other foams burn, and some remain in the hollow parts due to incomplete combustion. The surface of the casting is contaminated by the carbon and combustion residue produced by the casting, and it often results in defective products with poor casting surfaces, or cracks and cracks in the molded products, resulting in a high rejection rate. Ta. The inventors of the present invention have often experienced that, especially in cast iron irregular-shaped pipes with long risers, the temperature of the molten metal decreases as it approaches the tip, and the rate of occurrence of the aforementioned incomplete combustion increases. However, the above-mentioned problems arise. On the other hand, in such a case, in order to achieve complete combustion, it is possible to mold a fugitive model by increasing the expansion ratio of the foam, but if the expansion ratio is increased in this way, the foam molded product becomes brittle and may break. This is another problem as it is easy to break and can be damaged during handling or when buried in sand.
上記に鑑み本発明は、鋳造用の消失性模型の燃焼効率を
向上させることができる鋳造用消失性模型材料を提供す
ることにある。In view of the above, an object of the present invention is to provide a fugitive casting model material that can improve the combustion efficiency of a fugitive casting model.
次に本発明の実施例について説明する。Next, examples of the present invention will be described.
鋳造用消失性模型材料は次のようにしてＲ製される。す
なわち、ポリエチレン、ポリスチロールその他樹脂粒子
（発泡倍率が略８０〜９０倍のもので未発泡の粒子）１
００重量部に対して、マグネシウムの粉末粒子を５〜ｌ
Ｏ重量部混合するか、またはマグネシウムの液状物を５
〜ｌＯ重量部混練し、望ましくは前記樹脂粒子の表面を
スグネシウムの溶液で被覆するようにするとよい。いず
れにしても前記樹脂粒子に少量のマグネシウムが混入さ
れていればよいのである。尚マグネシウムを５〜ｌＯ重
量部としたのは、成形される消失性模型に発火能力を付
与し、かつ僅かの熱や湿度で点火しないようにする為で
あり、望ましくは５重量部が最適であると考えられる。The fugitive model material for casting is manufactured by R as follows. That is, polyethylene, polystyrene, and other resin particles (unfoamed particles with an expansion ratio of about 80 to 90 times) 1
00 parts by weight, 5 to 1 of magnesium powder particles
Mix 5 parts by weight of O or 5 parts by weight of magnesium liquid.
~10 parts by weight are kneaded, and preferably the surfaces of the resin particles are coated with the sgnesium solution. In any case, it is sufficient if a small amount of magnesium is mixed into the resin particles. The reason why the amount of magnesium is 5 to 10 parts by weight is to impart ignition ability to the fugitive model to be molded and to prevent it from igniting even with slight heat or humidity, and preferably 5 parts by weight is optimal. It is believed that there is.
以上述べたごとく、本発明の鋳造用消失性模型材料を用
い消失性模型を成形した場合法のような効果が考えられ
る。As described above, effects similar to those obtained when a fugitive model is molded using the fugitive casting model material of the present invention can be considered.
■消失性模型自体に発火能力が付与され、その不完全燃
焼を防止することができるし、溶融金属の温度低下を防
止することができる０■不完全燃焼によって生ずる諸ト
ラブル、例えばシワ等の発生による鋳肌の不良とか、ピ
ンホールの発生を未然に防止でき、不良率の低下が期待
できる０
■成形時における前記樹脂粒子の発泡倍率を幾分おさえ
ることが可能で、消失性模型の強度性が向上する。■The fugitive model itself has the ability to ignite, preventing its incomplete combustion, and also preventing the temperature of the molten metal from decreasing.■Problems caused by incomplete combustion, such as wrinkles, etc. It is possible to prevent defects in the casting surface and the occurrence of pinholes due to molding, and a reduction in the defective rate can be expected. will improve.
■消失性模型のガス化が促進され、作業性の向上とか品
質の向上が期待できる。■ Gasification of fugitive models is promoted, and improvements in workability and quality can be expected.
特許出願人 外山鋳造株式会社Patent applicant: Toyama Foundry Co., Ltd.
Claims (1)
量のマグネシウムとから成ることを特徴とする鋳造用消
失性模型材料。 （ＩＩ） ポリエチレン、ポリスチロール等樹脂粒子１
００重量部に対し、マグネシウム５重量部とした特許請
求の範囲第１項記載の鋳造用消失性模型材料。(1) A fugitive casting model material characterized by consisting of resin particles such as polyethylene or polystyrene and a small amount of magnesium. (II) Polyethylene, polystyrene, etc. resin particles 1
The fugitive casting model material according to claim 1, wherein the content is 5 parts by weight of magnesium per 00 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15703283A JPS6049831A (en) | 1983-08-26 | 1983-08-26 | Expendable pattern material for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15703283A JPS6049831A (en) | 1983-08-26 | 1983-08-26 | Expendable pattern material for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6049831A true JPS6049831A (en) | 1985-03-19 |
Family
ID=15640694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15703283A Pending JPS6049831A (en) | 1983-08-26 | 1983-08-26 | Expendable pattern material for casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6049831A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259169A (en) * | 2011-08-15 | 2011-11-30 | 中核苏阀横店机械有限公司 | Method for brushing white alundum powder paint |
-
1983
- 1983-08-26 JP JP15703283A patent/JPS6049831A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259169A (en) * | 2011-08-15 | 2011-11-30 | 中核苏阀横店机械有限公司 | Method for brushing white alundum powder paint |
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