JPH01197042A - Mold - Google Patents
MoldInfo
- Publication number
- JPH01197042A JPH01197042A JP1997088A JP1997088A JPH01197042A JP H01197042 A JPH01197042 A JP H01197042A JP 1997088 A JP1997088 A JP 1997088A JP 1997088 A JP1997088 A JP 1997088A JP H01197042 A JPH01197042 A JP H01197042A
- Authority
- JP
- Japan
- Prior art keywords
- sand
- mold
- coating
- dry sand
- powder
- 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
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 239000004576 sand Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052845 zircon Inorganic materials 0.000 claims description 5
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 7
- 238000005266 casting Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000004071 soot Substances 0.000 abstract description 5
- 238000005187 foaming Methods 0.000 abstract 2
- 239000003110 molding sand Substances 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 25
- 239000000377 silicon dioxide Substances 0.000 description 5
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000037303 wrinkles Effects 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
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本考案は鋳型の改良に関するものであり、詳しくは、発
泡樹脂模型を非粘結乾燥砂内に埋設した鋳型に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an improvement in a mold, and more particularly, to a mold in which a foamed resin model is embedded in non-caking dry sand.
（従来の技術）
消失模型鋳造法に使用される発泡樹脂模型の表面には、
シリカベースの塗型材またはジルコンベースの＃１型材
が塗布されている（例えば、特公昭５２−４５２８７号
公報）。(Prior art) On the surface of the foamed resin model used in the vanishing model casting method,
A silica-based mold coating material or a zircon-based #1 mold material is applied (for example, Japanese Patent Publication No. 52-45287).
（発明が解決しようとする課題）
従来、発泡樹脂模型の塗型はドブ漬けによってシリカベ
ースの塗型材またはジルコンベースの塗型材を塗布した
後、自然乾燥または強制乾燥して発泡樹脂模型の表面に
塗膜を付着させているが、塗型付着膜厚の不均一、塗型
ひすみ、塗型割れ等を生じるという問題点がある。そこ
で、本発明はかかる問題点を解消するためになされたも
ので、鋳型を改善することにより塗型の欠陥防止を図る
ことを目的とする。(Problem to be Solved by the Invention) Conventionally, a coating mold for a foamed resin model is coated with a silica-based coating material or a zircon-based coating material by dipping, and then air-dried or force-dried to coat the surface of the foamed resin model. Although a coating film is attached, there are problems such as non-uniform coating thickness, coating mold distortion, coating mold cracking, etc. Therefore, the present invention was made to solve such problems, and an object of the present invention is to prevent defects in the coating mold by improving the mold.
（課題を解決するための手段）
本発明は、非粘結乾燥砂に塗型材粉末または黒鉛粉末を
５〜２０重量％重量％口めた鋳型であり、塗型材粉末は
シリコンベースおよび／またはジルコンベースの塗型材
粉末より形成される。(Means for Solving the Problems) The present invention is a mold in which 5 to 20% by weight of coating material powder or graphite powder is added to non-caking dry sand, and the coating material powder is silicon-based and/or zircon-based. It is formed from a base coating material powder.
（作用）
本考案は上述のような構成であるので、非粘結乾燥砂に
塗型材粉末または黒鉛粉末を５〜２０！ｉ量％混合した
鋳物砂内に、発泡樹脂模型を埋設した後、往渇すると、
スス、液状タールおよびガスが鋳物砂内に排出され、表
面欠陥、砂の焼着き、および形状崩れのない鋳物が鋳造
される。(Function) Since the present invention has the above-mentioned configuration, 5 to 20% of coating material powder or graphite powder is added to the non-caking dry sand. After burying a foamed resin model in foundry sand mixed with i amount%, when it is exhausted,
Soot, liquid tar, and gas are discharged into the foundry sand, resulting in castings without surface defects, sand burn-in, and shape deformation.
（実施例）
［実施例１］
乾燥砂６号珪砂に黒鉛粉（純度９９％以上）を１０重量
％混合せしめた鋳物砂内に１発泡樹脂模型を埋設した後
、球状黒鉛鋳鉄溶湯を１４３０℃で注湯すると、スス、
液状タールおよびガスが乾燥砂中に排出され１．湯境、
湯じわ等の表面欠陥、砂の焼着き、および形状崩れのな
いｆｓ物がＳ造される。(Example) [Example 1] After embedding a foamed resin model in foundry sand made by mixing dry No. 6 silica sand with 10% by weight of graphite powder (purity of 99% or more), molten spheroidal graphite cast iron was heated to 1430°C. When pouring hot water, soot,
Liquid tar and gas are discharged into the dry sand1. Yukyo,
An fs product is produced without surface defects such as hot water wrinkles, sand burn-in, and shape deformation.
［実施例２］
乾燥砂５号珪砂にシリカフラワーおよびジルコンフラワ
ーを総量で２０重量％混合せしめた鋳物砂内に、発泡樹
脂模型を埋設した後、球状黒鉛鋳鉄溶湯を１４３０℃で
注湯すると、スス、液状タールおよびガスが乾燥砂中に
排出され、表面欠陥および形状崩れのない０物が鋳造さ
れる。[Example 2] After embedding a foamed resin model in foundry sand made by mixing dry No. 5 silica sand with a total of 20% by weight of silica flour and zircon flour, molten spheroidal graphite cast iron was poured at 1430°C. Soot, liquid tar and gas are discharged into dry sand, and a blank is cast without surface defects and shape deformation.
（発明の効果）
本発明によれば、非粘結乾燥砂に塗型材粉末または黒鉛
粉末を５〜２０重量％混合せしめたので、鋳込み時に発
生するスス、液状タールおよびガスが乾燥砂中に排出さ
れ、表面欠陥、砂の焼肴き、および形状崩れのない鋳物
が鋳造されると共に、１［材の塗布工程および乾燥工程
が不要となり、生産性向上に著しい効果がある。(Effect of the invention) According to the present invention, since 5 to 20% by weight of coating material powder or graphite powder is mixed with non-caking dry sand, soot, liquid tar and gas generated during casting are discharged into the dry sand. As a result, castings with no surface defects, no sand burns, and no deformation of shape can be cast, and the coating and drying steps of 1 [material] are no longer necessary, which has a significant effect on improving productivity.
Claims (3)
おいて、非粘結乾燥砂に塗型材粉末を５〜２０重量％混
合せしめたことを特徴とする鋳型。(1) A mold in which a foamed resin model is embedded in non-caking dry sand, characterized in that 5 to 20% by weight of coating material powder is mixed in the non-caking dry sand.
／またはジルコンベースの塗型材粉末である請求項１記
載の鋳型。(2) The mold according to claim 1, wherein the mold coating powder is a silicon-based mold coating powder and/or a zircon-based mold coating powder.
おいて、非粘結乾燥砂に黒鉛粉末を５〜２０重量％混合
せしめたことを特徴とする鋳型。(3) A mold in which a foamed resin model is embedded in non-caking dry sand, characterized in that graphite powder is mixed in the non-caking dry sand in an amount of 5 to 20% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997088A JPH01197042A (en) | 1988-01-29 | 1988-01-29 | Mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997088A JPH01197042A (en) | 1988-01-29 | 1988-01-29 | Mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01197042A true JPH01197042A (en) | 1989-08-08 |
Family
ID=12014053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1997088A Pending JPH01197042A (en) | 1988-01-29 | 1988-01-29 | Mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01197042A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6376734A (en) * | 1986-09-19 | 1988-04-07 | Hitachi Zosen Corp | Material for casting mold |
-
1988
- 1988-01-29 JP JP1997088A patent/JPH01197042A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6376734A (en) * | 1986-09-19 | 1988-04-07 | Hitachi Zosen Corp | Material for casting mold |
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