JPS63115645A - Shaping method for casting mold consisting of foamed material - Google Patents
Shaping method for casting mold consisting of foamed materialInfo
- Publication number
- JPS63115645A JPS63115645A JP26058586A JP26058586A JPS63115645A JP S63115645 A JPS63115645 A JP S63115645A JP 26058586 A JP26058586 A JP 26058586A JP 26058586 A JP26058586 A JP 26058586A JP S63115645 A JPS63115645 A JP S63115645A
- Authority
- JP
- Japan
- Prior art keywords
- soln
- foamed material
- mold
- cellulose acetate
- casting
- 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
- 239000000463 material Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 11
- 238000007493 shaping process Methods 0.000 title claims description 6
- 238000005266 casting Methods 0.000 title abstract description 19
- 229920002301 cellulose acetate Polymers 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 14
- -1 polypropylene Polymers 0.000 claims abstract description 11
- 239000004743 Polypropylene Substances 0.000 claims abstract description 8
- 229920001155 polypropylene Polymers 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 6
- 239000004793 Polystyrene Substances 0.000 claims abstract description 5
- 239000006260 foam Substances 0.000 claims description 5
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 8
- 238000000576 coating method Methods 0.000 abstract description 8
- 150000002576 ketones Chemical class 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 239000003110 molding sand Substances 0.000 abstract description 2
- 229920013716 polyethylene resin Polymers 0.000 abstract description 2
- 239000002344 surface layer Substances 0.000 abstract description 2
- 229920000875 Dissolving pulp Polymers 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 229920005990 polystyrene resin Polymers 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
- 239000006261 foam material Substances 0.000 description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 150000005846 sugar alcohols Chemical class 0.000 description 1
- 230000003746 surface roughness 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)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、鋳物用発泡材製鋳型表面に平滑性を付与する
鋳型整形方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a mold shaping method for imparting smoothness to the surface of a foam mold for casting.
鋳物を作るには、先ず鋳型を製作し、それを鋳物砂で固
めて湯道から溶湯を流して冷却後に鋳物ができる。この
場合の鋳型としては、過去木型が主流であったが、最近
では木型を取り外す手間や寸法精度などの点から、発泡
材の使用が増えており、有害ガスの発生が殆んどない発
泡ポリプロピレンや発泡ポリスチレンが利用されている
。To make a casting, first a mold is made, then it is hardened with foundry sand, the molten metal is poured through a runner, and after cooling, the casting is made. In the past, wooden molds were the mainstream for molds in this case, but recently foam materials have been increasingly used due to the hassle of removing the wooden mold and dimensional accuracy, and they generate almost no harmful gases. Foamed polypropylene and expanded polystyrene are used.
ところで、発泡材は、３０〜４０倍の発泡倍率であシ均
−発泡が困難で、表面には凹みができる。又鋳型として
加工するときにどうしても凹が生じるなどの短所がある
ため、でき上った鋳物の肌が悪くなることから表面が平
滑な鋳物の開発が望まれている。By the way, foaming materials have a foaming ratio of 30 to 40 times and are difficult to foam evenly, resulting in dents on the surface. In addition, there are disadvantages such as concavities that inevitably occur when processing them into molds, and the surface of the finished casting becomes poor, so there is a desire to develop a casting with a smooth surface.
本発明は、上記要望に沿うものであって、上述した発泡
材を利用する鋳型に係り、この鋳型表面に平滑性を付与
する鋳型整形方法を提供することを目的とする。The present invention meets the above-mentioned needs and relates to a mold using the above-mentioned foamed material, and an object of the present invention is to provide a mold shaping method that imparts smoothness to the surface of the mold.
そして、本発明は上記目的を達成するため、酢酸セルロ
ースを溶媒に溶解させたもの、又はこれにポリプロピレ
ン、ポリエチレン、ポリスチレン粉末を配合したものを
、発泡材からなる鋳型表面に塗布する手段を採用するも
のである。In order to achieve the above object, the present invention employs a method of applying cellulose acetate dissolved in a solvent, or a mixture thereof with polypropylene, polyethylene, or polystyrene powder, onto the surface of a mold made of a foam material. It is something.
すなわち本発明は、酢酸セルロースを溶解し発泡材から
なる鋳型を溶解しない溶剤に酢酸セルロースを溶解させ
たもの又はこの溶液とポリプロピレン、ポリエチレン、
ポリスチレン粉末からなる配合物を被塗物の凹み面に塗
布し、平滑にすることを特徴とする発泡材よりなる鋳型
整形方法である。That is, the present invention provides a solution in which cellulose acetate is dissolved in a solvent that dissolves cellulose acetate but does not dissolve a mold made of a foamed material, or a solution in which cellulose acetate is dissolved in a solvent such as polypropylene, polyethylene,
This is a method for shaping a mold made of a foamed material, which is characterized by applying a compound made of polystyrene powder to the concave surface of the object to be coated and smoothing it.
本発明の詳細な説明すると、前述したように、発泡スチ
レン、発泡ポリプロピレンは、表面が平滑でなく凹みが
あるため、該表面を平滑にする方法として、本発明では
、酢酸セルロースを溶媒で溶解し、酢酸セルロースの溶
解量で粘度が変化することを利用して凹みの深さに対応
させるようにして平滑性を付与するようにし、又凹みの
深いものに対しては、ポリプロピレン、ポリスチレン、
ポリエチレン樹脂の粉末を添加して平滑性を付与するよ
うにしたものである。To explain the present invention in detail, as mentioned above, the surfaces of expanded styrene and expanded polypropylene are not smooth and have dents, so in the present invention, as a method for smoothing the surface, cellulose acetate is dissolved in a solvent. By utilizing the fact that the viscosity changes depending on the amount of dissolved cellulose acetate, smoothness can be imparted to correspond to the depth of the dent, and for deep dents, polypropylene, polystyrene,
Polyethylene resin powder is added to impart smoothness.
すなわち、本発明者らは、前述の発泡材表面を平滑にす
るため、発泡材を溶解させないアクリル系塗料を塗布す
ると平滑性は保てるが、厚塗シするとクツツクが発生し
、鋳込み後塗料中の顔料が残存するなどで平滑性の付与
はできないことを知見し、そこで鋳物の平滑性を創出す
べく鋭意研究を重ねた結果、酢酸セルロースを溶媒で溶
解し、発泡材の表面アヲサに適した濃度の溶液を塗布し
鋳型を製作したところ、溶湯を流した後は発泡材ととも
に完全に燃焼しＣｏｚ十Ｈ２０に分解して無害となり、
鋳物の平滑性が得られることを見出し本発明の完成に至
った。In other words, in order to smooth the surface of the foamed material mentioned above, the inventors found that by applying an acrylic paint that does not dissolve the foamed material, the smoothness can be maintained, but if it is applied too thick, it will cause scratches and the paint will not dissolve after casting. It was discovered that smoothness could not be imparted due to residual pigments, etc., and as a result of intensive research to create smoothness in castings, cellulose acetate was dissolved in a solvent and a concentration suitable for the surface roughness of the foam material was obtained. When a mold was made by applying a solution of
It was discovered that smoothness of castings could be obtained, leading to the completion of the present invention.
本発明による発泡材表面の平滑性を付与する方法では、
発泡材を溶解することなく、酢酸セ／Ｌ／ロースを溶解
できる溶媒の選定が必須条件で且塗布後のたれを防止す
るために乾燥性の早いケトン類の溶媒で溶解させるのが
望ましい。In the method of imparting smoothness to the surface of a foam material according to the present invention,
It is essential to select a solvent that can dissolve the acetic acid C/L/loose without dissolving the foaming material, and it is preferable to use a ketone solvent that dries quickly to prevent dripping after application.
この溶解した溶液をヘラ、刷毛、スブＶ−で発泡材に塗
布すると、表層から乾燥し数分で被膜が形成し発泡材表
面を平滑にすることができる。次いでその表面に塗型を
塗布し、乾燥した鋳型を鋳物砂で固めて、溶湯を流し込
むと、発泡材と被膜が燃焼し被膜はｃ’ｏ２＋Ｈ，Ｏに
分解して消失され平滑な肌をした鋳物ができる。When this dissolved solution is applied to the foam material using a spatula, brush, or brush V-, the surface layer dries and forms a film in a few minutes, making it possible to smooth the surface of the foam material. Next, a coating mold was applied to the surface, the dried mold was hardened with molding sand, and molten metal was poured in. The foam material and coating burned, and the coating decomposed into c'o2 + H and O and disappeared, leaving a smooth surface. Castings can be made.
本発明では、上記したように酢酸セルロースに対する溶
媒としてケトン類が好ましいが、その他エステル類、エ
ーテル類、多価アμコールエステ／ｌ／類、フラン類、
酸類などの溶媒が使用でき、また、この溶媒に対して酢
酸セルロースを５〜２８チの範囲で溶解させたものを使
用するのが好ましい。In the present invention, ketones are preferred as solvents for cellulose acetate as described above, but other solvents include esters, ethers, polyhydric alcohol esters, furans,
A solvent such as an acid can be used, and it is preferable to use a solution in which cellulose acetate is dissolved in the solvent in a range of 5 to 28 hours.
以下第１〜６図に基づいて本発明をより詳細に説明する
と、第１図〜第３図は本発明で使用する各発泡材の断面
図であり、第４図〜第６図は本発明による整形方法を適
用して得られた施工体の断面図である。第１図〜第３図
に示す各発泡体２を使用し、この発泡体２０表面の凹を
平滑化するため、第４図〜第６図に示すように塗膜１を
塗布する。The present invention will be explained in more detail based on FIGS. 1 to 6 below. FIGS. 1 to 3 are cross-sectional views of each foam material used in the present invention, and FIGS. 4 to 6 are cross-sectional views of each foam material used in the present invention. FIG. 2 is a cross-sectional view of a constructed body obtained by applying the shaping method according to the present invention. Each foam 2 shown in FIGS. 1 to 3 is used, and a coating film 1 is applied as shown in FIGS. 4 to 6 in order to smooth out the concavities on the surface of the foam 20.
〔実施例１〕
本発明の方法による平滑性を付与するために次のように
実施した。[Example 1] In order to impart smoothness by the method of the present invention, the following procedure was carried out.
まず第１図に示すように発泡材表面が比較的滑らかなで
凹みが少ないときには、酢酸セルロース８〜１２チの溶
液の場合粘度は、１〜４ポイズとなシスプレー塗装が可
能で塗膜も薄く均一に塗ることができ、得られた鋳物の
肌は、平滑であった。First, as shown in Figure 1, when the surface of the foam material is relatively smooth and there are few dents, a solution of cellulose acetate of 8 to 12 inches has a viscosity of 1 to 4 poise, making it possible to perform syspray painting, and the coating film is thin. It could be applied evenly, and the skin of the obtained casting was smooth.
〔実施例２〕
また、第２図に示すように、発泡材表面の凹みが浅くて
数が多い場合は、酢酸セルロース２０〜２５ＬＩＩの溶
液の場合は８０〜４００ボイ・ズの粘度となるため、ス
プレー塗布は不可能であるが、ヘフ塗りで均一の塗膜が
得られ、得られた鋳物の肌は平滑であった。[Example 2] Furthermore, as shown in Fig. 2, if the depressions on the surface of the foam material are shallow and numerous, the viscosity of a solution of cellulose acetate of 20 to 25 LII will be 80 to 400 Boise. Although spray coating is not possible, a uniform coating film was obtained by Hoef coating, and the skin of the obtained casting was smooth.
〔実施例３〕
さらに、第３図に示すように、発泡材表面の凹みが深い
場合は、酢酸セルロース１５〜２゜チの溶液に５〜２０
％のポリプロピレン粉末などを増量材として添加してヘ
ラで塗布すると、凹みがうめられて平滑となり、出来上
った鋳物の肌は平滑であった。[Example 3] Furthermore, as shown in Fig. 3, when the surface of the foam material has deep depressions, 5 to 20
% of polypropylene powder was added as an extender and applied with a spatula, the dents were filled and the surface of the finished casting was smooth.
本発明は、以上詳記したように、発泡材表面に酢酸セル
ロースの被膜を設けるものであるから、発泡材からなる
鋳型の表面を平滑にすることができ、その結果、鋳物の
肌が平滑な製品を得ることができる効果が生じ、付加価
値が向上する利点がある。As detailed above, the present invention provides a film of cellulose acetate on the surface of a foamed material, so that the surface of a mold made of a foamed material can be made smooth, and as a result, the skin of the casting is smooth. There is an advantage that the product can be obtained and the added value is improved.
第１図〜第６図は本発明の詳細な説明するための図であ
って、この内筒１〜３図は本発明で使用する各発泡材の
断面図であり、第４〜６図は本発明を適用して得られた
各施工体の断面図である。
復代理人 内 １） 明
復代理人 萩 原 亮 −
復代理人 安 西 篤 夫
第１図 第４図Figures 1 to 6 are diagrams for explaining the present invention in detail, and Figures 1 to 3 of the inner cylinder are cross-sectional views of each foam material used in the present invention, and Figures 4 to 6 are diagrams for explaining the present invention in detail. It is a sectional view of each construction object obtained by applying the present invention. Sub-Agents 1) Meifuku Agent Ryo Hagiwara - Sub-Agent Atsuo Anzai Figure 1 Figure 4
Claims (1)
い溶剤に酢酸セルロースを溶解させたもの又はこの溶液
とポリプロピレン、ポリエチレン、ポリスチレン粉末か
らなる配合物を被塗物の凹み面に塗布し、平滑にするこ
とを特徴とする発泡材よりなる鋳型整形方法。Apply cellulose acetate dissolved in a solvent that dissolves cellulose acetate but does not dissolve the foam mold, or a mixture of this solution and polypropylene, polyethylene, or polystyrene powder to the concave surface of the object to be coated and smooth it. A method for shaping a mold made of a foamed material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26058586A JPS63115645A (en) | 1986-11-04 | 1986-11-04 | Shaping method for casting mold consisting of foamed material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26058586A JPS63115645A (en) | 1986-11-04 | 1986-11-04 | Shaping method for casting mold consisting of foamed material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63115645A true JPS63115645A (en) | 1988-05-20 |
Family
ID=17349988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26058586A Pending JPS63115645A (en) | 1986-11-04 | 1986-11-04 | Shaping method for casting mold consisting of foamed material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63115645A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345052A (en) * | 1991-12-12 | 1994-09-06 | Nissan European Technology Centre Limited | Tool making |
-
1986
- 1986-11-04 JP JP26058586A patent/JPS63115645A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345052A (en) * | 1991-12-12 | 1994-09-06 | Nissan European Technology Centre Limited | Tool making |
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