JPH0249900B2 - - Google Patents
Info
- Publication number
- JPH0249900B2 JPH0249900B2 JP59191157A JP19115784A JPH0249900B2 JP H0249900 B2 JPH0249900 B2 JP H0249900B2 JP 59191157 A JP59191157 A JP 59191157A JP 19115784 A JP19115784 A JP 19115784A JP H0249900 B2 JPH0249900 B2 JP H0249900B2
- Authority
- JP
- Japan
- Prior art keywords
- protective film
- synthetic resin
- resin layer
- article
- molding
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は発泡型材を使用した物品成型法に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of molding articles using foamed profiles.
従来例の構成とその問題点
従来、発泡型材を使用してFRP（繊維強化プラ
スチツク）製密閉タンクを成型する場合、発泡ウ
レタン製の型材が使用されているが、発泡ウレタ
ンだけを溶かす溶剤がなかつた。従つて、発泡ウ
レタンを使用してタンクを成型する場合、密閉タ
ンクを一度に成型できず、例えば胴部と鏡部とを
別々に成型し、後でこられを接合してタンクを製
造しており、従つて非常に手間を要するものであ
ると共に、複雑な形状のものには適用し得ないと
いう欠点があつた。Conventional structure and problems Conventionally, when molding a closed tank made of FRP (fiber-reinforced plastic) using a foam mold, a mold made of urethane foam is used, but there is no solvent that can dissolve only the urethane foam. Ta. Therefore, when molding a tank using urethane foam, it is not possible to mold the sealed tank all at once; for example, the body and mirror parts are molded separately and then joined together to manufacture the tank. Therefore, it is very time-consuming and has the disadvantage that it cannot be applied to objects with complicated shapes.
発明の目的
本発明は上記従来の欠点を解消する発泡型材を
使用した物品成型法を提供することを目的とす
る。OBJECTS OF THE INVENTION It is an object of the present invention to provide a method for molding articles using a foamed molding material, which eliminates the above-mentioned conventional drawbacks.
発明の構成
上記目的を達成するため、本発明の発泡型材を
使用した物品成型法は、発泡スチロールで物品の
型材を形成した後、該型材表面にポリビニールア
ルコール水溶液を塗布して保護膜を形成し、次に
上記保護膜の表面に合成樹脂層を形成し、その後
上記合成樹脂層及び保護膜を貫通する貫通穴を形
成し、次に上記貫通穴より内部にアセトンを注入
して発泡スチロールを溶解させると共に溶解した
発泡スチロールを取出し、その後合成樹脂層内面
の保護膜を水洗除去して所定の物品を成型する方
法である。Structure of the Invention In order to achieve the above object, the article molding method using the foamed molding material of the present invention involves forming the molding material of the article from expanded polystyrene, and then applying a polyvinyl alcohol aqueous solution to the surface of the molding material to form a protective film. Next, a synthetic resin layer is formed on the surface of the protective film, and then a through hole is formed that penetrates the synthetic resin layer and the protective film, and then acetone is injected into the inside through the through hole to dissolve the polystyrene foam. In this method, the dissolved polystyrene foam is taken out, and then the protective film on the inner surface of the synthetic resin layer is removed by washing with water, and a predetermined article is molded.
実施例と作用
以下、本発明の一実施例を図面に基づき説明す
る。本実施例では、密閉タンクの成型について説
明する。まず、第１図に示すように、発泡スチロ
ールにより所定のタンク形状をしたタンク型材１
を形成する。なお、タンク型材１のコーナ部の丸
み及び表面凹凸部はアイロン等によりなめらかに
される。次に、第２図に示すように、ポリビニー
ルアルコール（アセトンに溶けないが水には溶け
る性質を有し、且つ発泡スチロールになじみがよ
い性質を有している。）及び界面活性剤を含む水
溶液を、例えばスプレーガンによりタンク型材１
全表面に塗布して保護膜２を形成する。次に、第
３図に示すように、上記保護膜２の全周囲に、所
定厚さでもつてタンク本体となるFRP（繊維強化
プラスチツク）層（合成樹脂層の一例）３を形成
する。次に、第４図に示すように、FRP層３の
上部にしかも保護膜２まで貫通する貫通穴４を形
成すると共に、この貫通穴４内周面にもやはりポ
リビニールアルコール及び界面活性剤を含む水溶
液を塗布して同じ保護膜２を形成し、その後注入
管５を介してアセトンを内部に注入してタンク型
材１即ち発泡スチロールを溶解させる。この時、
FPR層３内周面はポリビニールアルコールを含
む保護膜２によつて保護されている。次に、第５
図に示すように、内部に吸込管６を降ろして溶解
した発泡スチロールをポンプ（図示せず）により
取出し、その後FRP層３内周面を水洗いして保
護膜２を除去する。そして、その後、第６図に示
すように、オーバレイにより蓋７をして貫通穴４
を塞げば、極めて容易に所定形状の密閉タンク８
を成型することができる。Embodiment and Operation An embodiment of the present invention will be described below based on the drawings. In this example, molding of a sealed tank will be explained. First, as shown in FIG.
form. Note that the rounded corners and surface irregularities of the tank-shaped material 1 are smoothed with an iron or the like. Next, as shown in Figure 2, an aqueous solution containing polyvinyl alcohol (insoluble in acetone but soluble in water, and compatible with expanded polystyrene) and a surfactant. For example, spray tank material 1 with a spray gun.
A protective film 2 is formed by coating the entire surface. Next, as shown in FIG. 3, an FRP (fiber-reinforced plastic) layer (an example of a synthetic resin layer) 3 is formed around the entire circumference of the protective film 2 to a predetermined thickness to form the tank body. Next, as shown in FIG. 4, a through hole 4 is formed in the upper part of the FRP layer 3 and penetrates to the protective film 2, and polyvinyl alcohol and a surfactant are also applied to the inner peripheral surface of the through hole 4. The same protective film 2 is formed by applying an aqueous solution containing the same, and then acetone is injected into the interior through the injection pipe 5 to dissolve the tank-shaped material 1, that is, the Styrofoam. At this time,
The inner peripheral surface of the FPR layer 3 is protected by a protective film 2 containing polyvinyl alcohol. Next, the fifth
As shown in the figure, a suction pipe 6 is lowered into the interior and the dissolved polystyrene foam is taken out using a pump (not shown), and then the inner peripheral surface of the FRP layer 3 is washed with water to remove the protective film 2. Then, as shown in FIG. 6, the lid 7 is covered with an overlay and the through hole 4 is
It is extremely easy to seal the tank 8 in a predetermined shape by blocking it.
can be molded.
なお、上記実施例においては、密閉タンクの成
型方法について説明したが、例えばFRP製船体、
浮き等の成型にも適用し得る。 In addition, in the above example, the method of molding a sealed tank was explained, but for example, a hull made of FRP,
It can also be applied to molding floats, etc.
発明の効果
上記本発明の物品成型法によると、発泡スチロ
ールで形成した物品の型材表面に、発泡スチロー
ルを溶解するアセトンに対しては溶けないが、水
に漸対しては溶けるポリビニールアルコールを含
む保護膜を形成し、そして次に保護膜の表面に合
成樹脂層を形成した後、アセトンで発泡スチロー
ルだけを溶解させ、次に水で保護膜を除去して所
定の物品を成型するので、従来のように、発泡ウ
レタンをそのまま取外す場合に比べて、物品の成
型作業が極めて容易になると共に、複雑な形状を
した物品の成型も容易となる。Effects of the Invention According to the article molding method of the present invention, a protective film containing polyvinyl alcohol that is insoluble in acetone, which dissolves expanded polystyrene, but gradually soluble in water, is formed on the surface of the mold material of an article made of expanded polystyrene. Then, after forming a synthetic resin layer on the surface of the protective film, only the styrofoam is dissolved in acetone, and then the protective film is removed with water and the desired product is molded. Compared to the case where the foamed urethane is removed as is, the molding work of the article becomes extremely easy, and it also becomes easier to mold the article with a complicated shape.
第１図〜第６図は本発明の成型方法を、タンク
の製造に適用した場合における全型手順を示す断
面図である。
１…タンク型材、２…保護膜、３…FRP層
（合成樹脂層）、４…貫通穴、５…注入管、６…吸
込管、７…蓋、８…密閉タンク。
1 to 6 are cross-sectional views showing the entire molding procedure when the molding method of the present invention is applied to manufacturing a tank. 1... Tank shape material, 2... Protective film, 3... FRP layer (synthetic resin layer), 4... Through hole, 5... Injection pipe, 6... Suction pipe, 7... Lid, 8... Sealed tank.
Claims (1)
該型材表面にポリビニールアルコール水溶液を塗
布して保護膜を形成し、次に上記保護膜の表面に
合成樹脂層を形成し、その後上記合成樹脂層及び
保護膜を貫通する貫通穴を形成し、次に上記貫通
穴より内部にアセトンを注入して発泡スチロール
を溶解させると共に溶解した発泡スチロールを取
出し、その後合成樹脂層内面の保護膜を水洗除去
して所定の物品を成型することを特徴とする発泡
型材を使用した物品成型法。1 After forming the shape of the article with Styrofoam,
Applying a polyvinyl alcohol aqueous solution to the surface of the mold material to form a protective film, then forming a synthetic resin layer on the surface of the protective film, and then forming a through hole that penetrates the synthetic resin layer and the protective film, Next, acetone is injected into the interior through the through hole to dissolve the styrene foam, and the dissolved styrene foam is taken out.Then, the protective film on the inner surface of the synthetic resin layer is removed by washing with water, and a predetermined article is molded. Article molding method using
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59191157A JPS6169436A (en) | 1984-09-11 | 1984-09-11 | Molding method of article using foaming mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59191157A JPS6169436A (en) | 1984-09-11 | 1984-09-11 | Molding method of article using foaming mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6169436A JPS6169436A (en) | 1986-04-10 |
| JPH0249900B2 true JPH0249900B2 (en) | 1990-10-31 |
Family
ID=16269850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59191157A Granted JPS6169436A (en) | 1984-09-11 | 1984-09-11 | Molding method of article using foaming mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6169436A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005056266A1 (en) * | 2003-12-12 | 2005-06-23 | Shonan Design Co., Ltd | Method for manufacturing hollow model |
| DE602005010105D1 (en) | 2005-12-20 | 2008-11-13 | Saab Ab | Method for producing an integral molded part of fiber-reinforced composite material and tool system for producing the same |
| FR2937278B1 (en) * | 2008-10-22 | 2013-02-08 | Eads Europ Aeronautic Defence | METHOD FOR PRODUCING HOLLOW SHAPE PIECES IN COMPOSITE MATERIAL |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5051758A (en) * | 1973-09-06 | 1975-05-08 | ||
| JPS5635791U (en) * | 1979-08-29 | 1981-04-07 |
-
1984
- 1984-09-11 JP JP59191157A patent/JPS6169436A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6169436A (en) | 1986-04-10 |
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