JPH0646647Y2 - FRP resin type - Google Patents
FRP resin typeInfo
- Publication number
- JPH0646647Y2 JPH0646647Y2 JP1988097965U JP9796588U JPH0646647Y2 JP H0646647 Y2 JPH0646647 Y2 JP H0646647Y2 JP 1988097965 U JP1988097965 U JP 1988097965U JP 9796588 U JP9796588 U JP 9796588U JP H0646647 Y2 JPH0646647 Y2 JP H0646647Y2
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- frp
- resin mold
- frp resin
- carbon
- 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
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、急速加熱することができる面状発熱体がFRP
樹脂型内部に埋設されてなるFRP樹脂型に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention provides a planar heating element that can rapidly heat FRP.
The present invention relates to an FRP resin mold embedded inside a resin mold.
従来、FRP成形において、例えば、ハンドレイアップや
スプレーアップ成形法のようなオープンモールドには、
FRP樹脂型が用いられている。このFRP樹脂型は、表面を
ゲルコート処理したガラス繊維マットやガラス繊維クロ
スをポリエステル樹脂にて賦形したものが一般的であ
る。Conventionally, in FRP molding, for example, for open mold such as hand lay-up or spray-up molding method,
FRP resin type is used. This FRP resin mold is generally a glass fiber mat or glass fiber cloth whose surface is gel-coated, which is shaped with a polyester resin.
オープンモールド成形では、このFRP樹脂型の上にガラ
ス繊維マットやガラス繊維クロスを配置し、ポリエステ
ル樹脂等の熱硬化性樹脂を含浸せしめ、硬化、賦形をし
ている。In open molding, a glass fiber mat or glass fiber cloth is placed on this FRP resin mold, and a thermosetting resin such as a polyester resin is impregnated to cure and shape it.
しかし、前記したFRP樹脂型は、それ自体発熱する機能
を有していないため、通常の場合、室温にて樹脂の硬化
を行うことが多い。このため、特に寒冷期においては、
樹脂の硬化に長時間を要するという問題があった。ま
た、このFRP樹脂型を用いて成形された成形品は、見掛
上は硬化しているように見えるが、完全硬化には至って
ない場合があり、しばしば品質上で問題が発生している
のが実状である。However, the above-mentioned FRP resin mold does not have a function of generating heat by itself, and therefore, in general, the resin is often cured at room temperature. Therefore, especially in the cold season,
There is a problem that it takes a long time to cure the resin. In addition, although the molded product molded using this FRP resin mold seems to be cured apparently, it may not be completely cured, which often causes a problem in quality. Is the actual situation.
前記した問題点を解決するため、硬化炉の中に加熱硬化
されるべき成形品をFRP樹脂型ごと投入し、加熱硬化す
る方法が行われている。しかし、この場合、高価な硬化
炉を必要とするのみならず、特に成形品が大型化するに
したがい、硬化炉への移動が困難となり、かつ、硬化も
容易ではなかった。In order to solve the above-mentioned problems, a method in which a molded product to be heat-cured is put into a curing furnace together with an FRP resin mold and heat-cured is used. However, in this case, not only an expensive curing furnace is required, but also because the molded product becomes large, it is difficult to move to the curing furnace, and the curing is not easy.
また、これら問題点を解決するため、炭素繊維長繊維を
集束させたもの、織布、マットなどを発熱体としてFRP
型内に内蔵する方法が考案されている。しかし、炭素繊
維長繊維を集束させたものを発熱体として立体状のFRP
樹脂型に用いた場合、集束した繊維の部分と集束した繊
維のない部分が生じたり集束密度が不均一な状態を生じ
て、発熱ムラを生じるために成形品の不均一な硬化を生
ずる。In addition, in order to solve these problems, FRP is used as a heating element with a bundle of long carbon fibers, woven fabric, mat, etc.
A method of incorporating it in a mold has been devised. However, the three-dimensional FRP is made by using a bundle of long carbon fibers as a heating element.
When it is used in a resin mold, a part of the fibers that are bundled and a part without the fibers that are bundled are generated, or a state in which the density of the bundles is not uniform occurs, and uneven heat is generated, resulting in uneven curing of the molded product.
同じく、炭素繊維の長繊維を織布、マットなどを発熱体
としてFRP型に用いた場合、織布では、繊維の重なった
部分と重なっていない部分に通電密度ムラを生じる欠点
があり、マットでは紙のように目付を均一とすることは
工業的に困難であるため通電ムラを生じる欠点があり、
そのため何れの場合も加熱時の温度ムラが生じる。Similarly, when a long fiber of carbon fiber is used for the FRP type as a woven cloth and a mat as a heating element, the woven cloth has a drawback that uneven current density occurs in a portion where fibers overlap and a portion where fibers do not overlap. Since it is industrially difficult to make the basis weight uniform like paper, there is a drawback that uneven power distribution occurs.
Therefore, in any case, temperature unevenness occurs during heating.
そこで本考案は上記した問題点を解決し、均一加熱する
ことができ、温度ムラの生じないFRP樹脂型を提供する
ことを目的とする。Therefore, an object of the present invention is to solve the above-mentioned problems and to provide an FRP resin mold capable of uniform heating and free from temperature unevenness.
本考案は、つぎの構成からなっている。 The present invention has the following configuration.
すなわち、繊維長１〜50mmで且つ炭素繊維自体の炭素含
有量が75〜89％である炭素繊維の短繊維のみを抄紙した
紙からなる面状発熱体がFRP樹脂型内部に埋設されてい
ることを特徴とするFRP樹脂型である。That is, a planar heating element made of paper made from only short fibers of carbon fibers having a fiber length of 1 to 50 mm and a carbon content of the carbon fibers themselves of 75 to 89% is embedded in the FRP resin mold. Is a FRP resin type.
本考案における炭素繊維は、アクリロニトリル系繊維、
ピッチ系繊維、レーヨン系繊維等を原料として既知の方
法で得られるものを指し、これを通常の意味で用いる。The carbon fiber in the present invention is an acrylonitrile fiber,
It refers to a fiber obtained by a known method using a pitch fiber, rayon fiber, or the like as a raw material, and this is used in the ordinary meaning.
特に、本考案においては、炭素含有量が75〜89％の炭素
繊維を用いることが必要である。Particularly, in the present invention, it is necessary to use carbon fibers having a carbon content of 75 to 89%.
その理由は、炭素含有量が75％より低いと発熱効率が劣
り、また、89％より高いと炭素繊維の比抵抗が低くなり
発熱体としての使用が困難となると同時に、89％より高
いと、炭素繊維を発熱体とした場合に温度の上昇と共に
導電率が高くなる（または、比抵抗が減少する）という
現象がみられなくなり、このような発熱体では昇温速度
が遅くなり、急速加熱ができないからである。The reason is that if the carbon content is lower than 75%, the heat generation efficiency is poor, and if it is higher than 89%, the specific resistance of the carbon fiber is low, making it difficult to use as a heating element. When carbon fiber is used as a heating element, the phenomenon that the conductivity becomes higher (or the specific resistance decreases) as the temperature rises is no longer observed. With such a heating element, the rate of temperature rise becomes slow and rapid heating does not occur. Because you can't.
このような炭素繊維は、繊維長１〜50mmとした短繊維の
みを紙にした発熱体として使用される。Such carbon fibers are used as a heating element in which only short fibers having a fiber length of 1 to 50 mm are used as paper.
このものは、繊維方向としては等方性であり、樹脂型を
均質に加熱するのに好適である。発熱素子の面積抵抗値
は、使用温度、寸法、形状等により適宜選択されるが、
樹脂型として形成に必要な温度を得るためには１〜1000
0Ω/sqのものが好ましい。This is isotropic in the fiber direction and is suitable for uniformly heating the resin mold. The sheet resistance value of the heating element is appropriately selected depending on the operating temperature, size, shape, etc.
1-1000 to obtain the temperature required for molding as a resin mold
It is preferably 0 Ω / sq.
本考案の実施例を図面によって説明する。 An embodiment of the present invention will be described with reference to the drawings.
第１図はFRP樹脂型の斜視図、第２図は第１図Ａ−Ａ′
の断面図である。樹脂型の表面は、ゲルコート層１から
なり、ガラス繊維マットやガラス繊維クロスからなるFR
P樹脂型基材2,3の間に、繊維長１〜50mmで且つ炭素含有
量が75〜89％の炭素繊維の短繊維を抄紙して製造された
炭素繊維からなる面状発熱体４が埋設されている。面状
発熱体４の両端に銅箔、銀ペースト等の電極材５を配
し、通電し発熱させる。場合によっては、温度検知セン
サー６をFRP樹脂型内部に埋設させ面状発熱体４の温度
制御を行うこともできる。FIG. 1 is a perspective view of the FRP resin mold, and FIG. 2 is FIG. 1 A-A '.
FIG. The surface of the resin mold is made of gel coat layer 1 and made of glass fiber mat or glass fiber FR
Between the P resin type base materials 2 and 3, a planar heating element 4 made of carbon fibers produced by making short fibers of carbon fibers having a fiber length of 1 to 50 mm and a carbon content of 75 to 89% is provided. It is buried. Electrode materials 5 such as copper foil and silver paste are arranged on both ends of the sheet heating element 4 and are energized to generate heat. In some cases, the temperature detection sensor 6 may be embedded in the FRP resin mold to control the temperature of the sheet heating element 4.
本考案にかかるFRP樹脂型においては、面状発熱体に使
用する炭素繊維の炭素含有量が75〜89％であるので、一
般に炭素繊維と言われているものの炭素含有量（93〜10
0％）に比べて、大幅にその炭素含有量が少ない。この
ような炭素含有量の違いにより、本考案のFRP樹脂型に
使用される面状発熱体は、通電すると面状発熱体の温度
が上がるに従って導電率が増加し、そのため通常の炭素
繊維の炭素含有率93〜100％のものに比べて昇温速度が
早く、急速にFRP樹脂型の温度が上昇するという効果を
有する。このため、成形に要する時間を短縮でき生産性
を高める利点がある。In the FRP resin mold according to the present invention, since the carbon content of the carbon fiber used for the sheet heating element is 75 to 89%, the carbon content of what is generally called carbon fiber (93 to 10
0%), the carbon content is significantly lower. Due to such a difference in carbon content, the planar heating element used in the FRP resin mold of the present invention has an increased conductivity as the temperature of the planar heating element rises when electricity is applied, and therefore the carbon of ordinary carbon fiber is used. It has an effect that the rate of temperature rise is faster than that of the content of 93 to 100%, and the temperature of the FRP resin mold rises rapidly. Therefore, there is an advantage that the time required for molding can be shortened and productivity can be increased.
本考案に係るFRP樹脂型は繊維長１〜50mmで且つ炭素繊
維の短繊維を主体とした紙からなる面状発熱体を樹脂型
内部に有するため、面状発熱体自体の目付が均一でかつ
その繊維方向が等方性であり、したがって、発熱が極め
て均一であり、このFRP樹脂型を用いて製造した製品の
仕上りが非常に良好である。The FRP resin mold according to the present invention has a sheet-shaped heating element consisting of paper mainly composed of short fibers of carbon fiber having a fiber length of 1 to 50 mm, and therefore the sheet-shaped heating element itself has a uniform basis weight. The fiber direction is isotropic, therefore the heat generation is extremely uniform, and the finished product produced using this FRP resin mold is very good.
第１図は本考案の一例を示すFRP樹脂型の斜視図、第２
図は第１図Ａ−Ａ′断面図を示す。 第２図において、1:ゲルコート層、2,3:FRP樹脂型基
材、4:繊維長１〜50mmで且つ炭素含有量が75〜89％の炭
素繊維の短繊維を抄紙して製造された炭素繊維のみから
なる面状発熱体、5:電極材、6:温度検知センサーであ
る。FIG. 1 is a perspective view of an FRP resin mold showing an example of the present invention, and FIG.
The figure shows a sectional view taken along the line AA 'in FIG. In FIG. 2, 1: gel coat layer, 2, 3: FRP resin type base material, 4: fiber length 1-50 mm and carbon content 75-89% short fibers of carbon fiber were manufactured by papermaking A sheet heating element made of only carbon fiber, 5: electrode material, and 6: temperature detection sensor.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭50−132064（ＪＰ，Ａ) 特開 昭62−160681（ＪＰ，Ａ) 実開 昭51−126364（ＪＰ，Ｕ) 大谷杉郎「炭素繊維をめぐって」（昭46 −２−１）（株）高分子市場研究所Ｐ. 177−178 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-50-132064 (JP, A) JP-A-62-160681 (JP, A) Actual development Sho-51-126364 (JP, U) Shiro Otani "Carbon Fibers "(Sho 46-2-1) Polymer Market Research Institute Co., Ltd. P. 177-178
Claims (1)
含有量が75〜89％である炭素繊維の短繊維のみを抄紙し
た紙からなる面状発熱体がFRP樹脂型内部に埋設されて
いることを特徴とするFRP樹脂型。1. A planar heating element made of paper made only from short fibers of carbon fibers having a fiber length of 1 to 50 mm and a carbon content of 75 to 89% is embedded in an FRP resin mold. FRP resin type that is characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988097965U JPH0646647Y2 (en) | 1988-07-26 | 1988-07-26 | FRP resin type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988097965U JPH0646647Y2 (en) | 1988-07-26 | 1988-07-26 | FRP resin type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0219510U JPH0219510U (en) | 1990-02-08 |
| JPH0646647Y2 true JPH0646647Y2 (en) | 1994-11-30 |
Family
ID=31323811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988097965U Expired - Lifetime JPH0646647Y2 (en) | 1988-07-26 | 1988-07-26 | FRP resin type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0646647Y2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50132064A (en) * | 1974-04-08 | 1975-10-18 | ||
| JPS51126364U (en) * | 1975-04-04 | 1976-10-13 | ||
| JPS62160681A (en) * | 1985-12-31 | 1987-07-16 | 株式会社 原田産業 | Carbon fiber panel heater material and manufacture of the same |
-
1988
- 1988-07-26 JP JP1988097965U patent/JPH0646647Y2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 大谷杉郎「炭素繊維をめぐって」（昭４６−２−１）（株）高分子市場研究所Ｐ．１７７−１７８ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0219510U (en) | 1990-02-08 |
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