JPH0349911A - Molding method for molded product of resin-impregnated fiber sheet - Google Patents
Molding method for molded product of resin-impregnated fiber sheetInfo
- Publication number
- JPH0349911A JPH0349911A JP18413989A JP18413989A JPH0349911A JP H0349911 A JPH0349911 A JP H0349911A JP 18413989 A JP18413989 A JP 18413989A JP 18413989 A JP18413989 A JP 18413989A JP H0349911 A JPH0349911 A JP H0349911A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- molded product
- mold
- glass mat
- resin
- 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.)
- Granted
Links
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、樹脂含浸１１ｉｌ！維シート（以下ｒｓＭＣ
」という）成形品の成形方法に係り、詳しくは金型上に
ＳＭＣとコンテニュアス・ストランド・ガラスマット（
以下「ガラスマットＪという）とを重ね合わせ、加熱加
圧するに当り、成形品の表面を補強するガラスマットの
ガラス切れやプレゲルをなくして外観品質の優れた成形
品を成形する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention provides resin-impregnated 11il! fiber sheet (hereinafter referred to as rsMC)
Regarding the molding method of the molded product (called "
The present invention relates to a method for forming molded products with excellent appearance quality by eliminating glass chips and pre-gels in the glass mats that reinforce the surface of the molded product by overlapping them with glass mat J and heating and pressurizing them. .
（従来技術とその課題）
従来、通常のＳＭＣとガラスマットを上下金型間にセッ
トし、加熱加圧成形する際は、その加圧速度を一定に規
制していた為に、成形に供するＳＭＣの熟成度合の振れ
等により、製品表面を補強するガラスマットが切断して
品質不良の原因になったり、逆に型締め完了前のゲル化
（硬化）により製品表面に欠損を生じて外観品質を損う
等のトラブルを生じ易いものであった。(Prior art and its problems) In the past, when ordinary SMC and glass mat were set between upper and lower molds and heated and pressure molded, the pressurization speed was regulated to a constant level. Due to fluctuations in the degree of ripening, the glass mat that reinforces the product surface may break, causing quality defects, or conversely, gelation (hardening) before mold clamping can cause defects on the product surface, impairing the appearance quality. It was easy to cause problems such as damage.
即ち、加圧速度を低速で一定に規制すると、ガラス切れ
は起きないが、型締め加圧前のゲル化現象（プレゲル）
を生じたり、逆に高速で一定に規制すると、プレゲルは
起きないかガラス切れを生ずる等の問題があった。In other words, if the pressurization speed is kept constant at a low speed, glass breakage will not occur, but gelation phenomenon (pre-gel) before mold clamping pressurization will occur.
On the other hand, if the speed is controlled to be constant at high speed, there are problems such as no pre-gelling or glass breakage.
（課題を解決するための手段）
本発明は上記課題を解決するものであり、その要旨は、
ガラス繊維に不飽和ポリエステル樹脂組成物を含浸して
なるＳＭＣと、コンテニュアス・ストランド・ガラスマ
ットとを、該ガラスマットが下敷となるように、下金型
上に重ね合わせて、加熱加圧成形するに際し、上金型が
上記ＳＭＣに接触してから上記樹脂組成物が上記ガラス
マットに含浸するまでの間、加圧速度を低速に設定し、
しかるのち硬化開始前に型内充填を完了するように加圧
速度を高速に切替え設定することを特徴とする樹脂含浸
繊維シート成形品の成形方法である。(Means for Solving the Problems) The present invention solves the above problems, and its gist is as follows:
SMC formed by impregnating glass fiber with an unsaturated polyester resin composition and a continuous strand glass mat are superimposed on a lower mold so that the glass mat serves as an underlay, and molded under heat and pressure. At this time, the pressurization speed is set at a low speed from the time the upper mold contacts the SMC until the resin composition impregnates the glass mat,
This method of molding a resin-impregnated fiber sheet molded article is characterized in that the pressurizing speed is then switched to a high speed so that the filling in the mold is completed before curing starts.
以下本発明を実施例により具体的に説明する。The present invention will be specifically explained below using examples.
第１図（イ）、（ロ）、（ハ）は本発明の成形過程を側
断面図で示し、第２図は、第１図の各成形過程における
金型内圧と加圧時間との関係をグラフで示す。Figures 1 (a), (b), and (c) show the molding process of the present invention in side sectional views, and Figure 2 shows the relationship between mold internal pressure and pressurization time in each molding process shown in Figure 1. is shown in a graph.
本発明で用いるＳＭＣは、下記に示す配合内容の樹脂組
成物７０重量％を、２５１ｕ１程度の長さに裁断したロ
ービングガラス繊維３０重量％に含浸してなるものであ
る。The SMC used in the present invention is obtained by impregnating 30% by weight of a roving glass fiber cut into a length of about 251 ul with 70% by weight of a resin composition having the composition shown below.
く配合内容〉
配合量（重量部）
不飽和ポリエステル樹脂・１旧・・・・・・１旧・・８
゜低収縮化樹脂（ポリスチレン溶液）・・・・旧・・２
゜触媒（ｔ−ブチル・パーベンゾエート）・・・１稀釈
剤（スチレンモノマー）・・・・旧・・・・・・・・・
・・２．５内部離型剤（ジンクステアレート）・１旧・
・２．５充填剤（炭酸カルシウム）・１旧・・・旧・・
・旧・・１２５増粘剤（酸化マグネシウム）・・・・・
・・旧・団・・・・ｏ、５一方、本発明で用いるガラス
マットは、連続ガラス繊維のマット状物で、ガラス繊維
の目付は量は３６０〜４５０ｇ／ｒｒ？範囲のものが好
適に用いられる。Blend content> Blend amount (parts by weight) Unsaturated polyester resin・1 old・・・1 old・8
゜Low shrinkage resin (polystyrene solution)...old...2
゜Catalyst (t-butyl perbenzoate)...1 Diluent (styrene monomer)...Old...
・・2.5 Internal mold release agent (zinc stearate)・1 Old・
・2.5 Filler (calcium carbonate) ・1 Old... Old...
・Old...125 thickener (magnesium oxide)...
...Old group...o, 5 On the other hand, the glass mat used in the present invention is a mat-like material of continuous glass fibers, and the basis weight of the glass fibers is 360 to 450 g/rr? Those within this range are preferably used.
第１図（イ）に示す如く、１３０”Ｃに設定した下金型
Ａ上に上記ガラスマット２を１枚置き、その上に上記５
ＭＣｌを３枚重ね、１４０″Ｃに設定した上金型Ｂを０
，１〜０．６ｎｍ／秒の低速で下降し、１０秒のち第１
図（ロ）に示す如く、５ＭＣｌが上金型Ｂに接触後も同
速度を保ち、第２図の内圧曲線ａに示す如く型締めを開
始する。As shown in FIG. 1 (a), place one sheet of the glass mat 2 on the lower mold A set at 130"C, and place the glass mat 2 on top of it.
Layer 3 sheets of MCl and set the upper mold B at 140″C to 0.
, descending at a low speed of 1 to 0.6 nm/sec, and after 10 seconds the first
As shown in Figure (B), the same speed is maintained even after 5MCl contacts the upper mold B, and mold clamping begins as shown in the internal pressure curve a in Figure 2.
上記型締め開始ののち、圧力が５〜２０ｋｔ／−範囲と
なったときの加圧速度変移点ｔ１から、速度を０．６〜
２．０ｒｏ＋／秒に高速設定する。After the start of mold clamping, the speed is increased from 0.6 to
Set the high speed to 2.0ro+/sec.
上記圧力及び速度は、５ＭＣｌの熟成度合により上記範
囲内で選択する。The above pressure and speed are selected within the above range depending on the degree of ripening of 5MCl.
しかるのち第１図（ハ）に示す如く、型締め設定圧力が
５０ｋｓｒ／ｄｌに到達したとき、該圧力を維持し、型
締め開始後５０秒以内の時間で硬化させ成形品３が得ら
れる。Thereafter, as shown in FIG. 1(c), when the mold clamping set pressure reaches 50 ksr/dl, this pressure is maintained and the molded product 3 is obtained by curing within 50 seconds from the start of mold clamping.
上記の如く、第１図（ロ）の状態、即ち５ＭＣｌに上金
型Ｂが接触してから、５ＭＣｌの樹脂組成物が第２図に
示す如く流動を開始する流動過程ｔに入り、型締め圧力
５０ｋｇ／−到達点から樹脂組成物が硬化を開始する硬
化過程ｔ２に入るが、上金型Ｂが５ＭＣｌに接触する流
動開始点ｔから硬化開始点ｔ２の中間に、加圧速度変移
点ｔ１を設ける。As described above, after the upper mold B comes into contact with 5MCl in the state shown in FIG. The resin composition begins to harden from the point where the pressure reaches 50 kg/-, entering the curing process t2, but a pressure speed transition point t1 occurs between the flow start point t where the upper mold B contacts 5MCl and the hardening start point t2. will be established.
流動開始点ｔから加圧速度変移点ｔ１間においては、加
圧速度を低速に設定することにより、ＳＭＣ１中の樹脂
組成物がガラスマット２に含浸されつつ緩やかに加圧さ
れるので、ガラスマット２のガラス切れを生ずることが
なく、また加圧速度変移点ｔ１より加圧速度を高速に設
定して、硬化開始前に型締め設定圧力まで上昇させるこ
とにより、得られる成形品３の表面には、ガラス切れや
プレゲルによる表面欠損等の外観不良を生ずることがな
くなるものである。Between the flow start point t and the pressurization speed transition point t1, by setting the pressurization speed to a low speed, the resin composition in the SMC 1 is impregnated into the glass mat 2 and is pressurized gently. By setting the pressurization speed higher than the pressurization speed transition point t1 and increasing the mold clamping pressure to the mold clamping setting pressure before the start of curing, the surface of the molded product 3 obtained is This eliminates appearance defects such as glass breakage and surface defects due to pre-gel.
（発明の効果） 本発明は、上記構成よりなるので下記効果を奏する。(Effect of the invention) Since the present invention has the above configuration, it has the following effects.
即ち、ＳＭＣとガラスマットを金型内に重ね合わせ、加
熱加圧成形するに当り、流動開始点と硬化開始点の中間
に、加圧速度変移点、即ち低速から高速への加圧速度の
切替え点を設けて、硬化開始前に型内充填を完了するよ
うにしたので、従来の如く加圧速度が終始定速の場合に
起り易い成形品表面のガラス切れやプレゲル等がなくな
り、外表面がガラスマット層で補強された外観品質の優
れた成形品が得られる。That is, when SMC and glass mat are superimposed in a mold and heated and pressed, there is a pressing speed transition point, that is, a switching of the pressing speed from low speed to high speed, between the flow start point and hardening start point. Since the filling in the mold is completed before the curing starts, glass breakage and pre-gelling on the surface of the molded product, which tend to occur when the pressurization speed is constant throughout, are eliminated, and the outer surface is A molded product with excellent appearance quality reinforced with a glass mat layer can be obtained.
第１図（イ）、（ロ）、（ハ）は本発明の成形過程を側
断面図で示し、第２図は、第１図の各成形過程における
金型内圧と加圧時間との関係をグラフで示す。Figures 1 (a), (b), and (c) show the molding process of the present invention in side sectional views, and Figure 2 shows the relationship between mold internal pressure and pressurization time in each molding process shown in Figure 1. is shown in a graph.
Claims (1)
なるＳＭＣと、コンテニュアス・ストランド・ガラスマ
ットとを、該ガラスマットが下敷となるように、下金型
上に重ね合わせて、加熱加圧成形するに際し、上金型が
上記ＳＭＣに接触してから上記樹脂組成物が上記ガラス
マットに含浸するまでの間、加圧速度を低速に設定し、
しかるのち硬化開始前に型内充填を完了するように加圧
速度を高速に切替え設定することを特徴とする樹脂含浸
繊維シート成形品の成形方法。SMC formed by impregnating glass fiber with an unsaturated polyester resin composition and a continuous strand glass mat are superimposed on a lower mold so that the glass mat serves as an underlay, and molded under heat and pressure. At this time, the pressurization speed is set at a low speed from the time the upper mold contacts the SMC until the resin composition impregnates the glass mat,
A method for molding a resin-impregnated fiber sheet molded product, characterized in that the pressurization speed is then switched to a high speed so that the filling in the mold is completed before curing starts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18413989A JP2820723B2 (en) | 1989-07-17 | 1989-07-17 | Molding method of resin impregnated fiber sheet molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18413989A JP2820723B2 (en) | 1989-07-17 | 1989-07-17 | Molding method of resin impregnated fiber sheet molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0349911A true JPH0349911A (en) | 1991-03-04 |
| JP2820723B2 JP2820723B2 (en) | 1998-11-05 |
Family
ID=16148054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18413989A Expired - Lifetime JP2820723B2 (en) | 1989-07-17 | 1989-07-17 | Molding method of resin impregnated fiber sheet molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2820723B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113927923A (en) * | 2021-10-18 | 2022-01-14 | 江诣 | Preparation method of glass fiber tent inserted pile |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4552379B2 (en) * | 2002-02-19 | 2010-09-29 | 株式会社セガ | game machine |
-
1989
- 1989-07-17 JP JP18413989A patent/JP2820723B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113927923A (en) * | 2021-10-18 | 2022-01-14 | 江诣 | Preparation method of glass fiber tent inserted pile |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2820723B2 (en) | 1998-11-05 |
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