JPH05104573A - Resin injection molding method - Google Patents
Resin injection molding methodInfo
- Publication number
- JPH05104573A JPH05104573A JP3295080A JP29508091A JPH05104573A JP H05104573 A JPH05104573 A JP H05104573A JP 3295080 A JP3295080 A JP 3295080A JP 29508091 A JP29508091 A JP 29508091A JP H05104573 A JPH05104573 A JP H05104573A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding
- resin
- expansion bag
- mat
- 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
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、樹脂成形分野における
レジンインジェクション成形、いわゆるＲ・Ｉ法に関
し、特に成形型の一方に膨張袋を使用する樹脂注入成形
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to resin injection molding in the field of resin molding, the so-called RI method, and more particularly to a resin injection molding method using an expansion bag on one side of a molding die.
【０００２】[0002]
【従来の技術】従来、ＦＲＰを成形する一手段として、
Ｒ・Ｉ法が知られている。これは、別途成形したガラス
繊維等の、いわゆるプリフォ−ムマットを上型と下型と
の間に設置して金型を閉じ、金型を所定の圧力で締め付
けた後に金型キャビティに樹脂を注入し、プリフォ−ム
マットに含浸した樹脂を硬化して成形するものである。2. Description of the Related Art Conventionally, as one means for molding FRP,
The RI method is known. This is because a so-called preform mat, such as a separately molded glass fiber, is placed between the upper mold and the lower mold, the mold is closed, and the mold is clamped at a predetermined pressure, and then resin is injected into the mold cavity. Then, the resin impregnated in the preform mat is cured and molded.
【０００３】[0003]
【発明が解決しようとする課題】しかし、多品種の成形
にあっては、それぞれの上下の金型を備えなければなら
ず、しかも金型を調整する場合、上下の金型をそれぞれ
型合わせしなければならず、製品化までのリ−ドタイム
が長くなるものであった。また、製品の肉厚を変えるた
めには、上下左右の金型間の距離を修正することが必要
で、さらに成形中に樹脂材料の収縮が生じても、それに
追従して均一状に成形品を圧縮して表面精度を良好に維
持できるものでなかった。However, in the case of multi-product molding, upper and lower molds must be provided, and when adjusting the molds, the upper and lower molds must be matched with each other. It had to be done, and the lead time until commercialization was long. In addition, in order to change the thickness of the product, it is necessary to correct the distance between the upper, lower, left, and right dies, and even if the resin material shrinks during molding, the molded product will follow it uniformly. Was not able to maintain good surface accuracy.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記のような
点に鑑みたもので、上記の課題を解決するために、所定
形状とした成形型の雄型または雌型のいずれか一方に対
向して、上記雄型または雌型にそうように流体圧で膨張
させて雌型または雄型の代用となる膨張袋を配設し、上
記雄型または雌型と膨張袋との間にガラス繊維等の成形
用マットを装着し、膨張袋を流体圧で膨張させて成形用
マットを雄型または雌型にそわせるとともに、雄型また
は雌型と膨張袋との間に所定の樹脂を注入して上記成形
用マットに樹脂を含浸させて成形品を成形することを特
徴とする樹脂注入成形方法を提供するにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and in order to solve the above problems, one of a male mold and a female mold of a mold having a predetermined shape is used. Oppositely, an expansion bag which is a substitute for the female or male type by swelling with fluid pressure is disposed on the male or female type, and a glass is provided between the male or female type and the expansion bag. Attach a molding mat such as fiber, inflate the expansion bag with fluid pressure to divert the molding mat to the male or female mold, and inject a predetermined resin between the male or female mold and the expansion bag. Then, there is provided a resin injection molding method, characterized in that a molded article is molded by impregnating the molding mat with a resin.
【０００５】[0005]
【作用】本発明によれば、成形品の雄型または雌型のい
ずれか一方に、膨張させてそわせる膨張袋を対向するこ
とによって、成形型が雄型または雌型のいずれか一方で
よく、したがって型合わせも容易となるものである。According to the present invention, the molding die may be either a male mold or a female mold by facing an inflating bag for inflating the male mold or the female mold of the molded product. Therefore, the mold matching is also facilitated.
【０００６】また、膨張袋を流体圧で膨張させて成形用
マットを雄型または雌型にそわせ、対向する成形型との
間に樹脂を注入することによって、注入する樹脂に均一
状に圧力をかけられ、成形中に材料の収縮が生じても、
それに膨張袋を追従させて一定の圧力で成形品を圧縮で
き、表面精度の優れた成形品を得ることができる。さら
に、膨張袋の流体圧を加減し、樹脂の注入量を増減する
ことで、容易に成形品の肉厚を変えることもできる。Further, by inflating the inflatable bag with a fluid pressure so that the molding mat is aligned with the male mold or the female mold and injecting the resin between the opposing molding dies, the resin to be injected is uniformly pressed. Even if the material shrinks during molding,
The expansion bag can be made to follow it and the molded product can be compressed at a constant pressure, and a molded product with excellent surface accuracy can be obtained. Furthermore, the wall thickness of the molded product can be easily changed by adjusting the fluid pressure of the expansion bag and increasing or decreasing the amount of resin injected.
【０００７】[0007]
【実施例】以下、本発明を実施例にもとづいて説明す
る。図１、図２は、本発明の一実施例である。本発明の
樹脂成形装置１は、図１のように箱状の上固定枠２と下
固定枠３とをその周部でボルト、ナットの締付具４で結
合自在に形成している。EXAMPLES The present invention will now be described based on examples. 1 and 2 show an embodiment of the present invention. In the resin molding apparatus 1 of the present invention, as shown in FIG. 1, a box-shaped upper fixing frame 2 and a lower fixing frame 3 are formed so that they can be freely joined at their peripheral portions by bolts and nut tightening tools 4.
【０００８】上記上固定枠２には、図のように所定形状
に成形するための成形型の一方の雌型５を取り付け、そ
の中央部の樹脂注入口６から所定の樹脂を注入できるよ
うにしている。また、下固定枠３には、図のように所定
の肉厚の十分な強度を有して気密を保持する気密壁７を
内設し、その一側部に流体導入部８を設けて流体供給装
置９で空気や窒素ガス、温水等の流体を５０〜６０℃に
加熱して供給できるようにしている。As shown in the figure, one female mold 5 of a molding die for molding into a predetermined shape is attached to the upper fixed frame 2 so that a predetermined resin can be injected from a resin injection port 6 at the center thereof. ing. Further, as shown in the figure, the lower fixing frame 3 is internally provided with an airtight wall 7 having a predetermined wall thickness and having sufficient strength to maintain airtightness, and a fluid introducing portion 8 is provided on one side thereof to provide a fluid. A fluid such as air, nitrogen gas, or warm water is heated to 50 to 60 ° C. by the supply device 9 so that the fluid can be supplied.
【０００９】そして、これら上固定枠２と下固定枠３と
の間には、図１のように中央部が開孔した剛直なベ−ス
プレ−ト１０を介して耐熱性、弾力性を有する膨張袋１
１を装着し、上記した気密壁７内に流体導入部８から流
体を供給することによって膨張袋１１を膨らませ、上部
の雌型５にそわせるようにしている。膨張袋１１として
は、樹脂に反応せず、溶解や膨潤もしない耐熱ゴム材等
が使用される。気密壁７のまわりには、適宜に補強材１
２を設けているとともに、断熱材１３を装填している。Between the upper fixed frame 2 and the lower fixed frame 3, there is heat resistance and elasticity through a rigid base plate 10 having a central hole as shown in FIG. Inflatable bag 1
1 is mounted, and the expansion bag 11 is inflated by supplying a fluid from the fluid introducing portion 8 into the airtight wall 7 described above so as to conform to the upper female mold 5. As the expansion bag 11, a heat-resistant rubber material or the like that does not react with the resin and does not dissolve or swell is used. Around the airtight wall 7, a reinforcing material 1 is appropriately provided.
2 is provided and the heat insulating material 13 is loaded.
【００１０】上記した成形型の雌型５の端面には、図１
のようにエッジ状のピンチオフ部１４を周設し、注入す
る樹脂のシ−ルを行なえるようにしているとともに、ば
りができるだけ生じないようにしている。また、この成
形型には、図のように温水通路１５を配設していて、温
水供給管１６を介して温水を循環し、成形型を加熱した
り、保温できるようにしている。The end face of the female die 5 of the above-mentioned forming die is shown in FIG.
As described above, the edge-shaped pinch-off portion 14 is provided so that the injected resin can be sealed, and burrs are prevented as much as possible. In addition, a hot water passage 15 is provided in this molding die as shown in the drawing, and hot water is circulated through a hot water supply pipe 16 so that the molding die can be heated or kept warm.
【００１１】膨張袋１１の流体供給装置９は、図１のよ
うにコンプレッサ−（図示せず）等で所定容量の蓄圧タ
ンク１７に空気等の流体を２〜１０Kgf/cm2 に蓄圧し、
これをヒ−タ−１８で所定温度に加熱できるようにして
いる。そして、減圧弁１９を介して所定圧に調整し、逆
止弁２０、供給バルブ２１を介して気密壁７に供給する
ようにしている。２２は圧力計、２３は排出バルブ、２
４はリリ−フ弁である。As shown in FIG. 1, the fluid supply device 9 for the expansion bag 11 stores a fluid such as air in a pressure accumulating tank 17 having a predetermined capacity by a compressor (not shown) or the like at a pressure of 2 to 10 Kgf / cm 2 .
This can be heated by a heater 18 to a predetermined temperature. Then, the pressure is adjusted to a predetermined pressure via the pressure reducing valve 19 and is supplied to the airtight wall 7 via the check valve 20 and the supply valve 21. 22 is a pressure gauge, 23 is a discharge valve, 2
Reference numeral 4 is a relief valve.
【００１２】[0012]
【成形例】しかして、図２のように上固定枠２をはずし
て、下固定枠３の膨張袋１１上に所定寸法のガラス繊維
等の成形用マット２５を搭載し、上固定枠２を図１のよ
うに下固定枠３に締付具４で固定する。[Molding Example] However, as shown in FIG. 2, the upper fixing frame 2 is removed, the molding mat 25 of glass fiber or the like having a predetermined size is mounted on the expansion bag 11 of the lower fixing frame 3, and the upper fixing frame 2 is fixed. As shown in FIG. 1, it is fixed to the lower fixing frame 3 with a fastener 4.
【００１３】そして、液体供給装置９の供給バルブ２１
を開いて、気密壁７内に空気等の流体を供給すると、膨
張袋１１は図１のように上固定枠２の雌型５にそって膨
らみ、成形用マット２５を所定の形状に成形する。そこ
で、樹脂注入口６から所定の樹脂を注入すると、樹脂は
雌型５と膨張袋１１との間の成形用マット２５を通して
流入していく。樹脂を所定量注入して成形用マット２５
に含浸させ、気密壁７内の流体を所定の圧力に保持して
樹脂を加圧硬化して所定の形状に成形する。The supply valve 21 of the liquid supply device 9
And the fluid such as air is supplied into the airtight wall 7, the expansion bag 11 swells along the female mold 5 of the upper fixed frame 2 as shown in FIG. 1 to mold the molding mat 25 into a predetermined shape. .. Then, when a predetermined resin is injected from the resin injection port 6, the resin flows in through the molding mat 25 between the female mold 5 and the expansion bag 11. Molding mat 25 by injecting a predetermined amount of resin
Then, the fluid in the airtight wall 7 is kept at a predetermined pressure and the resin is pressure-cured to be molded into a predetermined shape.
【００１４】このようにして、所定の形状に成形品を成
形できると、流体供給装置９の排出バルブ２３を開けて
流体圧を下げ、締付具４を弛めて上固定枠２を取りはず
して成形品を取り出す。When the molded product can be molded into a predetermined shape in this way, the discharge valve 23 of the fluid supply device 9 is opened to reduce the fluid pressure, the fastener 4 is loosened, and the upper fixing frame 2 is removed. Take out the molded product.
【００１５】なお、実施例では、成形型として雌型につ
いて説明したが、雄型についても同様に行なえる。この
ように成形型は、上下型とも必要とすることなく、雄型
または雌型のいずれか一方のみで成形が行なえるもので
ある。したがって、型費の軽減化がはかれ、型合わせの
簡易化がはかれて、製品化までのリ−ドタイムを短縮す
ることができる。In the embodiment, the female mold is described as the molding mold, but the same can be applied to the male mold. As described above, the molding die does not need the upper and lower dies, and can be formed by only one of the male die and the female die. Therefore, the die cost can be reduced, the die matching can be simplified, and the lead time until commercialization can be shortened.
【００１６】また、膨張袋で成形型の一方の代用を行な
うので、成形中に材料の収縮が生じても、それに追従し
て一定の圧力で成形品を押圧でき、表面精度の優れた成
形品を成形することができる。さらにまた、樹脂注入口
からの樹脂の注入量を増減することにより、成形品の肉
厚を容易に変えられるので、所望の厚みのものを簡単に
成形することができる。Further, since the expansion bag substitutes one of the molds, even if the material contracts during molding, the molded product can be pressed with a constant pressure following the contraction, and the molded product with excellent surface accuracy. Can be molded. Furthermore, since the thickness of the molded product can be easily changed by increasing or decreasing the amount of resin injected from the resin injection port, it is possible to easily mold a product having a desired thickness.
【００１７】なお、上記では、膨張袋を膨張させて樹脂
を注入したが、膨張袋を２〜３Kgf/cm2 の流体圧で膨張
させた状態で樹脂を注入し、その後に膨張袋を８〜１０
Kgf/cm2 の所定の圧力まで膨張させて樹脂を流動充填
し、加圧硬化させることも容易にできる。この場合、樹
脂の注入抵抗が少なく、低圧の樹脂注入機でも短時間に
樹脂を注入できて好ましい。これらの操作は、低圧用、
高圧用の減圧弁を電磁弁で切り替えるなどして容易に自
動的に行なえるようにすることができる。In the above, the expansion bag was inflated to inject the resin. However, the expansion bag was inflated at a fluid pressure of 2 to 3 Kgf / cm 2 to inject the resin, and then the expansion bag was inflated to 8 to 8. 10
It is also possible to easily expand the resin to a predetermined pressure of Kgf / cm 2 , fluid-fill the resin, and press-cure it. In this case, it is preferable that the resin injection resistance is small and the resin can be injected in a short time even with a low-pressure resin injection machine. These operations are for low pressure,
The pressure reducing valve for high pressure can be easily and automatically changed by switching the solenoid valve.
【００１８】なお、厚肉の成形品が必要な場合には、成
形型の周部のピッチ部に所定厚のスペ−サ−を挿入し、
キャビティを樹脂で充満した後にさらに樹脂を圧入する
ことで容易に行なえる。When a thick molded product is required, a spacer having a predetermined thickness is inserted in the pitch part of the peripheral part of the molding die,
This can be easily done by filling the cavity with resin and then press-fitting the resin.
【００１９】また、実施例では、簡易な成形方法とし
て、下固定枠に上固定枠をボルト、ナットの締付具で締
め付けたが、油圧クランプ装置で脱着自在に締め付けた
り、下固定枠に上固定枠を押圧装置で押圧したりして締
め付けるなど生産量等に対応して適宜に行なうことがで
きる。Further, in the embodiment, as a simple forming method, the upper fixed frame is fastened to the lower fixed frame by the bolt and nut fasteners. The fixing frame can be appropriately pressed according to the production amount or the like by pressing the fixing frame with a pressing device or tightening.
【００２０】また、加圧流体としては、安価な空気が好
ましいが、窒素ガスや、その他の流体を利用することも
でき、成形型の加熱手段としても温水の他にバンドヒ−
タ−、その他の加熱、保温手段を使用することもでき
る。さらに、膨縮袋としては、シ−ト状のものを示した
が、袋状のものの中に流体を供給してもよく、またこれ
らは一重、二重とするなど耐久性、強度を鑑みて適宜に
行なえるものである。As the pressurized fluid, cheap air is preferable, but nitrogen gas or other fluids can be used, and the heating means of the mold is not limited to hot water but band heat.
It is also possible to use a heater or other heating and heat retaining means. Further, as the expansion and contraction bag, a sheet-like one is shown, but a fluid may be supplied into the bag-like one, and in consideration of durability and strength such as making them single or double. It can be done appropriately.
【００２１】なお、実施例では、シ−ト状の成形用マッ
トを膨張袋で所定の形状に成形するようにしているが、
一般に行なわれているように別途に成形したプリフォ−
ムマットを使用してもよい。In the embodiment, the sheet-shaped molding mat is molded into a predetermined shape with the expansion bag.
A preform molded separately as is commonly done
Mummats may be used.
【００２２】また、ガラス繊維等の成形用マットに予め
樹脂を一部または全体にわたって含浸した状態のプリプ
レグのものを、膨張袋上に搭載して加圧成形することも
可能である。Further, it is also possible to mount a prepreg of a molding mat such as glass fiber impregnated with a resin in whole or in advance on an inflatable bag for pressure molding.
【００２３】[0023]
【発明の効果】以上のように本発明にあっては、成形型
が雄型または雌型のいずれか一方のみでよく、そしてこ
れに膨張袋をそわせて強度の高い樹脂成形を行うことが
でき、型費の低減や型合わせの簡易化がはかれ、また樹
脂の注入量を増減すれば容易に成形品の肉厚を調整する
ことができるなど優れた効果を奏する。As described above, according to the present invention, only one of the male mold and the female mold is required as the molding die, and a high-strength resin molding can be performed by arranging an expansion bag on the molding die. Therefore, it is possible to reduce the mold cost and simplify the mold matching, and it is possible to easily adjust the wall thickness of the molded product by increasing or decreasing the injection amount of the resin.
【図１】本発明の一実施例の側断面図FIG. 1 is a side sectional view of an embodiment of the present invention.
【図２】同上の下固定枠部の側断面図。FIG. 2 is a side sectional view of the lower fixed frame portion of the above.
５…雌型（成形型） ６…樹脂注入口 ７…気
密壁 ８…流体導入部 １１…膨張袋 ２５…成
形用マット5 ... Female mold (molding die) 6 ... Resin injection port 7 ... Airtight wall 8 ... Fluid introduction part 11 ... Expansion bag 25 ... Molding mat
Claims (1)
のいずれか一方に対向して、上記雄型または雌型にそう
ように流体圧で膨張させて雌型または雄型の代用となる
膨張袋を配設し、 上記雄型または雌型と膨張袋との間にガラス繊維等の成
形用マットを装着し、膨張袋を流体圧で膨張させて成形
用マットを雄型または雌型にそわせるとともに、雄型ま
たは雌型と膨張袋との間に所定の樹脂を注入して上記成
形用マットに樹脂を含浸させて成形品を成形することを
特徴とする樹脂注入成形方法。1. A substitute for a female mold or a male mold by facing a male mold or a female mold of a mold having a predetermined shape and expanding the male mold or the female mold by fluid pressure in such a manner. And a molding mat made of glass fiber or the like is mounted between the male mold or the female mold and the expansion bag, and the expansion bag is expanded by fluid pressure to form the molding mat in the male mold or the female mold. A resin injection molding method, which comprises molding a molded product by injecting a predetermined resin between a male mold or a female mold and an expansion bag and impregnating the molding mat with the resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3295080A JP3053275B2 (en) | 1991-10-14 | 1991-10-14 | Resin injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3295080A JP3053275B2 (en) | 1991-10-14 | 1991-10-14 | Resin injection molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05104573A true JPH05104573A (en) | 1993-04-27 |
| JP3053275B2 JP3053275B2 (en) | 2000-06-19 |
Family
ID=17816059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3295080A Expired - Fee Related JP3053275B2 (en) | 1991-10-14 | 1991-10-14 | Resin injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3053275B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100231252B1 (en) * | 1994-07-30 | 1999-11-15 | 경주현 | Fibre reinforced plastic manufacturing and apparatus thereof |
| JP2006130875A (en) * | 2004-11-09 | 2006-05-25 | Toho Tenax Co Ltd | Inner pressure molding method |
| JP2009028939A (en) * | 2007-07-25 | 2009-02-12 | Toray Ind Inc | Rtm molding method |
| CN109719972A (en) * | 2019-01-26 | 2019-05-07 | 浙江理工大学 | A kind of resin injection device being used to prepare composite pipe and control method |
| KR102147858B1 (en) * | 2019-11-27 | 2020-08-25 | 주식회사 하드웍 | Composite material molding apparatus and molding method using the same |
-
1991
- 1991-10-14 JP JP3295080A patent/JP3053275B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100231252B1 (en) * | 1994-07-30 | 1999-11-15 | 경주현 | Fibre reinforced plastic manufacturing and apparatus thereof |
| JP2006130875A (en) * | 2004-11-09 | 2006-05-25 | Toho Tenax Co Ltd | Inner pressure molding method |
| JP2009028939A (en) * | 2007-07-25 | 2009-02-12 | Toray Ind Inc | Rtm molding method |
| CN109719972A (en) * | 2019-01-26 | 2019-05-07 | 浙江理工大学 | A kind of resin injection device being used to prepare composite pipe and control method |
| CN109719972B (en) * | 2019-01-26 | 2023-08-18 | 浙江理工大学 | Resin injection device for preparing composite pipe fitting and control method |
| KR102147858B1 (en) * | 2019-11-27 | 2020-08-25 | 주식회사 하드웍 | Composite material molding apparatus and molding method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3053275B2 (en) | 2000-06-19 |
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