JPH01258931A - Method of molding thermoplastic resin products - Google Patents
Method of molding thermoplastic resin productsInfo
- Publication number
- JPH01258931A JPH01258931A JP8679988A JP8679988A JPH01258931A JP H01258931 A JPH01258931 A JP H01258931A JP 8679988 A JP8679988 A JP 8679988A JP 8679988 A JP8679988 A JP 8679988A JP H01258931 A JPH01258931 A JP H01258931A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- resin plate
- cooling
- molding
- resin sheet
- 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
- 238000000034 method Methods 0.000 title claims description 15
- 229920005992 thermoplastic resin Polymers 0.000 title claims description 13
- 238000000465 moulding Methods 0.000 title abstract description 35
- 229920005989 resin Polymers 0.000 claims abstract description 46
- 239000011347 resin Substances 0.000 claims abstract description 46
- 238000001816 cooling Methods 0.000 claims abstract description 43
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims 1
- 239000000835 fiber Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 230000006866 deterioration Effects 0.000 abstract description 4
- 239000004696 Poly ether ether ketone Substances 0.000 description 4
- 229920002530 polyetherether ketone Polymers 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、熱可塑性樹脂の成形方法、とくに結晶性熱可
塑樹脂板の熱間成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for molding a thermoplastic resin, and particularly to a method for hot molding a crystalline thermoplastic resin plate.
ポリエーテルエーテルケトン（ＰＥＥＫ）などの結晶性
熱可塑樹脂板を曲面状にプレス成形することは従来から
試みられているが、十分に満足できる成果が得られてい
ない。この種の樹脂は、ある温度たとえばＰＥＥＫのば
あいには３４３℃以下の温度で成形すると割れを生じ、
３９０℃以上では、熱分解を生じて樹脂が変質する。ま
た成形後の冷却速度が低いと、結晶が粗大化して靭性が
損なわれるため冷却速度は所定値以上たとえば２０℃／
分以上でなければならない。Press molding of crystalline thermoplastic resin plates such as polyetheretherketone (PEEK) into curved shapes has been attempted in the past, but no fully satisfactory results have been obtained. This type of resin cracks when molded at a certain temperature, for example, 343°C or less in the case of PEEK.
At temperatures above 390°C, thermal decomposition occurs and the resin changes in quality. Also, if the cooling rate after molding is low, the crystals will become coarse and the toughness will be impaired, so the cooling rate should be at least a predetermined value, for example 20℃/
Must be at least 1 minute.
従来の成形方法においては、予熱炉中で成形温度以上に
予熱した樹脂板を冷間合型内へ移して成形する成性が行
なわれていたが、金型への空中移送中に成形可能温度以
下に樹脂板温度が低下して成形品に割れが生じ易く、割
れを防ぐため予熱温度を高めると樹脂の変質を招くとい
う問題があった。また、他の方法として、成形型内に加
熱流体を導いて成形型を成形温度以上に加熱し、この成
形型上で樹脂板を予熱したのち所要の成形を行い、成形
後に成形型内に水等の冷媒を導いて所要の冷却速度で樹
脂板を冷却することも知られている。In the conventional molding method, the resin plate was preheated in a preheating furnace to a temperature higher than the molding temperature, and then molded by transferring it into a cold mold. There is a problem in that the temperature of the resin plate decreases and cracks tend to occur in the molded product, and if the preheating temperature is increased to prevent cracking, the quality of the resin deteriorates. Another method is to heat the mold to a temperature higher than the molding temperature by introducing a heated fluid into the mold, preheat the resin plate on the mold, and then perform the required molding. It is also known to cool a resin plate at a required cooling rate by introducing a refrigerant such as .
しかし、この方法では、成形後の冷却に際しての冷媒の
流通を均−且つ急速にしないと温度むらを生じて製品に
反りを生じたり、部分的に靭性が不足した状態となる。However, in this method, if the refrigerant is not distributed evenly and rapidly during cooling after molding, temperature unevenness will occur, causing the product to warp or to partially lack toughness.
さらに、この方法は成形型に対して昇温と冷却を繰り返
すものであるので、エネルギの浪費が大きい、という問
題があった。Furthermore, since this method repeatedly heats and cools the mold, there is a problem in that a large amount of energy is wasted.
本発明は、結晶性熱可塑樹脂板の成形のための従来の方
法における製品に割れや反りや靭性の不足する部分を生
じる、という問題と、樹脂の変質を招いたり、エネルギ
の浪費が大きい、という問題を解決することを目的とす
る。The present invention solves the problems of conventional methods for molding crystalline thermoplastic resin sheets, which result in cracks, warpage, and insufficient toughness in the product, as well as deterioration of the resin and large waste of energy. The purpose is to solve the problem.
上記問題点を解決するため、本発明による方法は、成形
型内に成形すべき結晶性熱可塑樹脂板を挟んで成形温度
まで加熱し、成形型に挟んだままの樹脂板をコールドプ
レスに設けた冷やし型に移して該プレスにより□成形型
を押して樹脂板の成形を行い、冷やし型の吸熱により樹
脂板を所定の冷却速度で冷却することを特徴とする。成
形型は熱容量が小さいものとすることが好ましく、これ
に対して、冷やし型は熱容量の大きなものとすることが
好ましい。In order to solve the above problems, the method according to the present invention involves sandwiching a crystalline thermoplastic resin plate to be molded in a mold, heating it to the molding temperature, and placing the resin plate sandwiched between the molds in a cold press. The resin plate is molded by pressing the □ mold with the press, and the resin plate is cooled at a predetermined cooling rate by heat absorption by the cooling mold. The mold preferably has a small heat capacity, whereas the cooling mold preferably has a large heat capacity.
本発明においては、成形される樹脂板は、成形型に挟ん
だ状態で成形温度まで加熱され、そのままの状態でコー
ルドプレス内の冷やし型に移される。従って、予熱炉か
らプレス冷やし型までの移送中、樹脂板は上下両面に密
接した成形型によって保温されているので、温度が急速
に低下することなく成形温度範囲に維持される。そして
、該プレスにより冷やし型を介して成形型を押して樹脂
板を成形する。成形後は、そのままの状態を保持すると
、冷やし型が成形型および樹脂板から熱を奪うため、成
形された樹脂板は所定の冷却速度で冷却される。In the present invention, a resin plate to be molded is heated to a molding temperature while being sandwiched between molds, and then transferred as it is to a cooling mold in a cold press. Therefore, during the transfer from the preheating furnace to the press-cooling mold, the resin plate is kept warm by the molds that are in close contact with both the upper and lower surfaces, so that the temperature does not drop rapidly and is maintained within the molding temperature range. Then, the press presses the mold through the cooling mold to mold the resin plate. After molding, if the state is maintained as it is, the cooling mold takes away heat from the mold and the resin plate, so the molded resin plate is cooled at a predetermined cooling rate.
成形型の熱容量を小さくしておけば、成形型の昇温およ
び冷却によるエネルギの浪費は極力減少させることが可
能になる。また、冷やし型の熱容量を大きくすることに
より、冷やし型による吸熱量を大きくでき、−所望の冷
却速度を容易に達成でき、かつ樹脂板の冷却むらを防止
できる。If the heat capacity of the mold is kept small, it is possible to minimize the waste of energy due to heating and cooling of the mold. Furthermore, by increasing the heat capacity of the cooling mold, the amount of heat absorbed by the cooling mold can be increased, - a desired cooling rate can be easily achieved, and uneven cooling of the resin plate can be prevented.
本発明の一実施例を図について説明する。成形される樹
脂板１は、炭素繊維にＰＨＢＫのような結晶性熱可塑樹
脂を含浸させた構成であり、離型処理を施した成形型の
上型２と下型２′との間に挟んで配置される。出入口扉
４を有する赤外線加熱炉３のような予熱炉が設けられ、
樹脂板ｌと上皇２および下型２′との組み立て体は、ロ
ーラコンベア７に載せて炉３内に搬入される。炉３内で
は、樹脂板１と型２．２でか樹脂の成形温度まで加熱さ
れる。An embodiment of the present invention will be described with reference to the drawings. The resin plate 1 to be molded is made of carbon fiber impregnated with a crystalline thermoplastic resin such as PHBK, and is sandwiched between an upper mold 2 and a lower mold 2' of a mold that has been subjected to mold release treatment. It will be placed in A preheating furnace such as an infrared heating furnace 3 having an entrance/exit door 4 is provided,
The assembly of the resin plate 1, the upper mold 2 and the lower mold 2' is carried into the furnace 3 on a roller conveyor 7. In the furnace 3, the resin plate 1 and mold 2.2 are heated to the molding temperature of the resin.
加熱炉３に隣接して可動台５と固定台５′とからなるコ
ールドプレスが設けられ、該コールドプレスの可動台５
には冷やし型の上型６が、固定台５′には冷やし型の下
型６′がそれぞれ取りつけられている。コールドプレス
の固定台５′上にはローラコンベア７が炉３内から延長
して設けられる。A cold press consisting of a movable table 5 and a fixed table 5' is provided adjacent to the heating furnace 3, and the movable table 5 of the cold press
An upper mold 6 of the cooling mold is attached to the holder 5, and a lower mold 6' of the cooling mold is attached to the fixed base 5'. A roller conveyor 7 is provided on the fixed stand 5' of the cold press, extending from inside the furnace 3.
炉３内で成形温度まで加熱された樹脂板１と型２．２′
の組み立て体は、炉３の扉４を開いてローラコンベア７
により素早くコールドプレスに移される。コールドプレ
スの上型５および下型５′は、あらかじめ冷却しておく
。樹脂板１と型２．２′の組み立て体がコールドプレス
に移されると直ちに、該プレスの可動台５を下方に駆動
して冷やし型６．６′により型２．２′を互いに押しつ
け樹脂板を熱開成形する。成形後には、冷やし型は成形
型および樹脂板１から熱を急速に奪い、樹脂板１を所定
の冷却速度で冷却する。図に示すように、型２．２′は
比較的薄く形成されているため、熱容量が小さく、冷や
し型の上型６および下型６′は容積が大きいので熱容量
が大きく、したがって、樹脂板１の冷却は急速に行われ
る。厚さ３ミリのＰＥＥＫ板を厚さ３ミリのスチール製
成形型に挟んで３９０℃まで予熱した実験においては、
冷やし型の温度を１００℃とした場合でも３８℃／分と
十分な速度で冷却できた。その結果、成形される樹脂板
ｌの樹脂の結晶が粗大化することを防止できる。必要が
あれば、冷やし型の上型６および下型６′に冷媒を流通
させてもよい。このようにして成形され、冷却された樹
脂板１および型２．２′の組み立て体は、コールドプレ
スに隣接して設けられたローラコンベア８により搬出さ
れる。Resin plate 1 and mold 2.2' heated to molding temperature in furnace 3
The assembly is completed by opening the door 4 of the furnace 3 and moving the roller conveyor 7.
It is quickly transferred to cold press. The upper mold 5 and lower mold 5' of the cold press are cooled in advance. Immediately after the assembly of the resin plate 1 and the mold 2.2' is transferred to the cold press, the movable table 5 of the press is driven downward and the cold mold 6.6' presses the mold 2.2' against each other to form the resin plate. heat-open molded. After molding, the cooling mold rapidly removes heat from the mold and the resin plate 1, and cools the resin plate 1 at a predetermined cooling rate. As shown in the figure, the mold 2.2' is formed relatively thin and has a small heat capacity, and the upper mold 6 and lower mold 6' of the cooling mold have a large volume and therefore have a large heat capacity. cooling occurs rapidly. In an experiment in which a 3mm thick PEEK plate was sandwiched between 3mm thick steel molds and preheated to 390℃,
Even when the temperature of the cooling mold was set to 100°C, cooling was possible at a sufficient rate of 38°C/min. As a result, it is possible to prevent the resin crystals of the molded resin plate l from becoming coarse. If necessary, a refrigerant may be made to flow through the upper mold 6 and lower mold 6' of the cooling mold. The thus molded and cooled assembly of resin plate 1 and mold 2.2' is conveyed out by a roller conveyor 8 provided adjacent to the cold press.
以上述べたように、本発明においては、成形される樹脂
板を成形型に挟んで成形温度以上に加熱したのち、樹脂
板を成形型に挟んだ状態のままでコールドプレスに移し
、該コールドプレスに設けた冷やし型により成形型を押
して樹脂板の成形を行い、冷やし型の吸熱により成形さ
れた樹脂板を所定の冷却速度で冷却するので、冷却むら
を生じる恐れがなく、また、樹脂板は予熱炉からプレス
冷やし型までの移送中も成形型によって保温されて成形
温度範囲に保持されるので、成形温度を保持するため予
熱温度を高くし過ぎて樹脂の劣化を起こしたり逆に成形
温度以下に低下して割れを起こしたりする恐れがない。As described above, in the present invention, after the resin plate to be molded is sandwiched between the molds and heated to a temperature higher than the molding temperature, the resin plate is transferred to a cold press while being sandwiched between the molds, and the cold press is The resin plate is molded by pressing the mold with the cooling mold installed in the cooling mold, and the molded resin plate is cooled at a predetermined cooling rate by the heat absorption of the cooling mold, so there is no risk of uneven cooling, and the resin plate is During the transfer from the preheating furnace to the press cooling mold, the mold retains heat and maintains it within the molding temperature range, so in order to maintain the molding temperature, the preheating temperature may be set too high, causing deterioration of the resin, or conversely, it may drop below the molding temperature. There is no risk that the temperature will drop and cause cracks.
また、成形型面とその型面への熱伝達装置とを昇温およ
び冷却して行う従来の方法に比して、本発明の方法では
、成形型のみを加熱すればよいので、昇温および冷却の
ためのエネルギの浪費を少なくすることができる。Furthermore, compared to the conventional method in which the mold surface and a heat transfer device to the mold surface are heated and cooled, the method of the present invention requires heating only the mold. Wasted energy for cooling can be reduced.
成形型を熱容量の小さいものとし、冷やし型を熱容量の
おおきなものとすることにより、その効果を一層高める
ことができる。また成形型は、製品最終形状に仕上げら
れているため、冷やし型が接触すると同時に吸熱が始ま
るため十分な冷却速度を発揮するので、結晶性熱可塑樹
脂製品の場合であっても結晶粗大化による靭性劣化がな
い。The effect can be further enhanced by using a mold with a small heat capacity and a cooling mold with a large heat capacity. In addition, since the mold is finished in the final shape of the product, heat absorption begins as soon as the cooling mold comes into contact with the mold, so it exhibits a sufficient cooling rate. No deterioration in toughness.
図は本発明の方法を実施するための装置の一例を示す概
略図である。
１・・・・樹脂板、 ２．２′・・・・成形型、３・・
・・加熱炉、 ５．５′・・・・コールドプレス、６．
６′・・・・冷やし型。
手続補正書（方式）
１．事件の表示 昭和６３年特許願第８６７９９号
２、発明の名称 熱可塑性樹脂製品の成形方法３、
補正をする者
事件との関係 出願人
名称 （０９７）川崎重工業株式会社
４、代理人
５、補正命令の日付 昭和６３年６月２８日６、補正
の対象 （１）明細書の図面の簡単な説明の欄（
２）全図面
７、補正の内容The figure is a schematic diagram showing an example of an apparatus for carrying out the method of the present invention. 1...Resin plate, 2.2'...Mold, 3...
...Heating furnace, 5.5'...Cold press, 6.
6′・・・Chilled type. Procedural amendment (formality) 1. Indication of the case: Patent Application No. 86799 of 1986 2, Title of the invention: Method for molding thermoplastic resin products 3,
Person making the amendment Relationship to the case Applicant name (097) Kawasaki Heavy Industries Co., Ltd. 4, Agent 5, Date of amendment order June 28, 1988 6, Subject of amendment (1) Brief description of the drawings in the specification Description column (
2) All drawings 7, contents of amendments
Claims (4)
脂の軟化温度以上に予熱し、前記樹脂板を前記成形型に
挟んだままの状態でコールドプレスに設けた冷やし型に
移したのち、該プレスにより前記成形型を押して前記樹
脂板の成形を行い、前記冷やし型の吸熱により前記樹脂
板を冷却することを特徴とする、結晶性熱可塑樹脂板の
熱間成形方法。(1) A crystalline thermoplastic resin plate is sandwiched between molds and preheated to a temperature higher than the softening temperature of the resin, and the resin plate, while being sandwiched between the molds, is transferred to a cooling mold installed in a cold press. A method for hot forming a crystalline thermoplastic resin plate, characterized in that the resin plate is then molded by pressing the mold with the press, and the resin plate is cooled by heat absorption by the cooling mold.
間成形方法において、前記成形型は前記冷やし型に比し
熱容量が小さいことを特徴とする方法。(2) The method for hot forming a crystalline thermoplastic resin plate according to claim (1), wherein the forming mold has a smaller heat capacity than the cooling mold.
塑樹脂板の熱間成形方法において、前記冷やし型はあら
かじめ冷却してあることを特徴とする方法。(3) The method for hot forming a crystalline thermoplastic resin plate according to claim (1) or (2), wherein the cooling mold is cooled in advance.
方法において、前記樹脂板は結晶性熱可塑樹脂を含浸し
た繊維からなる複合材料により構成されたことを特徴と
する方法。(4) The method according to any one of claims (1) to (3), wherein the resin plate is made of a composite material made of fibers impregnated with a crystalline thermoplastic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8679988A JPH01258931A (en) | 1988-04-08 | 1988-04-08 | Method of molding thermoplastic resin products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8679988A JPH01258931A (en) | 1988-04-08 | 1988-04-08 | Method of molding thermoplastic resin products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01258931A true JPH01258931A (en) | 1989-10-16 |
| JPH0523578B2 JPH0523578B2 (en) | 1993-04-05 |
Family
ID=13896841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8679988A Granted JPH01258931A (en) | 1988-04-08 | 1988-04-08 | Method of molding thermoplastic resin products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01258931A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320096A (en) * | 2011-09-02 | 2012-01-18 | 宁波华业材料科技有限公司 | Forming die of thermoplastic sheet material |
| KR102338714B1 (en) * | 2020-10-21 | 2021-12-14 | 주식회사 서연이화 | Composite material and manufacturing method for the same and forming method of multi-layer structure using the same |
-
1988
- 1988-04-08 JP JP8679988A patent/JPH01258931A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320096A (en) * | 2011-09-02 | 2012-01-18 | 宁波华业材料科技有限公司 | Forming die of thermoplastic sheet material |
| KR102338714B1 (en) * | 2020-10-21 | 2021-12-14 | 주식회사 서연이화 | Composite material and manufacturing method for the same and forming method of multi-layer structure using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0523578B2 (en) | 1993-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5894419A (en) | Continuous press-forming method for resin sheet | |
| KR100357934B1 (en) | Press bending station for sheet glass bending | |
| JP2820499B2 (en) | Method and apparatus for forming thermoplastic material supplied in thin sheet form | |
| EP0335098B1 (en) | Compression molding of composite parts on hot mold surfaces with a short cycle time | |
| JPS6410168B2 (en) | ||
| AU631237B2 (en) | Process for producing panels or webs of laminated cellular thermoplastic material | |
| JPH01258931A (en) | Method of molding thermoplastic resin products | |
| US20080169583A1 (en) | Processing Method of Fine Structure and Processing Equipment for Fine Structure | |
| CN218985822U (en) | Adjustable and controllable thermoplastic composite material rapid forming system | |
| JPH0582283B2 (en) | ||
| US4957671A (en) | Manufacture of plastic products | |
| JP4065069B2 (en) | Method and apparatus for thermoforming press working | |
| CN113573898B (en) | Method for producing thin plate-like laminate having film-like resin layer | |
| KR101382180B1 (en) | Pre-heating device for hot stamping | |
| JPH06190912A (en) | Forming method for foamed polyethylene terephthalate sheet | |
| WO2023286759A1 (en) | Molding device and molding method | |
| SU1680646A1 (en) | Device for bending and annealing glass | |
| CN113573871B (en) | Apparatus for producing thin plate-like laminate having film-like resin layer | |
| TW201313627A (en) | Molding device and molding method for glass casings | |
| JPS63302007A (en) | Heating method for fiber reinforced thermoplastic resin sheet | |
| US2068361A (en) | Method of working moldable material | |
| JPH01299012A (en) | Compression molding method using insulating film | |
| CN115871247A (en) | Can regulate and control quick molding system of thermoplastic composite | |
| TWI667206B (en) | Heated heating field device under molded three-dimensional glass continuous forming device | |
| JPH01178418A (en) | Compression molding |