JPS63268608A - Manufacture of synthetic resin molding - Google Patents
Manufacture of synthetic resin moldingInfo
- Publication number
- JPS63268608A JPS63268608A JP10395287A JP10395287A JPS63268608A JP S63268608 A JPS63268608 A JP S63268608A JP 10395287 A JP10395287 A JP 10395287A JP 10395287 A JP10395287 A JP 10395287A JP S63268608 A JPS63268608 A JP S63268608A
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- gas
- mold
- compression molding
- split mold
- 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.)
- Pending
Links
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 36
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000000465 moulding Methods 0.000 title abstract description 6
- 229920006337 unsaturated polyester resin Polymers 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 25
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 23
- 238000000748 compression moulding Methods 0.000 abstract description 16
- 230000007547 defect Effects 0.000 abstract description 9
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract description 5
- 239000005977 Ethylene Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 210000003660 reticulum Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、不飽和ポリエステル樹脂を主成分とする合成
樹脂素材を加熱状態で分割成形型により圧縮成形する合
成樹脂成形品の製造法に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for producing synthetic resin molded products by compression molding a synthetic resin material whose main component is unsaturated polyester resin using a split mold under heating. It is.
（従来技術）
従来、不飽和ポリエステルを基材とする樹脂混合物をガ
ラス繊維材に含浸させてなるシート状樹脂成形材料等を
分割成形型により加熱状態で圧縮成形することにより、
自動車のボンネットおよびトランクリッド等を形成する
ことが行なわれている。この成形法によれば、成形品の
デザイン自由度が拡大するとともに軽量化が可能である
というｉす点を有する反面、成形型内に封入された空気
もしくは上記ガラス繊維内に巻込まれた空気が成形品の
表面に付着してピンホール等の表面欠陥が形成されると
いう欠点がある。このような表面欠陥が形成された場合
、成形品の表面に焼付は塗装を施す際に塗膜の下面に気
泡が形成され、この気泡が膨張することにより塗膜が破
断されて外観が損われるという問題があった。(Prior art) Conventionally, sheet-shaped resin molding materials, etc., made by impregnating glass fiber material with a resin mixture based on unsaturated polyester, are compression-molded under heating using a split mold.
It is used to form automobile bonnets, trunk lids, etc. According to this molding method, the degree of freedom in the design of the molded product is expanded and the weight can be reduced, but on the other hand, the air sealed in the mold or the air trapped in the glass fiber It has the disadvantage that it adheres to the surface of the molded product, forming surface defects such as pinholes. If such surface defects are formed, baking will occur on the surface of the molded product.When painting is applied, air bubbles will form on the underside of the paint film, and as these air bubbles expand, the paint film will break and the appearance will be impaired. There was a problem.
上記ピンホールが形成されるのを防止するため、例えば
特開昭６１−２２９５１６号公報に示されるように、分
割成形型の内部を真空ポンプによって減圧して脱気しつ
つ圧縮成形を行なうようにしたものが知られている。し
かし上記構成では、分割成形型の内部を減圧状態に維持
するために両成彫型の接合部にシール部材を設ける必要
があり、構造が複雑になるとともに、上記シール部材を
設けたとしても確実なシール効果を得ることは困難であ
り、外部から空気が導入されるのを完全に阻止すること
はできず、上記ピンホールが形成されるのを避けること
ができないという問題があった。In order to prevent the formation of pinholes, compression molding is performed while depressurizing and deaerating the interior of the split mold using a vacuum pump, as shown in, for example, Japanese Patent Laid-Open No. 61-229516. What has been done is known. However, with the above configuration, it is necessary to provide a seal member at the joint between the two molds in order to maintain the interior of the split mold in a reduced pressure state, which complicates the structure, and even with the seal member provided, it is not reliable. There is a problem in that it is difficult to obtain a good sealing effect, it is impossible to completely prevent air from being introduced from the outside, and the formation of the pinholes is unavoidable.
〈発明の目的）
本発明は、上記問題点を解決するためになされたもので
あり、簡単な構成で分割成形型内の空気を確実に排出し
て成形品の表面にピンボールが形成されるのを効果的に
防止することができる合成樹脂成形品のｖＪ急造法提供
するものである。<Object of the Invention> The present invention has been made to solve the above-mentioned problems, and uses a simple configuration to reliably exhaust the air in the split mold and form pinballs on the surface of the molded product. This invention provides a vJ quick manufacturing method for synthetic resin molded products that can effectively prevent the above.
（発明の構成）
本発明は、不飽和ポリエステル樹脂を主成分とする合成
樹脂素材を加熱状態で分割成形型により圧縮成形する合
成樹脂成形品の製造法において、上記分割成形型を閉止
する際に、上記合成樹脂素材に溶解吸収され易いガスを
成形内に導入しつつ内部の空気を排出させた後、上記合
成樹脂素材を加熱状態で圧縮成形するものである。(Structure of the Invention) The present invention relates to a method for producing a synthetic resin molded product in which a synthetic resin material containing an unsaturated polyester resin as a main component is compression-molded using a split mold in a heated state, in which the split mold is closed. In this method, a gas that is easily dissolved and absorbed by the synthetic resin material is introduced into the molding chamber, while air inside the mold is discharged, and then the synthetic resin material is compression molded under heating.
上記の構成によれば、ピンホール等の発生原因となる成
形型内および合成樹脂素材内の空気が外部から導入され
たガスと置換され、このガスは圧縮成形時に合成樹脂素
材に溶解吸収されることとなる。According to the above configuration, the air inside the mold and the synthetic resin material, which causes pinholes, etc., is replaced with gas introduced from the outside, and this gas is dissolved and absorbed by the synthetic resin material during compression molding. It happens.
（実施例）
第１図は、本発明を実施するために使用する圧縮成形装
置の実施例を示している。上ｌ！ｃ！圧縮成形装置は、
接離自在に設置された上型１と下型２とからなる分割成
形型を有し、上型１に設けられた凹部３と、この凹部３
に対応して下型２に設けられた突部４との間に合成樹脂
素材５を圧縮成形する成形面が形成されている。(Example) FIG. 1 shows an example of a compression molding apparatus used to carry out the present invention. Upper l! c! Compression molding equipment is
It has a split mold consisting of an upper mold 1 and a lower mold 2 which are installed so as to be able to come into contact with and separate from it, and a recess 3 provided in the upper mold 1 and this recess 3.
A molding surface for compression molding the synthetic resin material 5 is formed between the protrusion 4 provided on the lower mold 2 in correspondence with the molding surface.
上記上型１には、図外のガス供給源から合成樹ｍｘ材５
に溶解吸収され易いスチレンガスまたは１チレンガス等
を導入するガス通路６が接続されている。このガス通路
６には、電ｍｒＭｍ式ベントパルプ７が配設されるとと
もに、スチレンまたはエチレン等を気化させるための加
熱装置（図示せず）が設けられている。また、上記下型
２の文部４の側壁には第２図に示すように、排気通路と
なる深さ０．１ａｕｇ＋程度の切欠溝８が形成されてい
る。The upper mold 1 is supplied with synthetic wood mx material 5 from a gas supply source (not shown).
A gas passage 6 is connected to introduce styrene gas, styrene gas, etc., which is easily dissolved and absorbed by the gas. This gas passage 6 is provided with an electric mrMm type vent pulp 7 and a heating device (not shown) for vaporizing styrene, ethylene, or the like. Further, as shown in FIG. 2, a notch groove 8 having a depth of about 0.1 AUg+ is formed to serve as an exhaust passage in the side wall of the text part 4 of the lower mold 2.
上記構成の圧縮成形装置を用いて本発明に係る合成ｍ脂
成形品の製造法を実施するには、先ず不飽和ポリニスア
ル樹脂を主成分とする合成樹脂素材５を下型２の突部４
の上面に載置する。上記合成樹脂素材５は、例えば不飽
和ポリエステル樹脂からなる基材と飽和ポリエステル樹
脂からなる低収縮材とが８０ ： ２０の割合で混合さ
れた１００手量部の主材に対し、下記の（Ａ）〜（Ｆ）
の成分が以下の割合で配分されることにより構成されて
いる。In order to carry out the method of manufacturing a synthetic resin molded product according to the present invention using the compression molding apparatus configured as described above, first, a synthetic resin material 5 containing an unsaturated polynisal resin as a main component is applied to the protrusion 4 of the lower mold 2.
Place it on the top surface. The synthetic resin material 5 is prepared by adding the following (A )～(F)
The components are distributed in the following proportions.
（Ａ）ＴＢＰ（ターシャリ−ブチルパーベンゾエイト）
からなる０、１垂部部の硬化触媒（Ｂ）ＰＢＱ （パー
ベンゾキュノン）からなる０、１重部部の安定剤
（Ｃ）炭酸カルシウムからなる１８０重量部の充填剤
（Ｄ）ｆｆｌ化マグネシウムからなる１重量部の増粘剤
（Ｅ）スチレンからなる５重階部の架橋剤（Ｆ）ガラス
繊維からなる２８重置部の補強副次に上型１を下降させ
、この上型１の凹部３の下辺部と下型２の突部４の上辺
部とが重なり合った時点で、ガス通路６のベントパルプ
７を開放して上記凹部３内にスチレンガスもしくはエチ
レンガス等を導入し、内部の空気を上記排気通路から外
部に排出させつつ上記凹部３内にスチレンガス等を充満
させる。この状態で上記上型１をさらに下降させ、上記
合成樹脂素材５を加熱しつつ圧縮成形を行なう。そして
、上記合成樹脂素材５が圧縮されてその一部がガス通路
６内に流入し、上記ベントバルブ７に到達した時点でス
チレンガス等の供給を停止して圧縮成形を終了する。(A) TBP (tertiary-butyl perbenzoate)
(B) 0.1 parts by weight of a curing catalyst consisting of (B) 0,1 parts by weight of a stabilizer consisting of PBQ (perbenzoqunon) (C) 180 parts by weight of a filler consisting of calcium carbonate (D) ffl conversion 1 part by weight thickener made of magnesium (E) 5-layer cross-linking agent made of styrene (F) Reinforcement of 28 layered parts made of glass fiber The upper mold 1 is lowered to the upper mold 1. When the lower side of the recess 3 and the upper side of the protrusion 4 of the lower mold 2 overlap, the vent pulp 7 of the gas passage 6 is opened to introduce styrene gas or ethylene gas into the recess 3, The recess 3 is filled with styrene gas or the like while discharging the internal air to the outside from the exhaust passage. In this state, the upper mold 1 is further lowered, and compression molding is performed while heating the synthetic resin material 5. Then, the synthetic resin material 5 is compressed and a part of it flows into the gas passage 6, and when it reaches the vent valve 7, the supply of styrene gas etc. is stopped and the compression molding is completed.
このように、成形型１．２内にスチレンガス等を導入し
、内部の空気をスチレンガスもしくはエチレンガス等と
置換した状態で合成樹脂素材５を圧縮成形を行なうよう
に構成したため、複雑なシール構造を採用することなく
、外部から空気が流入するのを確実に阻止することがで
きる。従って成形品の表面にピンホール等の表面欠陥が
発生するのを効果的に防止することができる。上記成形
型１．２内に導入されたガスは、不飽和ポリエステル樹
脂等と反応して合成樹脂素材５に溶解吸収され易い性質
を有しており、圧縮成形時に上記ガスが合成樹脂素材５
内に溶は込んで速やかに吸収されるため、ピンホール等
の原因となる気泡が形成されることはなく、その表面を
平滑に形成することができる。・
上記製造法によって合成樹脂素材５を圧縮成形して６０
０ｘ８００ｘ３ （顛）のテストピースを成形し、その
表面に形成されたピンホール等の表面欠陥の個数を調査
したところ、第３図に示すような試験結果が得られた。In this way, styrene gas or the like is introduced into the mold 1.2, and the synthetic resin material 5 is compression molded while the air inside is replaced with styrene gas or ethylene gas, thereby creating a complex seal. It is possible to reliably prevent air from flowing in from the outside without adopting any structure. Therefore, it is possible to effectively prevent surface defects such as pinholes from occurring on the surface of the molded product. The gas introduced into the mold 1.2 has a property of reacting with unsaturated polyester resin etc. and being easily dissolved and absorbed into the synthetic resin material 5.
Since the melt penetrates and is quickly absorbed, bubbles that cause pinholes and the like are not formed, and the surface can be made smooth.・ Compression mold the synthetic resin material 5 using the above manufacturing method to obtain 60
When a test piece of 0x800x3 (size) was molded and the number of surface defects such as pinholes formed on its surface was investigated, test results as shown in FIG. 3 were obtained.
すなわち、スチレンガス等の導入量を種々に変化させて
試験を行なった結果、上記ガスの導入量を増大させるに
伴い表面欠陥の個数が徐々に減少し、−分間当りの上記
ガスの導入量をテストピースの体積の約３倍に相当する
４ ５ Ｑ ／ｇａｉｎよりも大きくするように設定し
た場合にはほとんど欠陥が生じないことが確認された。That is, as a result of conducting tests with various amounts of styrene gas introduced, the number of surface defects gradually decreased as the amount of introduced gas increased, and the amount of introduced gas per minute decreased. It was confirmed that almost no defects occurred when the gain was set to be larger than 4 5 Q /gain, which corresponds to about three times the volume of the test piece.
なお、本発明に係る合成樹脂成形品の製造法は、上記ガ
ラス繊維強化合成樹脂材を素材とするシート材圧縮成形
法に限定されず、不飽和ポリエステル樹脂、を主成分と
する合成樹脂素材を圧縮成形する種々の製造法に適用可
能である。Note that the method for producing synthetic resin molded products according to the present invention is not limited to the sheet material compression molding method using the above-mentioned glass fiber-reinforced synthetic resin material as a raw material, but may also be performed using a synthetic resin material whose main component is unsaturated polyester resin. It is applicable to various manufacturing methods including compression molding.
（発明の効果）
以上説明したように本発明は、不飽和ポリエステル樹脂
を主成分とする合成樹ｍＪｌｃ材を分割成形型により圧
縮成形する合成樹脂成形品の製造法において、上記分割
成形型を閉止する際にその内部に、上記合成樹脂素材５
に溶解吸収され易いスチレンガスまたはエチレンガス等
を導入しつつ、ピンホール等の発生原因となる空気を外
部に排出さ諒た状態で圧縮成形を行なうように構成した
ため、複雑なシール構造を採用することなく、外部から
の空気の流入を確実に防止することができ、簡単な構成
で合成樹脂成形品にピンホール等の表面欠陥が形成され
るのを効果的に防止できるという利点がある。(Effects of the Invention) As explained above, the present invention provides a method for manufacturing a synthetic resin molded product in which a synthetic resin mJlc material whose main component is unsaturated polyester resin is compression molded using a split mold, in which the split mold is closed. When doing so, the synthetic resin material 5 is placed inside it.
Compression molding is performed in a state where styrene gas or ethylene gas, which is easily dissolved and absorbed by gas, is introduced, while air, which can cause pinholes, etc., is exhausted to the outside, making it possible to use a complex seal structure. This has the advantage that it is possible to reliably prevent air from entering from the outside without causing any damage, and that it is possible to effectively prevent surface defects such as pinholes from being formed in a synthetic resin molded product with a simple configuration.
第１図は本発明の製造法を実施するために使用する圧縮
成形＠置の実施例を示す概略構成図、第２図は下型の構
成を示す部分斜視図、第３図は本発明の製造法による試
験ＩＰＩｆＪＡを示すグラフである。
１・・・上型（分ｖ１成形型）、２・・・下型（分割成
形型）、５・・・合成樹脂素４４５゜
特許出願人 マ ツ ダ 株式会社代 理 人
弁理士 小谷悦司同 弁理
士 長１）正向 弁理士 板谷康
夫第 １ 図
ら
第 ２ 図Fig. 1 is a schematic configuration diagram showing an example of a compression molding @place used to carry out the manufacturing method of the present invention, Fig. 2 is a partial perspective view showing the structure of the lower mold, and Fig. 3 is a It is a graph showing test IPIfJA according to the manufacturing method. 1...Upper mold (minute v1 mold), 2...Lower mold (divided mold), 5...Synthetic resin element 445° Patent applicant Mazda Co., Ltd. Representative Patent attorney Etsushi Kotani Patent Attorney Chief 1) Masamukai Patent Attorney Yasuo Itaya Figure 1 Figure 2
Claims (1)
材を加熱状態で分割成形型により圧縮成形する合成樹脂
成形品の製造法において、上記分割成形型を閉止する際
に、上記合成樹脂素材に溶解吸収され易いガスを成形型
内に導入しつつ内部の空気を排出させた後、上記合成樹
脂素材を加熱状態で圧縮成形することを特徴とする合成
樹脂成形品の製造法。1. In a method for producing synthetic resin molded products in which a synthetic resin material whose main component is unsaturated polyester resin is compression-molded using a split mold in a heated state, when the split mold is closed, the synthetic resin material is melted into the synthetic resin material. A method for producing a synthetic resin molded article, which comprises introducing an easily absorbed gas into a mold while expelling the air inside the mold, and then compressing the synthetic resin material in a heated state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10395287A JPS63268608A (en) | 1987-04-27 | 1987-04-27 | Manufacture of synthetic resin molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10395287A JPS63268608A (en) | 1987-04-27 | 1987-04-27 | Manufacture of synthetic resin molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63268608A true JPS63268608A (en) | 1988-11-07 |
Family
ID=14367753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10395287A Pending JPS63268608A (en) | 1987-04-27 | 1987-04-27 | Manufacture of synthetic resin molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63268608A (en) |
-
1987
- 1987-04-27 JP JP10395287A patent/JPS63268608A/en active Pending
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