JPS6056604B2 - Filled thermoplastic resin injection molded product - Google Patents
Filled thermoplastic resin injection molded productInfo
- Publication number
- JPS6056604B2 JPS6056604B2 JP54015423A JP1542379A JPS6056604B2 JP S6056604 B2 JPS6056604 B2 JP S6056604B2 JP 54015423 A JP54015423 A JP 54015423A JP 1542379 A JP1542379 A JP 1542379A JP S6056604 B2 JPS6056604 B2 JP S6056604B2
- Authority
- JP
- Japan
- Prior art keywords
- molded product
- thermoplastic resin
- mold
- injection molded
- 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.)
- Expired
Links
- 229920005992 thermoplastic resin Polymers 0.000 title claims description 48
- 238000002347 injection Methods 0.000 title claims description 40
- 239000007924 injection Substances 0.000 title claims description 40
- 239000000945 filler Substances 0.000 claims description 19
- 238000001746 injection moulding Methods 0.000 claims description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 9
- 229910052709 silver Inorganic materials 0.000 claims description 9
- 239000004332 silver Substances 0.000 claims description 9
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 description 19
- 239000011347 resin Substances 0.000 description 19
- 239000003365 glass fiber Substances 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 15
- 239000010410 layer Substances 0.000 description 15
- 238000000465 moulding Methods 0.000 description 9
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 229920001893 acrylonitrile styrene Polymers 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 3
- 239000002344 surface layer 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
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- BZDKYAZTCWRUDZ-UHFFFAOYSA-N buta-1,3-diene;methyl 2-methylprop-2-enoate;prop-2-enenitrile;styrene Chemical compound C=CC=C.C=CC#N.COC(=O)C(C)=C.C=CC1=CC=CC=C1 BZDKYAZTCWRUDZ-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000879 optical micrograph Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
- Laminated Bodies (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明はやわらかで高度の光沢をもつ外観良好な充填
材入り熱可塑性樹脂射出成形品に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filled thermoplastic resin injection molded article that is soft, highly glossy, and has a good appearance.
ガラス繊維をはじめ無機質や金属粉等を充填材とした
各種充填材入り熱可塑性樹脂射出成形品は充填材が入ら
ない成形品に比較し、引張強さ、曲げ強さ、曲げ弾性率
、耐熱性、寸法安定性等が改善され有用な材料として自
動車部品や電機用品の部品として使用されてきた。Thermoplastic resin injection molded products containing various fillers such as glass fiber, inorganic materials, metal powder, etc. have better tensile strength, bending strength, flexural modulus, and heat resistance than molded products without fillers. As a useful material with improved dimensional stability etc., it has been used as parts for automobile parts and electrical appliances.
一方熱可塑性樹脂はその可塑性を利用、加熱流動化、付
形、冷却固化の手順で成形品を作つていたが前述の充填
材は流動性がないため充填材入り熱可塑性樹脂成形品は
成形品表面の肌荒れがひどく外観の美しさを要求上ッ
1 ^警−゛lh卜hl−レ1−L゛ 1を利用し内部
構造部品にのみ使用されることが多い。 これら成形品
の製法は、一般的に熱可塑性樹脂成形品の射出成形にお
いては熱可塑性樹脂の可塑性を利用、換言すればスクリ
ュー等を利用熱可塑性樹脂を加熱流動化、付形し然るの
ち金型内で冷却固化することにより成形品を得ることを
基本原理としている。On the other hand, thermoplastic resin molded products were made by utilizing its plasticity and using the steps of heating fluidization, shaping, and cooling solidification, but since the filler mentioned above does not have fluidity, thermoplastic resin molded products containing filled materials are molded. The surface of the product is severely rough and the beauty of the exterior is required.
1 is often used only for internal structural parts. The manufacturing method of these molded products generally utilizes the plasticity of the thermoplastic resin in injection molding of thermoplastic resin molded products, in other words, uses a screw etc. to heat and fluidize the thermoplastic resin, shape it, and then mold it. The basic principle is to obtain a molded product by cooling and solidifying within the mold.
すなわち、固化後、成形品を金型より離型、取り出すた
めには該充填材入り熱可塑性樹脂の加熱変形温度より冷
却し金型外に取り出す、そのため一般的に金型は加熱変
形温度より低く保持する。更に生産性を上げるために結
露寸前の温度まで冷媒を利用金型を冷却することが行な
われる。すなわち、現在行なわれている射出成形におい
ては金型を冷却し、溶融樹脂の温度等で加熱、蓄熱する
場合でも、原理上金型温度は充填材入り熱可塑性樹脂の
加熱変形温度を上まわらない様に制御し成形する。この
ため金型表面と熱可塑性樹脂及び充填材が接触するとそ
の接触面て熱可塑性樹脂が急速に冷却され熱可塑性樹脂
の流動性が著しく乏しくなるため金型表面に熱可塑性樹
脂の密着が悪く、成形品表面の凸凹が激しい。また充填
材と熱可塑性樹脂は総じて相溶性が良くないため充填材
と熱可塑性樹脂の界面に微少な空隙ができこれを射出成
形した場合シルバーストリークになると考えられる。す
なわち、射出成形品の表面に充填材が現出し凸凹が激し
く、シルバーストリーク等が有つて光沢の劣るいわゆる
外観が良くない射出成形品しか得られない。熱可塑性樹
脂を外観の美しさを要求される射出成形品として利用す
る場合は、塗装する、フィルムを貼付ける等の他薄膜材
料を該充填材入り熱可塑性樹脂成形品の表面に付着する
方法が採用されている。In other words, in order to release and take out the molded product from the mold after solidification, it is cooled below the heating deformation temperature of the filled thermoplastic resin and taken out of the mold.Therefore, the mold is generally kept at a temperature lower than the heating deformation temperature. Hold. In order to further increase productivity, a refrigerant is used to cool the mold to a temperature on the verge of condensation. In other words, in the current injection molding process, even when the mold is cooled and heated and stored at the temperature of the molten resin, the mold temperature does not, in principle, exceed the heating deformation temperature of the filled thermoplastic resin. control and shape. For this reason, when the mold surface contacts the thermoplastic resin and the filler, the thermoplastic resin is rapidly cooled at the contact surface, and the fluidity of the thermoplastic resin becomes extremely poor, resulting in poor adhesion of the thermoplastic resin to the mold surface. The surface of the molded product is extremely uneven. Furthermore, since fillers and thermoplastic resins generally do not have good compatibility, it is thought that fine voids are formed at the interface between the filler and thermoplastic resins, resulting in silver streaks when injection molding is performed. In other words, the filler material appears on the surface of the injection molded product, making it extremely uneven and having silver streaks and the like, resulting in an injection molded product with poor gloss and poor appearance. When using a thermoplastic resin as an injection molded product that requires a beautiful appearance, there are other methods such as painting, pasting a film, or attaching a thin film material to the surface of the filled thermoplastic resin molded product. It has been adopted.
しかし、熱可塑性樹脂本来のやわらかい光沢を有する外
観の成形品を得ることが出来ず、またその製作に手間が
かかるので高価になる等の欠点を有する。塗装の場合は
塗膜を形成させるために熱可塑性樹脂を溶かすため衝撃
強さ等の機械的強さが減少する。またフィルムを貼付け
る場合も射出成形品形状が複雑な場合は成形品全面を覆
うは工業生産上不可能に近い。本発明者達は充填材入り
熱可塑性樹脂射出成形品表面に充填材が露出していない
熱可塑性樹脂の薄膜表皮層を射出成形時に一体的に形成
させることにより、成形品表面に熱可塑性樹脂本来の光
沢を有し、フローマーク、シルバーストリーク等の外観
不良現象のない、良好な外観を有する充填材入り熱可塑
性樹脂射出成形品を得、前述の問題点を解決した。However, this method has the disadvantage that it is not possible to obtain a molded product with a soft glossy appearance inherent to thermoplastic resins, and that it is expensive because it takes time and effort to manufacture. In the case of painting, mechanical strength such as impact strength is reduced because the thermoplastic resin is melted to form a paint film. Also, when applying a film, if the shape of the injection molded product is complex, it is almost impossible to cover the entire surface of the molded product in terms of industrial production. The present inventors have discovered that by integrally forming a thin skin layer of thermoplastic resin without exposed filler on the surface of a filled thermoplastic resin injection molded product during injection molding, the thermoplastic resin is naturally present on the surface of the molded product. The above-mentioned problems were solved by obtaining a filled thermoplastic resin injection molded product having a high gloss and a good appearance without defective appearance phenomena such as flow marks and silver streaks.
本発明は充填材入り熱可塑性樹脂成形品であつて、該成
形品の表面には充填材を含まない厚さ1〜100μの表
面の滑らかな熱可塑性樹脂の表皮層が実質的に接合界面
を有さず射出成形時に一体的に成形されてなり、該成形
品表面がASTMD523に規定される入射角60度に
おける光沢度Gs一(60に)%が80以上の光沢を有
しフローマーク、シルバーストリークのない充填材入り
熱可塑性樹脂射出成形品である。The present invention is a filled thermoplastic resin molded article, and the surface of the molded article has a smooth thermoplastic resin skin layer with a thickness of 1 to 100 μm that does not contain filler and substantially covers the bonding interface. Flow Mark, Silver It is a filled thermoplastic resin injection molded product with no streaks.
この熱可塑性樹脂表皮層が1μ以下では充填材が表面に
現出しやすく外観は光沢等いわゆる滑らかな外観でなく
なりやすい。.また、100μ以上の表皮層は必要でな
く、1000μ以上になつてくると充填材添加の効果が
減少する。この熱可塑性樹脂表皮層は拡大倍率44@の
光学顕微鏡の観察においても外観不良原因であるガーサ
ガサした凹凸のない滑らかな表面をもつている。If the thermoplastic resin skin layer is less than 1 μm, the filler tends to appear on the surface and the appearance tends to lose its so-called smooth appearance such as gloss. .. Further, it is not necessary to have a skin layer of 100 μm or more, and when the skin layer becomes 1000 μm or more, the effect of adding a filler decreases. This thermoplastic resin skin layer has a smooth surface without any roughness or unevenness that causes poor appearance even when observed using an optical microscope at a magnification of 44@.
更にこの表皮層は成形品の表面に光沢度Qs(60に)
%が80%以上の高度の光沢を与える程滑らかなもので
あり、射出成形品に高度であるばかりでなくやわらかな
光沢を与える。このような厚さ1〜100μの表皮層構
造を有するためはじめて充填材入り熱可塑性樹脂射出成
形品の非常な欠点である充填材の表面への現出および、
シルバーストリークやフローマーク等の射出成形品の充
填材入り熱可塑性樹脂の流れ及び流れムラに起因する外
観上の不良現象のない高度な光沢をもち外観の優れた熱
可塑性樹脂射出成形品が得られる。本発明の射出成形品
を得るための方法は次の通“りである。樹脂と金型の密
着を良くするためには金型表面を充填材入り熱可塑性樹
脂の加熱変形温度以上に保持することにより可塑性を保
持したまま成形する。一方、金型の表面を充填材入り熱
可塑性樹脂の加熱変形温度以上に保持したまま金型より
離型するは不可能であり変型のない所望の成形品を得る
ためには該金型を冷却し成形品の温度が熱可塑性樹脂の
加熱変形温度より低温に冷却、固化させた状態で金型よ
り離型する。この加熱、冷却には高周波誘導加熱の原理
を利用、金型の表層部を選択的に加熱することにより、
金型表面を急加熱急冷却する事により本発明の射出成形
品が得られる。次に本発明になる射出成形品とその成形
方法を図面をまじえ説明する。Furthermore, this skin layer has a gloss level of Qs (60) on the surface of the molded product.
% is smooth enough to give a high gloss of 80% or more, and it gives injection molded products not only a high gloss but also a soft gloss. Because it has such a skin layer structure with a thickness of 1 to 100 μm, filler material appears on the surface, which is a major drawback of filled thermoplastic resin injection molded products, and
Thermoplastic resin injection molded products with high gloss and excellent appearance can be obtained without defects in appearance caused by flow and uneven flow of filled thermoplastic resin in injection molded products such as Silver Streak and Flow Mark. . The method for obtaining the injection molded product of the present invention is as follows.In order to improve the adhesion between the resin and the mold, the mold surface is maintained at a temperature higher than the heating deformation temperature of the filled thermoplastic resin. On the other hand, it is impossible to release the mold while keeping the surface of the mold at a temperature higher than the heating deformation temperature of the filled thermoplastic resin, and it is impossible to obtain the desired molded product without deformation. In order to obtain this, the mold is cooled to a temperature lower than the heating deformation temperature of the thermoplastic resin, and the molded product is released from the mold in a solidified state.High-frequency induction heating is used for this heating and cooling. Utilizing the principle, by selectively heating the surface layer of the mold,
The injection molded product of the present invention can be obtained by rapidly heating and rapidly cooling the surface of the mold. Next, the injection molded product according to the present invention and its molding method will be explained with reference to the drawings.
充填材入り熱可塑性樹脂の射出成形において、第1図に
示す様に固定側金型と移動側金型の中間に高周波誘導加
熱のインダクターを設置する。In injection molding of filled thermoplastic resin, a high-frequency induction heating inductor is installed between a stationary mold and a movable mold as shown in FIG.
移動側金型と固定側金型との間にインダクターをはさみ
こみ、はさみこまれた状態で高周波を発振させたところ
第2図に示すように金型表面(A点やB点)のみ急激に
温度が上昇し、金型内部(C点やD点)の温度は高周波
誘導加熱によつてはほとんど温度上昇がほとんどないこ
とが確認できる。第2図の例の場合は金型の冷却水によ
る冷却は行なつておらず、単純に高周波誘導加熱による
金型の温度分布の経時変化の例を示したものである。し
かるのちに金型を一度開きインダクターを固定側及び移
動側金型の間より抜き出し再度金型を閉じ通常の射出成
形と同じ要領て充填材入り熱可塑性樹脂を射出成形した
ところ目的とする外観の美しい充填材入り熱可塑性樹脂
射出成形品を得た。充填材入り熱可塑性樹脂としてガラ
ス繊維強化アクリロニトリル−スチレン共重合樹脂(ア
クリロニトリル−スチレン共重合樹脂を以下AS樹脂と
略す)の本発明になる射出成形品を得た。この成形品の
厚さ方向の切断面の光学顕微鏡写真を第3図、第4図に
示す。倍率は44皓である、参考のため同一金型で金型
温度60℃で同材料を射出成形し、同断面を同様に写真
をとつたのが第5図と第6図である。倍率は44@であ
る。いずれの写真も島模様部はガラス繊維であり、横一
線のラインは成形品表面である。第3図、第4図と第5
図、第6図を比較しても明らかな様に本発明になる射出
成形品の場合充填材ガラス繊維が射出成形品表面に現出
することはなく、少なくても1〜30pの該熱可塑性樹
脂層が成形品表層部に形成されていることがわかる。When an inductor was sandwiched between the movable mold and the stationary mold and a high frequency was oscillated while the inductor was sandwiched, the temperature of only the mold surface (points A and B) suddenly increased as shown in Figure 2. It can be confirmed that the temperature inside the mold (point C and point D) increases almost no temperature due to high-frequency induction heating. In the case of the example shown in FIG. 2, the mold is not cooled with cooling water, but simply shows an example of the change over time in the temperature distribution of the mold due to high-frequency induction heating. After that, the mold was opened once, the inductor was extracted from between the fixed and movable molds, the mold was closed again, and the filled thermoplastic resin was injected in the same manner as normal injection molding, resulting in the desired appearance. A beautiful filled thermoplastic resin injection molded product was obtained. An injection molded article according to the present invention was obtained using a glass fiber-reinforced acrylonitrile-styrene copolymer resin (acrylonitrile-styrene copolymer resin is hereinafter abbreviated as AS resin) as a filled thermoplastic resin. Optical micrographs of the cross section of this molded article in the thickness direction are shown in FIGS. 3 and 4. The magnification is 44 mm. For reference, the same material was injection molded using the same mold at a mold temperature of 60° C., and photographs of the same cross section were taken in the same manner as shown in FIGS. 5 and 6. The magnification is 44@. In both photos, the island pattern is made of glass fiber, and the horizontal line is the surface of the molded product. Figures 3, 4 and 5
As is clear from comparing Figures 6 and 6, in the case of the injection molded product of the present invention, filler glass fibers do not appear on the surface of the injection molded product, and at least 1 to 30 p of the thermoplastic It can be seen that the resin layer is formed on the surface layer of the molded product.
また、第3図、第4図に示す様にガラス繊維が成形品表
面に比較的近い位置に有る時も熱可塑性樹脂層か表皮層
を形成すると同時にガラス繊維の影響で表皮層に若干の
凸凹を形成しても第6図の場合と比較しなだらかな凸凹
を示すため光沢のある外観を有する射出成形品を得る。
一方通常の射出成形品の場合第5図、第6図に示す様に
ガラス繊維が成形品表面に突き出ていたり、またガラス
繊維が表層近くにある場合には金型表面での樹脂の流れ
が疎外されるためか表面にシルバーストリーク状の凸凹
が出来、いわゆる光沢のないガサガサした表面の成形品
しか得ることはできない。本発明になる前述のガラス繊
維強化AS樹脂製射出成形品の外観の良さ、光沢度を定
量化するためASTMD523により成形品の光沢度G
s(600)%を測定した結果98%であつた。Also, as shown in Figures 3 and 4, when the glass fibers are located relatively close to the surface of the molded product, the thermoplastic resin layer or skin layer is formed, and at the same time the skin layer becomes slightly uneven due to the influence of the glass fibers. 6, an injection molded product having a glossy appearance can be obtained because it shows gentle unevenness compared to the case shown in FIG.
On the other hand, in the case of normal injection molded products, as shown in Figures 5 and 6, if the glass fibers protrude from the surface of the molded product, or if the glass fibers are located near the surface layer, the flow of resin on the mold surface may occur. Perhaps because of this alienation, silver streak-like irregularities occur on the surface, and only molded products with so-called dull and rough surfaces can be obtained. In order to quantify the appearance and gloss of the glass fiber-reinforced AS resin injection molded product of the present invention, the glossiness G of the molded product was determined by ASTM D523.
The result of measuring s(600)% was 98%.
一方金型温度60℃の成形品は光沢度45%であり本発
明になる射出成形品外観の平滑性、光沢の良さを示して
いる。また本発明になる成形品は射出成形時の流動低抗
が少なく配向歪が発生しずらいためかJISK687l
に規定された加熱変形温度を測定したところ通常の成形
品に比較し加熱変形温度が3〜5℃向上し、いわゆる実
用耐熱温度が向上すること、成形品の落下強さ等比較し
た結果実用タフネスも向上することを確認した。本発明
でいう充填材とはガラス繊維、ガラス球炭酸カルシウム
、雲母、アスベスト、等の無機物や鉄、銅、亜鉛、アル
ミニウムおよびそれらの酸化物等の金属の粉末及び中空
体をいいその主粒度が5メッシュ以下の小粒径のものを
云う。On the other hand, the molded product produced at a mold temperature of 60° C. had a gloss level of 45%, indicating the smoothness and gloss of the injection molded product appearance of the present invention. In addition, the molded product of the present invention has low flow resistance during injection molding, and orientation distortion is less likely to occur.
Measurement of the heating deformation temperature specified in It was confirmed that this also improved. The filler used in the present invention refers to powders and hollow bodies of inorganic materials such as glass fiber, glass bulb calcium carbonate, mica, and asbestos, and metals such as iron, copper, zinc, aluminum, and their oxides. This refers to particles with a small particle size of 5 mesh or less.
本発明でいう熱可塑性樹脂とはポリスチレン、ゴム補強
ポリスチレン(以下総称しPSと略す)アクリロニトリ
ル−スチレン重合体(AS樹脂)、アクリロニトリルー
ブタジエンースチレン重合体、アクリロニトリルーブタ
ジエンースチレンーα−メチルスチレン、アクリロニト
リルーメチルメタクリレートーブタジエンースチレン(
以下総称しABS樹脂と略す)、ポリエチレン、ポリプ
ロピレン、ポリカーボネート、ポリフェニレンエーテル
、ポリオキシメチレン、ナイロン等のいわゆる熱可塑性
樹脂を全て包含する。In the present invention, thermoplastic resins include polystyrene, rubber-reinforced polystyrene (hereinafter collectively referred to as PS), acrylonitrile-styrene polymer (AS resin), acrylonitrile-butadiene-styrene polymer, acrylonitrile-butadiene-styrene-α-methylstyrene. , acrylonitrile-methyl methacrylate-butadiene-styrene (
It includes all so-called thermoplastic resins such as ABS resin (hereinafter collectively referred to as ABS resin), polyethylene, polypropylene, polycarbonate, polyphenylene ether, polyoxymethylene, and nylon.
実施例1
直径13pのガラス繊維、2鍾量%添加AS樹脂を通常
のインライン型射出成形機で成形した。Example 1 A glass fiber having a diameter of 13p and an AS resin containing 2% by weight were molded using a normal in-line injection molding machine.
金型は通常のS−45C鋼材を利用し、第1図に示す概
念図に準する直径10cm1深さ2CIn1平均肉厚3
.5wmの皿状の成形品を成形できる金型になつており
、ゲートはセンターダイレクトゲートである。インダク
ターは3顛径の銅管を5顛間隔の渦巻状に皿形状にそわ
せ型づくり、それを3Crf1の厚さになる様にエポキ
シ樹脂で注型し平板状に固定固化作成する。The mold is made of ordinary S-45C steel, and has a diameter of 10 cm, a depth of 2 CIn, and an average wall thickness of 3 according to the conceptual diagram shown in Figure 1.
.. The mold is capable of molding a 5wm dish-shaped product, and the gate is a center direct gate. The inductor is made by molding a 3-frame diameter copper tube into a dish shape in a spiral pattern with 5-frame intervals, then casting it with epoxy resin to a thickness of 3Crf1 and solidifying it into a flat plate.
射出成形条件は該ガラス繊維添力0AS樹脂の温度が2
40℃になる様にシリンダー温度を設定した。The injection molding conditions are that the temperature of the AS resin with 0 glass fiber addition is 2.
The cylinder temperature was set to 40°C.
該ガラス繊維強化AS樹脂を金型に射出する前に上述の
インダクターを金型の間にはさみこみ400KC..6
KWの高周波発振器により15秒間発振し、第2図に準
じて金型を加熱した。しかるのち金型を開きインダクタ
ーを金型間より抜き出し再・度金型を閉じた。その間金
型冷却水は金型内を流れない様にしておく、しかるのち
通常の射出成形と同様に金型内に該充填材入り樹脂を6
0k9/Cltの射出圧で1囲2間射出し、しかるのち
金型に冷却水を通し加秒間冷却後成形品を取り出した。
全サイ・クル時間は6@であつた。表面きずのないもの
である。この射出成形品はガラス繊維を含まないAS樹
脂射出成形品と同様の外観を有しシルバーストリーク、
ガラス繊維の表面への突出しない非常に外観の良いもの
でやわらかで高度の光沢をもノつ成形品であつた。実施
例2
15μのガラス繊維2唾量%添加ABS樹脂加熱変形温
度を通常の射出成形機で樹脂温度240℃で成形した。Before injecting the glass fiber-reinforced AS resin into a mold, the above-mentioned inductor was inserted between the molds and a 400KC. .. 6
The mold was heated by oscillating for 15 seconds using a KW high-frequency oscillator as shown in FIG. Thereafter, the mold was opened, the inductor was extracted from between the molds, and the mold was closed again. During this time, the mold cooling water is prevented from flowing inside the mold, and then the filler-containing resin is poured into the mold as in normal injection molding.
The molded product was injected at an injection pressure of 0k9/Clt for 2 hours, and then cooled by passing cooling water through the mold for a few seconds, and then the molded product was taken out.
The total cycle time was 6@. There are no surface scratches. This injection molded product has the same appearance as an AS resin injection molded product that does not contain glass fiber, and has silver streaks,
The molded product had a very good appearance with no glass fibers protruding from the surface, and was soft and had a high gloss. Example 2 An ABS resin containing 15μ of glass fiber in an amount of 2% was molded using a conventional injection molding machine at a resin temperature of 240°C.
金型はJISK687lに規定された形状のダンベル及
び短冊を得ることが出来る金型で、材質はS−55Cで
作成されている。インダクターは377I77!径の銅
管を5T1r!Ft間隔で渦巻状に配置し、これをエポ
キシ樹脂で2cm厚の平板に注型し固定固化したものを
使用した。成形方法は実施例1と同様であるが400K
C,.6KW1高周波発振時間10秒、射出1醗、冷却
托秒、成形サイクル5[相]とし前記のごとく表面温度
の高められた金型(第2図参照)に射出圧50k9/C
7lfで射出成形した。得られたガラス繊維強化ABS
成形品の表面は1〜50μのABS樹脂の滑らかな表皮
層で覆われ、ガラス繊維の成形品表面への突出、露出が
ないことを確認した。成形品の光沢、物性は表1に示す
通りである。表1の結果より明らかなようにこの射出成
形品の光沢度は著しく高くまた物性にも優れたものであ
る。比較例1
実施例2の場合と同一成形機、金型を利用、同一成形材
料を利用し樹脂温度240℃、金型温度60℃、射出1
0秒、冷却1融、全成形サイクル菊秒、射出圧50k9
/dで成形し該成形品の物性を測定した結果は第1表比
較例1に示す。The mold is a mold capable of producing dumbbells and strips having shapes specified in JIS K687l, and is made of S-55C. The inductor is 377I77! 5T1r diameter copper pipe! They were arranged in a spiral shape at intervals of Ft, and this was cast into a 2 cm thick flat plate with epoxy resin and fixed and solidified. The molding method was the same as in Example 1, but at 400K.
C,. 6KW1 high frequency oscillation time 10 seconds, injection 1, cooling 1 second, molding cycle 5 [phase], injection pressure 50k9/C into the mold with elevated surface temperature as described above (see Figure 2).
Injection molded at 7lf. Obtained glass fiber reinforced ABS
It was confirmed that the surface of the molded product was covered with a smooth skin layer of ABS resin with a thickness of 1 to 50 μm, and that no glass fibers were protruding or exposed on the surface of the molded product. The gloss and physical properties of the molded product are as shown in Table 1. As is clear from the results in Table 1, the gloss of this injection molded product is extremely high and its physical properties are also excellent. Comparative Example 1 Using the same molding machine and mold as in Example 2, using the same molding material, resin temperature 240°C, mold temperature 60°C, injection 1
0 seconds, cooling 1 melt, whole molding cycle 10 seconds, injection pressure 50k9
The results of measuring the physical properties of the molded product are shown in Comparative Example 1 in Table 1.
実施例3
200メッシュの鉄粉50重量%添力11PS樹脂を、
通常のインライン型射出成形機で樹脂温度220℃で成
形した。Example 3 11PS resin with 50% by weight of 200 mesh iron powder added,
Molding was carried out using a normal in-line injection molding machine at a resin temperature of 220°C.
金型は5cm×80×0.5d深さの箱型成形品であり
これを同時に一対成形できる様になつており、互に組合
せ嵌合する事によりヒンジを有するケースができる様に
なつた金型である。またゲートは制限サイドゲートであ
る。インダクターは5T!Rm径の銅管を5Tm間隔の
渦巻形に平面状に配置し、これを2cff1厚さの平板
になる様にエポキシ樹脂で注型し、銅管を固定、固化し
たものを使用した。The mold is a box-shaped molded product measuring 5 cm x 80 x 0.5 d deep, and a pair of these can be molded at the same time, and by fitting them together, a case with a hinge can be created. It is a type. The gate is also a restricted side gate. The inductor is 5T! Copper tubes with a diameter of Rm were arranged in a spiral shape at 5Tm intervals in a planar manner, and this was cast with epoxy resin to form a flat plate with a thickness of 2cff1, and the copper tubes were fixed and solidified.
このインダクターを金型間にはさみこみ
400KC,.6KWの高周波を1聞2間発振し然るの
ちインダクターを金型間より抜き出し、実施例1の場合
と同様の要領で射出成形を行なつた。This inductor was inserted between the molds and the 400KC. After oscillating a high frequency of 6 kW for 1 to 2 minutes, the inductor was extracted from between the molds, and injection molding was performed in the same manner as in Example 1.
得られた成形品の表面は鉄粉が見られず、シル・パース
トリーク、フローマーク、ジエツテイング等もなく、成
形品の表面光沢Gs(60テ)%は100%であり光沢
勾配もない換言すると均一、高光沢の成形品を得た。No iron powder was observed on the surface of the obtained molded product, and there were no sill particles, flow marks, jetting, etc., and the surface gloss Gs (60%) of the molded product was 100%, in other words, there was no gloss gradient. A uniform, high-gloss molded product was obtained.
更に成形品の比重は1.8あり従来のPS成形品にはな
い重量感のある、どつしりした、やわらかな高光沢の製
品を成形することが出来た。以上のように、本発明によ
る充填材入り、熱可塑性樹脂射出成形品は充填材を含む
層を覆う1〜100μの厚さの滑らかな表面をもつ熱可
塑性樹脂の表皮層を形成した構造を有するので、成形品
表面はフローマーク、シルバーストリークのない滑らか
でやわらかな高度の光沢のある外観を有する成形品であ
る。Furthermore, the specific gravity of the molded product was 1.8, making it possible to mold a heavy, heavy, soft, and high-gloss product that was not found in conventional PS molded products. As described above, the thermoplastic resin injection molded product containing a filler according to the present invention has a structure in which a skin layer of thermoplastic resin with a smooth surface and a thickness of 1 to 100 μm is formed to cover the layer containing the filler. Therefore, the molded product surface is smooth and soft without flow marks or silver streaks, and the molded product has a highly glossy appearance.
打ち放しの射出成形によりこのように優れた外観をもつ
充填材入り熱可塑性樹脂射出成形品を製造できることは
射出成形の生産性を著しく高めることになる。本発明の
成形品は表面が高度に滑らかでかつ又剛性と寸法安定性
にも優れた充填材入り熱可塑性樹脂射出成形品であるの
で嵌合部分や摺動部を有する構造部品に有利に使用でき
る。例えばガラス繊維強化AS樹脂製テープレコーダー
シャーシーにおいては該ブッシュボタン部の摺動抵抗が
少ない。また口紅ケースにおけるキャップをガラス繊維
強化ABS樹脂で作成した場合にその剛性、やわらかな
光沢を有する外観、スナップヒット性(キャップ締り時
の嵌合性)等従来にないバランスのすぐれた成形品を得
る等、本発明の有用性は、はかりしれないものが有る。The ability to produce filled thermoplastic resin injection molded articles with such excellent appearance by stamped injection molding significantly increases the productivity of injection molding. The molded product of the present invention is a filled thermoplastic resin injection molded product with a highly smooth surface and excellent rigidity and dimensional stability, so it can be advantageously used for structural parts that have fitting parts or sliding parts. can. For example, in a tape recorder chassis made of glass fiber reinforced AS resin, the sliding resistance of the bush button portion is small. Furthermore, when the cap of a lipstick case is made of glass fiber-reinforced ABS resin, a molded product with an unprecedented balance of rigidity, soft glossy appearance, and snap-fitting properties (fitting properties when the cap is tightened) can be obtained. The usefulness of the present invention is immeasurable.
第1図は本発明になる成形品を製造するための一概念図
である。
第2図は、第1図に示す装置での金型の温度分布の1例
を示す。第3図、第4図、本発明の一様態でガラス繊維
強化AS樹脂成形品の厚さ方向の断面写真である。第5
図、第6図は比較写真であり通常の成形法によるガラス
繊維強イ5AS樹脂成形品の厚さ方向の断面写真である
。1は金型における固定側金型、2は移動側金型である
。FIG. 1 is a conceptual diagram for manufacturing a molded article according to the present invention. FIG. 2 shows an example of the temperature distribution of the mold in the apparatus shown in FIG. FIG. 3 and FIG. 4 are cross-sectional photographs in the thickness direction of a glass fiber-reinforced AS resin molded product according to one embodiment of the present invention. Fifth
Figure 6 is a comparison photograph, which is a cross-sectional photograph in the thickness direction of a glass fiber-reinforced 5AS resin molded product made by a conventional molding method. Reference numeral 1 denotes a stationary mold, and 2 a movable mold.
Claims (1)
形品の表面には充填剤を含まない厚さ1〜100μの表
面の滑らかな熱可塑性樹脂の表皮層が実質的に接合界面
を有さず射出成形時に一体的に形成されてなり、該成形
品表面がASTMD523に規定される入射角60゜に
おける光沢度Gs(60゜)%が80以上の光沢を有し
、かつフローマーク、シルバーストリークのない充填剤
入り熱可塑性樹脂射出成形品。1 A filler-containing thermoplastic resin injection molded product, in which the surface of the molded product has a smooth thermoplastic resin skin layer with a thickness of 1 to 100 μm that does not contain a filler and substantially has a bonding interface. It is formed integrally during injection molding, and the surface of the molded product has a gloss level Gs (60°)% of 80 or higher at an incident angle of 60° as defined by ASTM D523, and has a flow mark, silver Streak-free filled thermoplastic injection molded product.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54015423A JPS6056604B2 (en) | 1979-02-15 | 1979-02-15 | Filled thermoplastic resin injection molded product |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54015423A JPS6056604B2 (en) | 1979-02-15 | 1979-02-15 | Filled thermoplastic resin injection molded product |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55109637A JPS55109637A (en) | 1980-08-23 |
JPS6056604B2 true JPS6056604B2 (en) | 1985-12-11 |
Family
ID=11888349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54015423A Expired JPS6056604B2 (en) | 1979-02-15 | 1979-02-15 | Filled thermoplastic resin injection molded product |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6056604B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02137306U (en) * | 1989-04-19 | 1990-11-15 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6144616A (en) * | 1984-08-10 | 1986-03-04 | Japan Steel Works Ltd:The | Molding process of thin wall molded product |
-
1979
- 1979-02-15 JP JP54015423A patent/JPS6056604B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02137306U (en) * | 1989-04-19 | 1990-11-15 |
Also Published As
Publication number | Publication date |
---|---|
JPS55109637A (en) | 1980-08-23 |
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