JPH05329880A - Production of composite case - Google Patents

Production of composite case

Info

Publication number
JPH05329880A
JPH05329880A JP14188192A JP14188192A JPH05329880A JP H05329880 A JPH05329880 A JP H05329880A JP 14188192 A JP14188192 A JP 14188192A JP 14188192 A JP14188192 A JP 14188192A JP H05329880 A JPH05329880 A JP H05329880A
Authority
JP
Japan
Prior art keywords
cavity
mold
resin
tapered
elastic
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.)
Withdrawn
Application number
JP14188192A
Other languages
Japanese (ja)
Inventor
Masanobu Ishizuka
Koichi Kimura
Takashi Muratani
Kota Nishii
Makoto Usui
浩一 木村
孝 村谷
賢伸 石塚
誠 臼居
耕太 西井
Original Assignee
Fujitsu Ltd
富士通株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd, 富士通株式会社 filed Critical Fujitsu Ltd
Priority to JP14188192A priority Critical patent/JPH05329880A/en
Publication of JPH05329880A publication Critical patent/JPH05329880A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14311Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles

Abstract

PURPOSE:To obtain a thin-wall case having a required impact strength by a method wherein a mold is composed of a core and a cavity, an elastic sheet provided with a plurality of tapered holes or lugs is positioned on the inner surface of the cavity, and an injection molding is carried out. CONSTITUTION:A mold is composed of a core and a cavity. An elastic body 2 provided with tapered holes or an elastic body 5 provided with tapered lugs is inserted in the inner surface of the cavity to be positioned thereon. After that, a resin 3 is injected from a gate and cured. In this manner, a composite case having a good adhesion can be obtained. As the elastic bodies 2, 5, a silicone rubber or fluoro rubber sheet 0.8mm or more thick is preferably used.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は電子機器用複合筐体の製造方法に関する。 The present invention relates to a method for producing a composite housing for electronic equipment. 近年、電子機器は小形軽量化が進められているが、筐体についても同様であって薄型化が必要である。 Recently, electronic equipment size and weight reduction has been promoted, it is necessary to thin a same applies to the housing.

【0002】こゝで、電子機器用筐体の必要条件は強度が大で、また耐衝撃性に優れていることである。 [0002] This ゝ a necessary condition of the electronic equipment housing strength large, also is to have excellent impact resistance.

【0003】 [0003]

【従来の技術】従来、耐衝撃性の優れた樹脂としてAB Conventionally, AB as excellent in impact resistance resin
S(アクリロニトリル・ブタジエン・スチレン)樹脂やポリカーボネート樹脂が使用されてきた。 S (acrylonitrile butadiene styrene) resin or a polycarbonate resin have been used.

【0004】これらの樹脂は価格も安いことから、電子機器用筐体材料として一般に使用されている。 [0004] These resins since price cheaper, are commonly used as a housing material for electronic devices. 然し、樹脂の流動性が充分でないことから、筐体が薄型化するに従って成形が困難になってきた。 However, since the fluidity of the resin is not sufficient, housing molding has become difficult according to thin.

【0005】そこで、これらの樹脂に代わって比較的流動性のよいポリアミドやPBT(ポリブチレンテレフタレート)などが着目されている。 [0005] Therefore, like in place of these resins relatively flowable good polyamide and PBT (polybutylene terephthalate) is focused. 然し、これらの樹脂は必要とする強度は有するものゝ、耐衝撃性は不充分であって必要条件を満たさない。 However, these resins intensity required to have ゝ, impact resistance does not satisfy the necessary conditions was insufficient.

【0006】この対策として、ゴムをフィラとして樹脂中に混合することも検討されたが、ゴムの混合量には限界があるため、必要とする耐衝撃性を得ることができないし、また、薄型化により成形自体が困難である。 [0006] As a countermeasure, it was also considered to be mixed into the resin rubber as filler, since the mixing amount of the rubber is limited, can not get the impact resistance in need, also, a thin it is difficult to mold itself by reduction.

【0007】 [0007]

【発明が解決しようとする課題】電子機器の小形軽量化により筐体についても薄型化が必要であり、樹脂の強度を低下させることなく、必要とする衝撃強度をもつ薄肉筐体の製造方法を実用化することが課題である。 The size and weight of electronic equipment [0006] requires a reduction in thickness for housing, without reducing the strength of the resin, a method for manufacturing a thin-walled housing with impact strength that requires it is an object of practical use.

【0008】 [0008]

【課題を解決するための手段】上記の課題はコア型とキャビティ型よりなる射出成形金型のキャビティ型の内面に、複数のテーパー状をした孔あるいは突起を内側に備えた弾性シートを位置決めした後、この金型を閉じ、樹脂の射出成形を行なうことを特徴として複合筐体の製造方法を構成することにより解決することができる。 Above problems SUMMARY OF THE INVENTION The core mold and the inner surface of the cavity of the injection mold composed of a cavity mold, positioning the elastic sheet with a hole or projection which a plurality of tapered inwardly after, the mold closed, as characterized by performing injection molding of the resin can be solved by configuring the method for manufacturing a composite casing.

【0009】 [0009]

【作用】強度と耐衝撃性は相反する特性であって、双方が優れた樹脂は存在しない。 [Action] strength and impact resistance is a contradictory properties, not both excellent resin present. そこで、発明者等は双方の特性を満足する方法として複合体を考えた。 Therefore, inventors have considered a complex as a way to satisfy both properties.

【0010】こゝで、強度をもたせる樹脂としては流動性の良いものを選び、また、耐衝撃性を付与するものとしてゴム弾性体を選び、これを張り合わせて複合体を形成することにより必要条件を満足させた。 [0010] This ゝ a, as a resin to have a strength to select good fluidity, also select the rubber elastic body as to impart impact resistance, requirement by forming a complex by bonding this I was satisfied.

【0011】なお、ゴム弾性体と樹脂とでは材料が全く異なり、また熱膨張係数も異なるので、接着性の優れた複合筐体を実現するには機械的な噛み合わせ機構が必要であり、発明者等は接合するゴム弾性体にテーパー状をした孔または突起を備え、この状態で樹脂を射出成形して一体化させた。 [0011] Incidentally, at all material it is different in the rubber elastic body and a resin, also since different thermal expansion coefficients, in order to achieve the adhesion of excellent composite enclosure requires mechanical interlocking mechanism, invention shielding, etc. is provided with a hole or protrusion to the tapered rubber elastic body for joining to the resin are integrated by injection molding in this state.

【0012】図1はこのようにして形成した複合筐体の構成を示す断面図であって、同図(A)はテーパー状の孔1を内面にもつ弾性体2に樹脂3の射出成形を行ない、テーパー状の孔1の中に樹脂3を充填することにより密着性を向上したものであり、また同図(B)ははテーパー状の突起4をもつ弾性体5に樹脂3の射出成形を行ない、テーパー状の突起4を硬化した樹脂3で締め付けることにより密着性を向上したものである。 [0012] Figure 1 is a cross-sectional view showing the structure of the thus formed a composite body, Fig. (A) The elastic body 2 having a tapered hole 1 on the inner surface of the injection-molding resin 3 deeds, is intended to improve adhesion by filling the resin 3 into the tapered hole 1 and injection molding of the resin 3 on the elastic member 5 having a projection 4 of FIG. (B) mother tapered the performed, in which improved adhesion by tightening a resin 3 formed by curing a tapered protrusion 4.

【0013】また、図2は本発明に係る複合筐体の成形法を示す断面図であって、金型6はコア型7とキャビティ型8とから構成されているが、このキャビティ型8の内面にテーパー状の孔をもつ弾性体2あるいはテーパー状の突起をもつ弾性体5を挿入して位置決めする。 [0013] FIG. 2 is a cross-sectional view illustrating a molding process of the composite housing of the present invention, although the die 6 is constituted by a core mold 7 and the cavity mold 8 Prefecture, the cavity mold 8 insert the elastic member 5 having the elastic body 2 or tapered projection having a tapered hole on the inner surface for positioning. (以上同図A) 次に、ゲート9より樹脂10を射出成形して硬化させことにより接着性のよい複合筐体を得ることができる。 (Or FIG. A) can then be obtained an adhesive having good composite body by the resin 10 from the gate 9 is cured by injection molding. ( 以上同図B) 本発明は強度と耐衝撃性を併せもつ方法として機械的な噛み合わせ機構をもつ弾性体に樹脂を射出成形して一体化させるもので、密着性のよい複合筐体を得ることができる。 (Or FIG. B) The present invention is intended to be integrated by injection-molding a resin elastic material having a mechanical interlocking mechanism as a way of having both strength and impact resistance, a good adhesion complexes housing it is possible to obtain.

【0014】なお、試作を繰り返して検討した結果、テーパー状の孔あるいは突起の形状は円形,三角形,四角形など単純な形で鋭角の角が無いようにすることが必要で、これはモールド成形に当たって応力の局部的な集中を避けるためである。 [0014] As a result of study by repeated trial, tapered hole or shape of the projection is circular, triangular, it is necessary to ensure that no sharp corners in a simplified form such as a rectangle, which when molded in order to avoid local concentration of stress.

【0015】 [0015]

【実施例】樹脂としてポリアミドを使用し、また、弾性体としてシリコーンゴム,弗素ゴム,天然ゴムの三種類を使用し、厚さが0.8mm,1.0mm,1.2mm の弾性シートを作った。 Polyamide was used as EXAMPLES resin, also used a silicone rubber as an elastic body, fluorine rubber, three kinds of natural rubber, the thickness is made 0.8 mm, 1.0 mm, a 1.2mm elastic sheet.

【0016】そして、図2に示すように弾性シートをキャビティ型8の中に位置決めし、ポリアミドの射出成形を行なった。 [0016] Then, the elastic sheet as shown in FIG. 2 is positioned in the cavity 8, it was carried out injection molding of polyamide. 射出成形の条件は成形温度280 ℃, 成形圧力200Kg/cm 2である。 Conditions of the injection molding molding temperature 280 ° C., a molding pressure 200 Kg / cm 2.

【0017】そして、成形品よりJIS-K7110 の2号Aに準拠する試験片を作りアイゾット衝撃試験を行なって耐衝撃性を調べた。 [0017] Then, examined the impact resistance by performing Izod impact test made a test piece conforming to No. 2 A of JIS-K7110 from the molded article. 表1はこの結果を示すもので、シリコーンゴムと弗素ゴムの場合、シート厚が0.8mm 以下では成形圧によりシートが破れる場合があり、効果が低いが Table 1 shows the results, in the case of silicone rubber and fluorine rubber, may sheet thickness sheet is broken by the molding pressure is 0.8mm or less, but less effective
0.8mm 以上とすると耐衝撃性が向上した。 Impact resistance is improved when a 0.8mm or more.

【0018】また、寸法が25×20mm, 厚さ2.5mm の成形品に1.5 Kgの鉄板を重りとして落下試験を行なった。 Further, the size makes a drop test 25 × 20 mm, a 1.5 Kg of iron plate molded article having a thickness of 2.5mm as a weight. この場合、落下面には厚さが1cmの鉄板を敷き、落下する樹脂部に長さ1mm以上の亀裂が生ずる高さを測定したが、結果はアイゾット衝撃試験の結果と一致した。 In this case, the thickness of the falling surface laid 1cm of iron has been measured length 1mm or more cracks occur height resin portion falls, the results were consistent with the results of the Izod impact test.

【0019】 [0019]

【表1】 [Table 1]

【0020】 [0020]

【発明の効果】本発明の実施によ必要とする強度と耐衝撃性を共に備えた電子機器用薄型筐体を実用化することができる。 It may be practiced thin housing for electronic equipment having both strength and impact resistance in need by the practice of the present invention, according to the present invention.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】複合筐体の構成を示す断面図である。 1 is a cross-sectional view showing the structure of a composite casing.

【図2】複合筐体の形成法を示す断面図である。 2 is a sectional view showing a method of forming a composite housing.

【符号の説明】 1 テーパー状の孔 2,5 弾性体 3,10 樹脂 4 テーパー状の突起 6 金型 7 コア型 8 キャビティ型 [EXPLANATION OF SYMBOLS] 1 tapered hole 2,5 elastic member 3,10 Resin 4 tapered projections 6 mold 7 Core mold 8 cavity mold

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl. 5識別記号 庁内整理番号 FI 技術表示箇所 H01L 23/29 23/31 // B29K 27:12 83:00 B29L 31:34 4F (72)発明者 村谷 孝 神奈川県川崎市中原区上小田中1015番地 富士通株式会社内 (72)発明者 木村 浩一 神奈川県川崎市中原区上小田中1015番地 富士通株式会社内 ────────────────────────────────────────────────── ─── front page continued (51) Int.Cl. 5 identification symbol Agency Docket No. FI art display portion H01L 23/29 23/31 // B29K 27:12 83:00 B29L 31:34 4F (72) invention who Muratani Takashi Kawasaki City, Kanagawa Prefecture Nakahara-ku, Kamikodanaka 1015 address Fujitsu within Co., Ltd. (72) inventor Koichi Kimura, Kanagawa Prefecture, Nakahara-ku, Kawasaki, Kamikodanaka 1015 address Fujitsu within Co., Ltd.

Claims (2)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 コア型とキャビティ型よりなる射出成形金型のキャビティ型の内面に、複数のテーパー状をした孔あるいは突起を内側に備えた弾性シートを位置決めした後、該金型を閉じ、樹脂の射出成形を行なうことを特徴とする複合筐体の製造方法。 To 1. A core mold and the inner surface of the cavity of the injection mold composed of a cavity mold, after positioning the elastic sheet with a hole or projection which a plurality of tapered inward, closing the mold, method of manufacturing a composite casing and performing injection molding of resin.
  2. 【請求項2】 前記弾性シートが厚さ0.8mm 以上のシリコーンゴムまたは弗素ゴムからなることを特徴とする請求項1記載の複合筐体の製造方法。 2. A method for producing a composite body according to claim 1, characterized in that it consists of the elastic sheet thickness 0.8mm or more silicone rubber or fluorine rubber.
JP14188192A 1992-06-03 1992-06-03 Production of composite case Withdrawn JPH05329880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14188192A JPH05329880A (en) 1992-06-03 1992-06-03 Production of composite case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14188192A JPH05329880A (en) 1992-06-03 1992-06-03 Production of composite case

Publications (1)

Publication Number Publication Date
JPH05329880A true JPH05329880A (en) 1993-12-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP14188192A Withdrawn JPH05329880A (en) 1992-06-03 1992-06-03 Production of composite case

Country Status (1)

Country Link
JP (1) JPH05329880A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2199064A1 (en) * 2007-09-11 2010-06-23 Toray Industries, Inc. Composite shaped article and process for manufacturing the same
JP2011506135A (en) * 2007-12-14 2011-03-03 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングRobert Bosch Gmbh Multi-component injection-molded parts with seals by material bonding
CN106523211A (en) * 2015-09-15 2017-03-22 现代自动车株式会社 Air duct for vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2199064A1 (en) * 2007-09-11 2010-06-23 Toray Industries, Inc. Composite shaped article and process for manufacturing the same
EP2199064A4 (en) * 2007-09-11 2011-03-23 Toray Industries Composite shaped article and process for manufacturing the same
US8173238B2 (en) 2007-09-11 2012-05-08 Toray Industries, Inc. Composite shaped article and process for manufacturing the same
JP2011506135A (en) * 2007-12-14 2011-03-03 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングRobert Bosch Gmbh Multi-component injection-molded parts with seals by material bonding
US8435618B2 (en) 2007-12-14 2013-05-07 Robert Bosch Gmbh Multi-component injection-molded part with material-locking sealing
CN106523211A (en) * 2015-09-15 2017-03-22 现代自动车株式会社 Air duct for vehicle

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