JPS61123082A - Chassis of floppy disk device - Google Patents
Chassis of floppy disk deviceInfo
- Publication number
- JPS61123082A JPS61123082A JP24325284A JP24325284A JPS61123082A JP S61123082 A JPS61123082 A JP S61123082A JP 24325284 A JP24325284 A JP 24325284A JP 24325284 A JP24325284 A JP 24325284A JP S61123082 A JPS61123082 A JP S61123082A
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- chassis
- thermal expansion
- floppy disk
- mechanical strength
- 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 claims abstract description 54
- 239000000057 synthetic resin Substances 0.000 claims abstract description 54
- 239000010445 mica Substances 0.000 claims abstract description 16
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 16
- 239000003365 glass fiber Substances 0.000 claims abstract description 9
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 31
- 238000000465 moulding Methods 0.000 abstract description 43
- 230000003014 reinforcing effect Effects 0.000 abstract description 7
- 239000012779 reinforcing material Substances 0.000 abstract description 5
- 239000004417 polycarbonate Substances 0.000 abstract description 4
- 229920000515 polycarbonate Polymers 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 2
- 239000003063 flame retardant Substances 0.000 abstract description 2
- 239000011521 glass Substances 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 9
- 229910052628 phlogopite Inorganic materials 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 7
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 239000000835 fiber Substances 0.000 description 7
- 229910000077 silane Inorganic materials 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000004727 Noryl Substances 0.000 description 3
- 229920001207 Noryl Polymers 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052627 muscovite Inorganic materials 0.000 description 2
- 239000002990 reinforced plastic Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 101100387923 Caenorhabditis elegans dos-1 gene Proteins 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Casings For Electric Apparatus (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はフロッピーディスク装置、特に各種構成部品を
装着するベースとなるシャーシに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a floppy disk device, and particularly to a chassis serving as a base on which various component parts are mounted.
（従来の技術）
最近パーソナルコンピュータ或いはワードプロセッサ等
のＯＡ機器類の外部記憶装置として、データの記録及び
／又は再生を行うための磁気記録媒体としてフレキシブ
ル磁気ディスクを用いたフロッピーディスク装置が広く
普及して来た。(Prior Art) Floppy disk drives using flexible magnetic disks as magnetic recording media for recording and/or reproducing data have recently become widely used as external storage devices for personal computers, word processors, and other office automation equipment. It's here.
従来のフロッピーディスク装置に於ては、各種構成部品
を装着するベースとなるシャーシはアルミニウム合金に
よって形成されていたが、最近は、装置の軽量化或いは
材料費及び加工費の削減を目的に合成樹脂にＪ：る成形
が検討されるようになった。In conventional floppy disk devices, the chassis, which is the base on which various components are attached, was made of aluminum alloy, but recently synthetic resin has been used to make the device lighter and to reduce material and processing costs. J: Molding started to be considered.
従来は、シャーシを一般の合成樹脂によって成形した場
合は機械的強度や寸法安定性が劣り問題があるのでガラ
スｌｌｉ紺を配合した合成樹脂、いわゆる強化プラスチ
ックを利用した。Conventionally, when the chassis was molded from general synthetic resin, mechanical strength and dimensional stability were poor, so a synthetic resin mixed with glass lli navy blue, so-called reinforced plastic, was used.
（発明が解決しようとする問題点〉
しかし、ガラス繊維を配合した強化プラスブックによっ
てシ１７−シを成形した場合、特性がかなり改良されて
はいるものの熱膨張率や成形収縮率に方向性が生じ、フ
ロッピーディスク装置に於て要求される高い寸法精度を
満すことが出来なかった。(Problems to be Solved by the Invention) However, when a sheet is molded using a reinforced plastic book containing glass fibers, although the properties are considerably improved, the thermal expansion coefficient and molding shrinkage rate are not directional. As a result, it was not possible to meet the high dimensional accuracy required for floppy disk drives.
本発明は前記した如き従来技術の欠点に鑑み、機械的強
度、熱膨張、成形収縮等の特１９に方向１４４が生ずる
ことなく高い機械的強度と寸法精度とを有する合成樹脂
製のシャーシを提供することを目的に創案されたもので
ある。In view of the drawbacks of the prior art as described above, the present invention provides a chassis made of synthetic resin that has high mechanical strength and dimensional accuracy without causing any deviation in direction 144 in terms of mechanical strength, thermal expansion, molding shrinkage, etc. It was created with the purpose of doing so.
（問題点を解決するだめの手段）
ずなわら本発明は、非結晶性熱可塑性樹脂にガラス４１
ｉ帷及び雲母を配合した合成樹脂組成物にて成形したこ
とを特徴とするフロッピーディスク装置のシャーシであ
る。(Another Means to Solve the Problems) The present invention has the advantage of adding glass 41 to an amorphous thermoplastic resin.
This is a chassis for a floppy disk device, characterized in that it is molded from a synthetic resin composition containing i-paper and mica.
（作用）
本発明は前記した如く構成されるものであり、その作用
は、ベースとなる合成樹脂に非結晶性熱可塑性樹脂を利
用することにより、合成樹脂自体の結晶配向性による寸
法精度の不安定性を先ず除去し、次いで補強材としてガ
ラス１８ ＩＣに加えて機械的強度のすぐれた偏平な薄
片である雲母を配合して補強効果の方向性を排除した合
成樹脂組成物により成形され、高い機械的強度と寸法精
度を有しフロッピーディスク装置どして良く）斉合する
シャーシが提供される。(Function) The present invention is constructed as described above, and its function is that by using an amorphous thermoplastic resin as the base synthetic resin, there is concern about dimensional accuracy due to the crystal orientation of the synthetic resin itself. It is molded from a synthetic resin composition in which the stiffness is first removed, and then mica, which is a flat flake with excellent mechanical strength, is added to glass 18 IC as a reinforcing material to eliminate the directionality of the reinforcing effect. A chassis is provided that has physical strength and dimensional accuracy and is compatible with a floppy disk device.
（実施例）
実施例１゜
中粘度タイプの一般射出成形用ポリカーボネー１〜樹脂
（帝人、パンライｌ−１−１２５０）に対してシランカ
ップリング処理した繊維長３〜（３ｍｍのガラスヂョッ
プドス１〜ランド２０重間％及び平均アスペクト２５、
粒径３０’Ｏメツシユアンダーの金雲１１１５重量％を
配合し、引張強さ１２１０ｋｇ／Ｃｎ１２、曲げ弾１１
率８３．０ＯＯｋ（１／ｃｍ２、流れ方向熱膨張係数２
、４ Ｘ １０ −５ｃｍ／ｃｍ／℃、流れ方向対流
れに対する直角方向の熱膨張係数の比（熱膨張係数比）
１．２９、流れ方向成形収縮率０．２５％、流れ方向対
流れに直角方向の成形収縮率の比（成形収縮率比）１．
２／Ｉ、熱変形温度１４７℃の合成樹脂組成物を１ｑた
。(Example) Example 1 Medium viscosity type polycarbonate for general injection molding 1 ~ Resin (Teijin, Panrai 1-1-1250) treated with silane coupling to fiber length 3 ~ (3 mm glass shop) Dos 1 to land 20% weight and average aspect 25,
Contains 1115% by weight of gold cloud with particle size 30'O mesh under, tensile strength 1210kg/Cn12, bending bullet 11
rate 83.0OOk (1/cm2, coefficient of thermal expansion in the flow direction 2
, 4 X 10 -5 cm/cm/°C, ratio of coefficient of thermal expansion in direction of flow to direction perpendicular to flow (coefficient of thermal expansion ratio)
1.29, molding shrinkage rate in the machine direction 0.25%, ratio of molding shrinkage rate in the machine direction to direction perpendicular to the machine direction (molding shrinkage rate ratio)1.
2/I, 1 q of a synthetic resin composition having a heat distortion temperature of 147°C was prepared.
前記合成樹脂組成物により成形されたシャーシは、機械
的強度及び寸法精度共にフロッピーディスク装置として
十分満足し得るものであった。The chassis molded from the synthetic resin composition had sufficient mechanical strength and dimensional accuracy as a floppy disk device.
実施例２゜
実施例１に於て金雲母の配合量を１０重量％とし、引張
強さ１１９０ Ｊ／ａｍ２、曲げ弾性率７８゜０００
ｋｇ／ ｃｍ２、流れ方向熱膨張係数２．６×１００−
５Ｃ／Ｃｍ／℃、熱膨張係数比１．３８、流れ方向成形
収縮率０．２６％、成形収縮率比１゜２７、熱変形温度
１４６℃の合成樹脂組成物を得た。Example 2゜In Example 1, the amount of phlogopite was changed to 10% by weight, the tensile strength was 1190 J/am2, and the flexural modulus was 78゜000.
kg/cm2, machine direction thermal expansion coefficient 2.6×100-
A synthetic resin composition was obtained having a thermal expansion coefficient ratio of 5 C/Cm/°C, a thermal expansion coefficient ratio of 1.38, a machine direction molding shrinkage ratio of 0.26%, a molding shrinkage ratio of 1°27, and a heat distortion temperature of 146°C.
前記合成樹脂組成物により成形されたシャーシは機械的
強度及び寸法精度共にフロッピーディスク装置として満
足し得るものであった。The chassis molded from the synthetic resin composition had satisfactory mechanical strength and dimensional accuracy as a floppy disk device.
実施例３゜
一般グレード変成ＰＰＯ樹脂（Ｅ Ｐ ｌ−、ノリル７
３１Ｊ）に対してシランカップリング処理した１ＪＪｌ
ｆｆｉ長３〜５ｍｍのガラスチョツプドストランド２５
重量％及び平均アスペクト比３０、粒径３２５メツシコ
アンダーの金雲母２０重Ｍ％を配合し、引張強さ１３４
０ ｋｇ／ｃｍ２、曲げ弾性率９８，０００ ｋｇ／ｃ
ｍ２．流れ方向熱膨張係数２．３Ｘ１０．−’ＣＩｎ／
Ｃｍ／℃、熱膨張係数比１．１７、流れ方向成形収縮率
０．１９％、成形収縮率比１．３２、熱変形温度１３８
℃の合成樹脂組成物を得た。Example 3 General grade modified PPO resin (EP l-, Noryl 7
1JJl treated with silane coupling to 31J)
Glass chopped strand 25 with ffi length of 3 to 5 mm
Blended with phlogopite of 20% by weight and average aspect ratio of 30, particle size of 325, and tensile strength of 134.
0 kg/cm2, flexural modulus 98,000 kg/c
m2. Flow direction thermal expansion coefficient 2.3X10. -'CIn/
Cm/℃, thermal expansion coefficient ratio 1.17, machine direction molding shrinkage ratio 0.19%, molding shrinkage ratio 1.32, heat distortion temperature 138
A synthetic resin composition was obtained.
前記合成樹脂組成物にて成形されたシャーシは、機械的
強度及び寸法精度共にフロッピーディスク装置として十
分満足し得るものであった。The chassis molded from the synthetic resin composition had sufficient mechanical strength and dimensional accuracy as a floppy disk device.
実施例４゜
５一
実施例３に於てガラスチョップトス１〜ランド配合量２
０重量％、金雲母の配合量１５重量％とじ、引張強さ１
１６０ ｋｇ／ｃｍ２、曲げ弾性率７９，０００ ｋ（
１／ ｃｍ２、流れ方向熱膨張係数２．５Ｘ１０°ゝｃ
ｍ／ｃｍ／℃、熱膨張係数比１．２５、流れ方向成形収
縮率０．２４％、成形収縮率比１．３３、熱変形温度１
３５℃の合成樹脂組成物を１ｑた。Example 4゜5 - In Example 3, glass chop toss 1 to land blending amount 2
0% by weight, phlogopite content 15% by weight, tensile strength 1
160 kg/cm2, flexural modulus 79,000 k (
1/cm2, thermal expansion coefficient in the flow direction 2.5X10°c
m/cm/℃, thermal expansion coefficient ratio 1.25, machine direction molding shrinkage ratio 0.24%, molding shrinkage ratio 1.33, heat distortion temperature 1
1 q of the synthetic resin composition at 35°C was prepared.
前記合成樹脂組成物にて成形されたシャーシは、フロッ
ピーディスク装置として十分満足し得る機械的強度及び
寸法精度を有するものであった。The chassis molded from the synthetic resin composition had sufficient mechanical strength and dimensional accuracy as a floppy disk device.
実施例５゜
自己消火性ＡＢ’Ｓ樹脂（日本合成ゴム、ＪＳＲＮＣＩ
００）に対してシランカップリング処理したＩＢＭ長
３〜（３ｍｍのガラスチョツプドストランド１５重量％
及び平均アスペクト比３０、粒径３２５メッシュアンダ
、−の金雲母１０重量％を配合し、引張強さ９６０ ｋ
ｇ／ａｍ２、曲げ弾性率５９．００重ｋｇ／ｃｍ２、流
れ方向熱膨張係数３．８×１０−５０ｍ／Ｃｍ／℃、熱
膨張係数の比１．０８、流れ方向成形収縮率０．３６％
、成形収縮率比１．２２、熱変形高度１１５℃の合成樹
脂組成物を１ｇだ。Example 5 Self-extinguishing AB'S resin (Japan Synthetic Rubber, JSRNCI
IBM length 3~(3mm glass chopped strand 15% by weight treated with silane coupling to 00)
and 10% by weight of phlogopite with an average aspect ratio of 30, a particle size of 325 mesh, and a tensile strength of 960 k.
g/am2, bending elastic modulus 59.00 kg/cm2, machine direction thermal expansion coefficient 3.8 x 10-50 m/Cm/°C, thermal expansion coefficient ratio 1.08, machine direction molding shrinkage rate 0.36%
, 1 g of a synthetic resin composition with a molding shrinkage ratio of 1.22 and a heat deformation height of 115°C.
前記合成樹脂組成物にて成形されたシャーシは、フロッ
ピーディスク装置として満足し得る機械的強度及び寸法
精度を有するものであった。The chassis molded from the synthetic resin composition had sufficient mechanical strength and dimensional accuracy as a floppy disk device.
実施例６゜
実施例５に於てガラスチョツプドストランドの配合ｆｆ
１２０重伍％、金雲母の配合量１５重量％とし、引張強
ざ１０６０に！］／ｃｍ２、曲げ弾性率６ ／ｌ 。Example 6゜Combination of glass chopped strands in Example 5 ff
120% by weight, 15% by weight of phlogopite, and the tensile strength is 1060! ]/cm2, flexural modulus 6/l.
０００ ｋｇ／ ａｍ２、流れ方向熱膨１１１Ｂｆｆｆ
ｉｉ１３ 、 １ ｘｌ ０ −’ ａｍ／ｃｍ／’Ｃ
１熱膨服係数比１．１９、流れ方向成形収縮率０．３０
、成形収縮率比１．３０、熱変形温度１２６℃の合成樹
脂組成物を得た。000 kg/am2, thermal expansion in the flow direction 111Bfff
ii13, 1 xl 0 -'am/cm/'C
1 Thermal expansion coefficient ratio 1.19, machine direction molding shrinkage rate 0.30
A synthetic resin composition having a molding shrinkage ratio of 1.30 and a heat distortion temperature of 126° C. was obtained.
前記合成樹脂組成物によって成形されたシャーシは、フ
ロッピーディスク装置として満足し１りる（浅域的強度
及び寸法精度を有するものであった。The chassis molded from the synthetic resin composition was satisfactory as a floppy disk device (having shallow area strength and dimensional accuracy).
実施例７゜
ボリアリレー１〜樹脂（ユニデカ、ＵポリマーＵ−１０
０）に対してシランカップリング処理した繊維長３〜（
３ｍｍガラスヂョップドストランド１５重量％及び平均
アスペク１〜比３０．粒径３２５メツシコアンダーの金
雲母１０重■％を配合し、引張強さ１０４０ ｋｇ／ｃ
ｍ’ 、曲げ弾性率５６，０００ ｋｏ／ ｃｍ２、流
れ方向熱膨張係数３．２Ｘ１０−’ｃｍ／ｃｍ／’Ｃ１
熱膨張係数比率１．２２、流れ方向成形収縮率０．３２
％、成形収縮率比１．２８、熱変形温度２１５℃の合成
樹脂組成物を得た。Example 7 Boria Relay 1 ~ Resin (Unideca, U Polymer U-10
Fiber length 3~(
3mm glass chopped strands 15% by weight and average aspect ratio 1 to 30. Contains 10% by weight of phlogopite with a particle size of 325 and mesh corer, and has a tensile strength of 1040 kg/c.
m', flexural modulus 56,000 ko/cm2, machine direction thermal expansion coefficient 3.2X10-'cm/cm/'C1
Thermal expansion coefficient ratio 1.22, machine direction molding shrinkage rate 0.32
%, a molding shrinkage ratio of 1.28, and a heat distortion temperature of 215°C.
前記合成樹脂組成物によって成形されたシ１＝ −シは
、フロッピーディスク装置どして満足しｉ！７る機械的
強度及び寸法精度を有するものであった。The disk molded from the synthetic resin composition can be used satisfactorily as a floppy disk device. It had mechanical strength and dimensional accuracy of 7.
実施例８゜
実施例７に於て、ガラスチョツプドストランドの配合量
を２０重量％とじ、引張強さ１１５０に！］／ｃｍ２、
曲げ弾性率６１ 、 ＯＯＯｋｇ、／ｃｍ２、流れ方向
熱膨張係数２ 、９ Ｘ’ Ｉ Ｑ −６ｃｍ／ｃｍ
／’Ｃ１熱膨張係数比１．２４．流れ方向成形収縮率０
．３０％、成形収縮率比１．３３、熱変形温度２３２℃
の合成樹脂組成物を１りた。Example 8゜In Example 7, the blended amount of glass chopped strands was reduced to 20% by weight, resulting in a tensile strength of 1150! ]/cm2,
Flexural modulus: 61, OOOkg,/cm2, Coefficient of thermal expansion in machine direction: 2, 9 X'IQ -6cm/cm
/'C1 thermal expansion coefficient ratio 1.24. Machine direction molding shrinkage rate 0
．． 30%, molding shrinkage ratio 1.33, heat distortion temperature 232℃
One synthetic resin composition was used.
前記合成樹脂組成物にＪ：つで成形されたシャーシはロ
ツピーディスク装置として満足しｊｑる１浅域的強度及
び寸法精度を有するものであった。The chassis molded from the synthetic resin composition had shallow area strength and dimensional accuracy that were satisfactory for a rotary disk device.
比較例１゜
中粘度タイプの一般射出成形用ポリカーボネー１へ樹脂
（余人、パンライ］−Ｌ−１２５０）に対してシランカ
ップリング処理した繊Ｉｆｆ ｆｉ ３〜６ｍｍのガラ
スチョツプドストランド３０重量％を配合し、引張強さ
１３２０ ｋｇ／ｃｍ２、曲げ弾性率７６、ＯＯＱ ｋ
ｇ／ ｃｍ’ 、流れ方向熱膨張係数２．ｌＸ１０−’
ｃｍ／ｃｍ／℃、熱ａｎｒｉ係数比１．８６、流し方向
成形収縮率０．２４％、成形収縮率比１．７５、熱変形
温度１４８℃の合成樹脂組成物を得た。Comparative Example 1 Medium viscosity type polycarbonate 1 for general injection molding Resin (Yojin, Panrai) -L-1250) Silane coupling treated fiber Iff fi 3-6 mm glass chopped strand 30% by weight The tensile strength is 1320 kg/cm2, the flexural modulus is 76, and the OOQ k
g/cm', coefficient of thermal expansion in the machine direction 2. lX10-'
A synthetic resin composition was obtained with a thermal anri coefficient ratio of 1.86, a molding shrinkage ratio of 0.24% in the flow direction, a molding shrinkage ratio of 1.75, and a heat distortion temperature of 148°C.
前記合成樹脂組成物によって成形されたシャーシは、フ
ロッピーディスク装置として満足し得る寸法精度を有し
ていなかった。The chassis molded from the synthetic resin composition did not have sufficient dimensional accuracy as a floppy disk device.
比較例２゜
比較例１に於てガラスチョツプドストランドの配合量を
２０重量％とじ新たに１５重量％のタルクを配合し、引
張強さ９４０ｋｇ／ｃｍ２、曲げ弾性率５９ 、 ＯＯ
ＯｋＱ／ｃｍ’ 、流れ方向熱膨張係数２゜８ ｘ １
０ −’ ｃｍ／ｃｍ／℃、熱膨張係数比１．８６、流
れ方向成形収縮率０．２８％、成形収縮率比１゜６４、
熱変形温度１４５℃の合成樹脂組成物を１１だ。Comparative Example 2゜In Comparative Example 1, the blending amount of glass chopped strands was increased to 20% by weight, and 15% by weight of talc was newly blended, resulting in a tensile strength of 940 kg/cm2 and a flexural modulus of 59, OO.
OkQ/cm', coefficient of thermal expansion in the flow direction 2°8 x 1
0-' cm/cm/℃, thermal expansion coefficient ratio 1.86, machine direction molding shrinkage rate 0.28%, molding shrinkage rate ratio 1°64,
11 is a synthetic resin composition with a heat distortion temperature of 145°C.
前記合成樹脂組成物によって成形されたシト一シは、フ
ロッピーディスク装置として満足し得る機械的強度及び
寸法精度を有するものではなかった。The sheet molded from the synthetic resin composition did not have sufficient mechanical strength and dimensional accuracy as a floppy disk device.
比較例３゜
一般グレード変成ＰＰＯ樹脂（ＥＰＬ、ノリル７３１Ｊ
）に対してシランカップリング処ｉ１ した繊維長３〜
６１１１ｍのガラスチョツプドストランド３０重量％を
配合し、引張強さ１１８０ ｋ（１／ ｃｍ２、曲げ弾
性率６５ 、０００ｋｑ／ｃｍ’ 、流れ方向熱膨張係
数２ 、３ Ｘ １０ −５ａｍ／ｃｍ／℃、熱膨張係
数比２．０４、流れ方向成形収縮率０．２４％、成形収
縮率比１．８３、熱変形温度１４０℃の合成樹脂組成物
を得た。Comparative Example 3 General grade modified PPO resin (EPL, Noryl 731J
) with silane coupling treatment i1 fiber length 3 ~
Contains 30% by weight of 6111 m glass chopped strands, tensile strength 1180 k (1/cm2, flexural modulus 65,000 kq/cm', coefficient of machine direction thermal expansion 2,3 x 10-5 am/cm/°C A synthetic resin composition having a thermal expansion coefficient ratio of 2.04, a machine direction molding shrinkage ratio of 0.24%, a molding shrinkage ratio of 1.83, and a heat distortion temperature of 140°C was obtained.
前記合成樹脂組成物によって成形されたシャーシは、フ
ロッピーディスク装置として満足し臂る寸法精度を有す
るものではなかった。The chassis molded from the synthetic resin composition did not have sufficient dimensional accuracy for a floppy disk device.
比較例４゜
自己消火性へＢＳ樹脂（日本合成ゴム、ＪＳＲＮＣｌ
００）に対してシランカップリング処理したｌＩ＋ｔ（
Ｃ長３〜５ｎｏ＋＋のガラスチョツプドストランド３０
重量％を配合し、引張強さ１１２０ｋＱ／ａｍ２、曲げ
弾性率５８，０００、流れ方向熱膨張係数２゜５ Ｘ
１０−５ｃｍ／ｃｍ／℃、熱膨張係数比１．９６、流れ
方向成形収縮率０．２８％、成形収縮率比１゜７５、熱
変形温度１３０℃の合成樹脂組成物を得ｌこ。Comparative Example 4 BS resin (Japan Synthetic Rubber, JSRNCl) to self-extinguishing property
lI+t(00) treated with silane coupling
Glass chopped strand 30 with C length 3~5no++
% by weight, tensile strength 1120 kQ/am2, flexural modulus 58,000, coefficient of thermal expansion in machine direction 2゜5
A synthetic resin composition was obtained with a thermal expansion coefficient ratio of 1.96, a molding shrinkage ratio of 0.28% in the machine direction, a molding shrinkage ratio of 1°75, and a heat distortion temperature of 130°C.
前記合成樹脂組成物によって成形されたシャーシは、フ
ロッピーディスク装置として満足し得る寸法精度を有す
るものではなかった。The chassis molded from the synthetic resin composition did not have sufficient dimensional accuracy as a floppy disk device.
比較例５゜
ボリアリレー１〜樹脂（ユニデカ、ＵポリマーＵ−１０
０）に対してシランカップリング処理したＩＩ Ｍｔ長
３〜５ｍｍのガラスチョツプドストランド３０重量％配
合し、引張強さ１２２０ ｋｇ／ｃｎ＋２、曲げ弾性率
５９，０００、流れ方向熱膨張係数２゜４、熱膨張係数
比２．０１流れ方向成形収縮率０゜２８％、成形収縮率
比１．７５、熱変形温度２４４℃の合成樹脂組成物を得
た。Comparative Example 5゜Boria Relay 1~Resin (Unideca, U Polymer U-10
0) is blended with 30% by weight of II glass chopped strands having a silane coupling treatment and a Mt length of 3 to 5 mm, with a tensile strength of 1220 kg/cn+2, a flexural modulus of elasticity of 59,000, and a coefficient of thermal expansion in the machine direction of 2°. 4. A synthetic resin composition was obtained having a thermal expansion coefficient ratio of 2.01, a molding shrinkage ratio in the machine direction of 0.28%, a molding shrinkage ratio of 1.75, and a heat distortion temperature of 244°C.
前記、した合成樹脂組成物によって成形されたシャーシ
は、フロッピーディスク装置として満足し１ｑる寸法精
度を有するものではなかった。The chassis molded from the synthetic resin composition described above did not have a dimensional accuracy of 1q which was satisfactory for a floppy disk device.
前記実施例及び比較例を基に本発明を更に詳細に説明す
ると、先ずベースとなる合成樹脂は非結晶性でしかも難
燃性が高いことが好ましい。To explain the present invention in more detail based on the above examples and comparative examples, first, it is preferable that the base synthetic resin is non-crystalline and has high flame retardancy.
これは、一般にエンシアリングプラスチックとして広く
利用されているナイロン、ポリアセタール等の結晶性の
合成樹脂は、成形時の収縮率が高く、更に成形後時効に
よる寸法変化も生ずるので、高寸法精度が要求されるフ
ロッピーディスク装置のシャーシを成形するには適合し
ない為である。This is because crystalline synthetic resins such as nylon and polyacetal, which are generally widely used as en-searing plastics, have a high shrinkage rate during molding and also undergo dimensional changes due to aging after molding, so high dimensional accuracy is required. This is because it is not suitable for molding the chassis of floppy disk drives.
したがってベースとなる合成樹脂として、ポリカーボネ
ート、ノリル、自己消火性Δ［３８，ｕポリマー等の非
結晶性でしかも難燃性の高い合成樹脂を利用した。Therefore, as the base synthetic resin, a non-crystalline and highly flame-retardant synthetic resin such as polycarbonate, noryl, and self-extinguishing Δ[38,u polymer was used.
前記した如き合成樹脂は一般にハウジング等に利用され
るものでフロッピーディスク装置のシャーシの如き高機
能が要求されるものの成形には適合しないものであった
。The above-mentioned synthetic resins are generally used for housings and the like, and are not suitable for molding materials that require high functionality, such as the chassis of floppy disk drives.
したがって前記した如き合成樹脂は何らかの補強がなさ
れて始めてシャーシの成形に適合するものとなるので補
強材の配合による補強について種々検討を行った。Therefore, since the synthetic resin described above becomes suitable for molding the chassis only after some kind of reinforcement is applied, various studies were conducted on reinforcement by adding reinforcing materials.
一般に合成樹脂の補強はガラスＩｌｉ維によって行われ
ており、先ずガラス繊維で補強した合成樹脂組成物によ
ってシャーシを形成した結果が比較例に示されている。Generally, synthetic resin is reinforced with glass Ili fibers, and comparative examples show the results of forming a chassis using a synthetic resin composition reinforced with glass fibers.
その結果によると、ガラス繊維の補強効果によって引張
強さ、曲げ弾性率等の機械的強度はフロッピーディスク
装置のシャーシとして適合する程度にまで向上している
が、熱膨張係数及び成形収縮率に方向性が顕著に示され
、流れ方向に対して流れに対して直角方向の値は２倍も
しくはそれに近くなっており、フロッピーディスク装置
として満足することの出来るような高い寸法精度のもの
を得ることは出来なかった。According to the results, the mechanical strength such as tensile strength and flexural modulus has been improved to the extent that it is suitable for the chassis of a floppy disk device due to the reinforcing effect of glass fiber, but the coefficient of thermal expansion and molding shrinkage rate have improved. The value in the direction perpendicular to the flow direction is twice or close to that of the flow direction, and it is difficult to obtain a high dimensional accuracy that can be satisfied as a floppy disk device. I could not do it.
また、ガラス繊維単体での補強による前記した如き欠点
を改良するためガラス＄８維に加えて一般に補強材とし
て利用されているタルクをも配合した合成樹脂組成物を
利用した結果が比較例２に示されているが、この場合は
、機械的強度に対する補強効果が十分でなく、更に熱膨
張係数及び成形収縮率の方向性に対する改善も殆ど認め
られず、フロッピーディスク装置として満足出来るよう
なシャーシを得ることは出来なかった。In addition, in order to improve the above-mentioned drawbacks caused by reinforcing glass fiber alone, Comparative Example 2 shows the results of using a synthetic resin composition containing talc, which is generally used as a reinforcing material, in addition to glass $8 fiber. However, in this case, the reinforcing effect on mechanical strength was not sufficient, and furthermore, there was almost no improvement in the direction of thermal expansion coefficient and molding shrinkage rate, making it difficult to create a chassis that would be satisfactory as a floppy disk device. I couldn't get it.
これに対して、ガラス５ｕｉｔに加えて金雲母を配合し
た実施例では、引張強ざ、曲げ弾性率等の機械的強度に
対する十分な補強効果が認められ、更に熱膨張係数及び
成形収縮率の方向性も、流れ方向に対して流れに対して
直角方向の値が１．２〜１．３倍程度とかなり改善され
、フロッピーディスク装置として満足することの出来る
高い寸法精度と機械的強度を持ったシャーシが得られた
。On the other hand, in the example in which phlogopite was blended in addition to 5 units of glass, a sufficient reinforcing effect on mechanical strength such as tensile strength and flexural modulus was observed, and also in the direction of thermal expansion coefficient and molding shrinkage rate. The performance has also been significantly improved, with the value in the direction perpendicular to the flow direction being about 1.2 to 1.3 times, and it has high dimensional accuracy and mechanical strength that are satisfactory for a floppy disk device. Got the chassis.
補強材として配合される雲母は、偏平な薄片でしかも機
械°的強度が高いことに特徴があるが、厚さに対する直
径の比すなわちアスペクト比が高いと補強効果が大とな
り、また結合水の含有量が低く、しかもこの放出温度が
高いと成形時に放出されろ水分の影響で成形品の物性が
低下する恐れもなく好都合である。Mica, which is used as a reinforcing material, is characterized by its flat flakes and high mechanical strength.The reinforcing effect is greater when the ratio of the diameter to the thickness, that is, the aspect ratio, is high, and the content of bound water increases. When the amount is low and the release temperature is high, there is no fear that the physical properties of the molded product will deteriorate due to the influence of moisture released during molding, which is advantageous.
したがって配合する雲母のアスペクト比は１０以上、好
ましくは３０以上である。Therefore, the aspect ratio of the mica to be blended is 10 or more, preferably 30 or more.
化学式１く。Ｍ ｇ４．１ｚ Ｆ Ｊ、＋ｂ Ａ ｌ
ｏ、ｖｓ ［Ｓ １５．ｑｓ Ｏｘ。Chemical formula 1. M g4.1z F J, +b A l
o, vs [S 15. qs Ox.
Ａ１７．２ｇ］（ＯＨ）４で表されるカナダ産金雲母は
、引張強度２．３２〜２．６０ｘ １０６ｋｇ／ｃｍ２
と機械的強度が高く、平均含水量は、結合水１．０１％
、吸着水０．０２％で、白雲母の４．１２％及び０．２
６％、−設合雲母の３．１２％及び０゜２５％Ｊ：りも
はるかに低く、また結合水放出調度は５５０℃で、白雲
母の４００℃、−設合雲母の１５０℃よりはるかに高く
、更にＭ間性に富んで容易に高アスペクト比の粉末が１
ｑ易く、前記した如き条件を満す雲母である。A17.2g] (OH)4 Canadian phlogopite has a tensile strength of 2.32-2.60x 106kg/cm2
The mechanical strength is high, and the average water content is 1.01% bound water.
, adsorbed water 0.02%, muscovite 4.12% and 0.2%
6%, 3.12% and 0°25% J for -joint mica, and the bound water release temperature is 550 °C, much more than 400 °C for muscovite and 150 °C for -joint mica. powder with a high aspect ratio, and also has a high aspect ratio of 1
It is a mica that is easy to use and satisfies the conditions described above.
次に合成樹脂に対するガラスＩｌｉ維及び雲母の配合量
についてであるが、ガラス繊組を２０〜３０重量％、雲
母を１０〜２５重量％配合するのが好ましく、これはガ
ラス繊組の配合量が増すと機械的強度は向上するものの
前記した方向性に関する欠点が強く現れ、雲母の配合量
を増すと成形性の関係等から必然的にガラス綴紐の配合
量が減少し機械的強度が低下するためである。Next, regarding the blending amount of glass Ili fibers and mica in the synthetic resin, it is preferable to blend 20 to 30% by weight of glass fiber and 10 to 25% by weight of mica. Although the mechanical strength improves when the amount of mica is increased, the drawbacks related to the directionality mentioned above become more apparent, and when the amount of mica compounded increases, the amount of glass binding cords mixed inevitably decreases due to moldability, etc., and the mechanical strength decreases. It's for a reason.
尚前記したガラスＩＩ Ｉｆｎと雲母を配合した合成樹
脂組成物によるシャーシの成形に於て１Ｊ１従来のガラ
スＩＩ維配合合成樹脂の成形時のような著しい成形性の
低下や成形機及び金型の激しい損傷も認められず良好な
状態であった。Furthermore, when molding a chassis using a synthetic resin composition containing glass II Ifn and mica as described above, the moldability deteriorates significantly and the molding machine and mold are severely damaged, unlike when molding the conventional glass II fiber-blended synthetic resin. It was in good condition with no visible damage.
（効果）
本発明は前記した如くフロッピーディスク装置のシャー
シの合成樹脂化を可能とし、これにＪ：り装置の１量化
、材料費及び加工費の削減によるコストの低下が計られ
る。(Effects) As described above, the present invention makes it possible to use synthetic resin for the chassis of a floppy disk device, and in this way, it is possible to reduce costs by integrating the J-type device and reducing material costs and processing costs.
Claims (1)
合成樹脂組成物にて成形したことを特徴とするフロッピ
ーディスク装置のシャーシ。A chassis for a floppy disk device, characterized in that it is molded from a synthetic resin composition in which glass fiber and mica are blended with an amorphous thermoplastic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24325284A JPS61123082A (en) | 1984-11-20 | 1984-11-20 | Chassis of floppy disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24325284A JPS61123082A (en) | 1984-11-20 | 1984-11-20 | Chassis of floppy disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61123082A true JPS61123082A (en) | 1986-06-10 |
Family
ID=17101101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24325284A Pending JPS61123082A (en) | 1984-11-20 | 1984-11-20 | Chassis of floppy disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61123082A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02173047A (en) * | 1988-12-26 | 1990-07-04 | Polyplastics Co | Fiber-reinforced thermoplastic resin composition |
| WO2013137375A1 (en) * | 2012-03-14 | 2013-09-19 | ユーエムジー・エービーエス株式会社 | Plated plastic chassis |
-
1984
- 1984-11-20 JP JP24325284A patent/JPS61123082A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02173047A (en) * | 1988-12-26 | 1990-07-04 | Polyplastics Co | Fiber-reinforced thermoplastic resin composition |
| WO2013137375A1 (en) * | 2012-03-14 | 2013-09-19 | ユーエムジー・エービーエス株式会社 | Plated plastic chassis |
| JP2013189690A (en) * | 2012-03-14 | 2013-09-26 | Umg Abs Ltd | Plated plastic chassis |
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