JPH049122B2 - - Google Patents
Info
- Publication number
- JPH049122B2 JPH049122B2 JP59133843A JP13384384A JPH049122B2 JP H049122 B2 JPH049122 B2 JP H049122B2 JP 59133843 A JP59133843 A JP 59133843A JP 13384384 A JP13384384 A JP 13384384A JP H049122 B2 JPH049122 B2 JP H049122B2
- Authority
- JP
- Japan
- Prior art keywords
- metal powder
- flywheel
- pellets
- weight
- powder
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 46
- 229910052751 metal Inorganic materials 0.000 claims description 46
- 239000000843 powder Substances 0.000 claims description 46
- 239000008188 pellet Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 8
- 229920005992 thermoplastic resin Polymers 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 238000007796 conventional method Methods 0.000 claims description 4
- 238000004898 kneading Methods 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 230000005484 gravity Effects 0.000 description 11
- 238000001746 injection moulding Methods 0.000 description 11
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 238000002156 mixing Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 238000000465 moulding Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000004663 powder metallurgy Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000006087 Silane Coupling Agent Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical group C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0013—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fillers dispersed in the moulding material, e.g. metal particles
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
＜発明の目的＞
産業上の利用分野
本発明は複合フライホイルの製造方法に係り、
詳しくは、熱可塑性樹脂中に多量の金属粉末を配
合するのにも拘らず、金属粉末が均一に分散され
て混練でき、更に、ペレツト成型によつて金属粉
末の分散性が高められるため、常法による射出成
形によつて、慣性力が大きく小型のフライホイル
が量産できる複合フライホイルの製造方法に係
る。[Detailed description of the invention] <Object of the invention> Industrial application field The present invention relates to a method for manufacturing a composite flywheel,
Specifically, even though a large amount of metal powder is blended into the thermoplastic resin, the metal powder can be uniformly dispersed and kneaded, and furthermore, the dispersibility of the metal powder is improved by pellet molding, so it is always easy to use. The present invention relates to a method for manufacturing a composite flywheel, which allows mass production of small-sized flywheels with large inertial forces by injection molding using a method.
なお、ここで、録音再生機器とは一般のテープ
レコーダー、家庭用ステレオ、カーステレオ等の
音響機器のほか、コンピユーターの端末機器等を
示す。 Note that here, the recording/playback equipment refers to audio equipment such as general tape recorders, home stereos, and car stereos, as well as computer terminal equipment and the like.
従来の技術
従来から、テープレコーダー等の録音再生機器
には磁気テープ等の送給むらの緩和調整のために
フライホイルが用いられている。2. Description of the Related Art Conventionally, flywheels have been used in recording and reproducing devices such as tape recorders to alleviate uneven feeding of magnetic tapes and the like.
このフライホイルとしては一般には比重の大き
な金属の鋳造若しくは鍛造で製造されていたが、
この製造のものは鋳造等の造型工程の後に切削研
摩等のバランス加工が必要で製造工程がきわめて
はん雑であると共に、高価にならざるを得ない。 This flywheel was generally manufactured by casting or forging metal with a large specific gravity.
This manufactured product requires balancing processing such as cutting and polishing after a molding process such as casting, making the manufacturing process extremely complicated and expensive.
この点から、本発明社等は先に粉末冶金法によ
つて製造する場合は、鋳造組織と相違して、金属
粉末粒子間に微細なボイドを均一に分散生成させ
ることができ、また、このボイドによつてワウ・
フラツタを適切に調整でき、しかも、粉末冶金法
のために、切削研摩等のバランス加工の必要もな
いフライホイルを提案した（特公昭56−10698号
公報参照）。このフライホイルはワウ・フラツタ
の値がきわめて小さくなり優れたものであるが、
全体が高価な金属であり、粉末冶金法によつて製
造されるために、価格の点で問題が残つている。 From this point of view, the present inventors have found that when manufacturing by powder metallurgy first, unlike a cast structure, fine voids can be uniformly distributed between metal powder particles. Wow by Void
We proposed a flywheel that can appropriately adjust flutter and does not require balance processing such as cutting and polishing due to the powder metallurgy method (see Japanese Patent Publication No. 10698/1983). This flywheel is excellent because the wow and flutter values are extremely small.
Cost remains a problem since the entire structure is made of expensive metal and is produced by powder metallurgy.
また、近時は、電子技術の発達によつてテープ
レコーダー等の音響機器は小型化し、それに伴つ
て、小型のフライホイルが要求され、この小型化
による慣性モーメントの低下が最小限におさえら
れ、しかも、小型化によつて成型性がきわめて良
好なフライホイルが望まれている。 In recent years, with the development of electronic technology, audio equipment such as tape recorders has become smaller and smaller flywheels have been required. Moreover, there is a demand for flywheels that are miniaturized and have extremely good moldability.
更に、現在の如く、録音再生機器の小型化によ
つてそれに要求されるワウ・フラツタも機器の仕
様により様々であるが、おおむね0.05〜0.5％で
あつて、従来のものの如く0.15％以下の厳格な値
が必ずしも必要でなく、粉末冶金法によるものに
代つて、熱可塑性樹脂を加熱溶融し、射出成型し
た合成樹脂のフライホイルが用いられることが多
くなつている。 Furthermore, with the current miniaturization of recording and playback equipment, the wow and flutter required for it varies depending on the specifications of the equipment, but it is generally 0.05 to 0.5%, and is strictly below 0.15% as in the past. This value is not necessarily required, and instead of powder metallurgy, synthetic resin flywheels made by heating and melting thermoplastic resin and injection molding are increasingly being used.
すなわち、最近のモータは小型化する反面、出
力が大きくなり、従来に較べると、フライホイル
に対するワウ・フラツタの要求が苛酷でなくな
り、むしろ、最近は、ウオークマンに代表される
ようにテープレコーダー等の小型化、軽量化が進
み、それに伴つてフライホイルに対しても小型
化、軽量化、更に、経済性の要求が一層強まつて
いる。このところから合成樹脂製フライホイルが
用いられつつあるが、このフライホイルは、熱可
塑性樹脂に対し金属粉末を配合して所定の慣性力
を持たせたものである。しかし、金属粉末の比重
は合成樹脂のそれに比べるときわめて大きく、こ
のように比重差の大きい材料を均一に分散させて
混合するのがきわめてむづかしいため、金属粉末
の混合率はせいぜい50wt％か60wt％にとどまつ
ている。このため、フライホイルの性能向上のた
めに、金属粉末の混合率を高めることが要求され
るのにも拘らず、混合率を大巾に高めることがで
きない。 In other words, while recent motors have become smaller, their output has become larger, and compared to the past, the requirements for wow and flutter on flywheels have become less severe. As the size and weight of flywheels continue to grow, there is a growing demand for flywheels to be smaller, lighter, and more economical. From this point on, synthetic resin flywheels are being used, and these flywheels are made by blending metal powder with thermoplastic resin to impart a predetermined inertia force. However, the specific gravity of metal powder is extremely high compared to that of synthetic resin, and it is extremely difficult to uniformly disperse and mix materials with such a large difference in specific gravity, so the mixing ratio of metal powder is at most 50wt% or 60wt%. remains. For this reason, although it is required to increase the mixing ratio of metal powder in order to improve the performance of the flywheel, the mixing ratio cannot be increased significantly.
発明が解決しようとする問題点
本発明は上記欠点の解決を目的とし、具体的に
は、熱可塑性樹脂に金属粉末を多量、つまり、70
〜95重量％配合するにも拘らず、多量の金属粉末
を全体にわたつて均一に分散でき、常法の射出成
型によつて、小型でかつワウ・フラツタが0.05〜
0.5％程度、更に、それ以下になる複合フライホ
イルを量産できる方法を提案する。Problems to be Solved by the Invention The present invention aims to solve the above-mentioned drawbacks. Specifically, the present invention aims to solve the above-mentioned drawbacks.
Even though it contains ~95% by weight, a large amount of metal powder can be uniformly dispersed throughout, and by injection molding using a conventional method, it is compact and has wow and flutter of ~0.05.
We propose a method for mass-producing composite flywheels with a content of about 0.5% or even less.
＜発明の構成＞
問題点を解決するための手段ならびにその作用
すなわち、本発明方法は、金属粉末70〜95重量
％と熱可塑性樹脂５〜30重量％とを加熱溶融して
衝撃力を加えつつ混練した後、冷却してペレツト
状に成形し、その後、これらペレツトを再び溶融
混練し、常法で射出成形してフライホイルを製造
することを特徴とする。<Structure of the Invention> Means for Solving the Problems and Their Effects That is, the method of the present invention involves heating and melting 70 to 95% by weight of metal powder and 5 to 30% by weight of thermoplastic resin while applying an impact force. After kneading, the pellets are cooled and formed into pellets, and then these pellets are melt-kneaded again and injection molded using a conventional method to produce a flywheel.
そこで、上記構成ならびにその作用について具
体的に説明すると、次の通りである。 Therefore, the above configuration and its operation will be specifically explained as follows.
まず、例えば、70〜95重量％（以下、単に％と
いう。）の金属粉末と５〜30％の熱可塑性樹脂
（以下、単に樹脂という。）との混合材料を、スク
リユー等を具える混練機で加熱溶融しつつ混練す
る。この間、混合材料には衝撃力を加えて溶融時
のガス抜けを促進するとともに金属粉末の分散を
促進し、混練後、冷却してペレツト状に成型し、
これによつて金属粉末の分散性を一層高める。 First, a mixed material of, for example, 70 to 95% by weight (hereinafter simply referred to as %) metal powder and 5 to 30% thermoplastic resin (hereinafter simply referred to as resin) is mixed in a kneading machine equipped with a screw, etc. Knead while heating and melting. During this time, an impact force is applied to the mixed material to promote gas release during melting and to promote dispersion of the metal powder. After kneading, the mixed material is cooled and formed into pellets.
This further improves the dispersibility of the metal powder.
一般に、フライホイルとしての慣性力を大きく
するのには、なるべく金属粉末の混合率を高める
ことが必要で、これに併せて、多量の金属粉末の
分散性を高めることが必要になり、分散性を無視
して金属粉末の混合率をいくら高めてもフライホ
イルの性能を向上させることはむづかしい。しか
し、磁性粉と樹脂とから成る複合材料の製造で知
られる如く、比重差の大きい両材料は、加熱溶融
しても均一に分散混合することはきわめてむづか
しく、上記のいずれかの条件が損なわれる。 Generally, in order to increase the inertial force of a flywheel, it is necessary to increase the mixing ratio of metal powder as much as possible, and in conjunction with this, it is necessary to increase the dispersibility of a large amount of metal powder. Ignoring this, it is difficult to improve the performance of the flywheel no matter how much you increase the mixing ratio of metal powder. However, as is known in the production of composite materials consisting of magnetic powder and resin, it is extremely difficult to uniformly disperse and mix the two materials, which have a large difference in specific gravity, even when heated and melted, and if any of the above conditions are met. be damaged.
この点から、本発明では、金属粉末と樹脂との
混練プロセスにおいて、混練機の剪断作用にのみ
依存することなく衝撃力を加えて金属粉末の分散
性を高めると共に、溶融時のガス抜けを促進す
る。この衝撃力はこの混練機の一部に衝撃ゾーン
を設けたり、混練機内の材料に対して上部から与
えることができるが、そのほか、いずれの方法
（従来例）でも与えることができる。また、この
混練材料は冷却破砕してペレルト化し、これらペ
レツトを溶融し再び混練して金属粉末の分散性を
高め、高圧力下で常法によつて射出成型してフラ
イホイルを製造する。 From this point of view, in the present invention, in the kneading process of metal powder and resin, impact force is applied without relying solely on the shearing action of the kneader to improve the dispersibility of the metal powder and promote gas release during melting. do. This impact force can be applied by providing an impact zone in a part of the kneading machine or by applying it to the material inside the kneading machine from above, or by any other method (conventional example). Further, this kneaded material is cooled and crushed to form pellets, these pellets are melted and kneaded again to improve the dispersibility of the metal powder, and the flywheel is manufactured by injection molding under high pressure by a conventional method.
すなわち、比重の大きい金属粉末を多量に樹脂
中に混合する場合、従来例の混練機のスクリユー
等の剪断力にのみ依存すると、過剰の金属粉末が
比重差で偏析し、更に、溶融時のガス抜けが不十
分のため、多量の金属粉末を均一に分散させるこ
とがきわめてむづかしい。従つて、金属粉末を均
一に分散させる上には、ペレツト製造の前にも、
比重によつて金属粉末が分離することなく、溶融
時のガス抜けを良好に行ないつつ、均一に混練さ
せる必要があり、単に、原料を混合溶融するとと
もに、このときに衝撃力を与えて練り上げ、樹脂
と金属粉末とで相当の比重差があつても、金属粉
末を均一に分散させ、更に、このときのガス抜け
を良好にして混練する。 In other words, when mixing a large amount of metal powder with a high specific gravity into a resin, if you rely only on the shearing force of the screw in the conventional kneading machine, the excess metal powder will segregate due to the difference in specific gravity, and furthermore, the gas during melting will Due to insufficient ejection, it is extremely difficult to uniformly disperse a large amount of metal powder. Therefore, in addition to uniformly dispersing metal powder, it is necessary to
It is necessary to uniformly knead the metal powder without separating it due to its specific gravity and with good gas release during melting. Even if there is a considerable difference in specific gravity between the resin and the metal powder, the metal powder is uniformly dispersed, and furthermore, the kneading is performed with good gas release.
また、金属粉末の混合率が高いと、混練機にお
いて原料が混練しつつ送られるときに、例えば、
シリンダ等の外匣の内壁面や、スクリユー、ブレ
イド等の撹拌部分に原料が付着し、激しく摩滅す
る危険がある。この付着や摩滅は原料中の金属粉
末が多いほど激しいが、上記の如く、衝撃力を加
えつつ混練すると、金属粉末は95％以下まで配合
できる。金属粉末の比重によつても変化するが、
テープレコーダー等に要求されるワウ・フラツタ
を得るには、金属粉末を70％以上配合しないと、
得られない。 In addition, if the mixing ratio of metal powder is high, when the raw materials are fed while being kneaded in the kneader, for example,
There is a risk that raw materials will adhere to the inner wall surface of the outer box such as the cylinder, or the stirring parts such as the screw or blade, causing severe abrasion. This adhesion and abrasion are more severe as the amount of metal powder in the raw materials increases, but if the material is kneaded while applying an impact force as described above, the metal powder can be blended to 95% or less. Although it varies depending on the specific gravity of the metal powder,
In order to obtain the wow and flutter required for tape recorders, etc., it is necessary to mix 70% or more of metal powder.
I can't get it.
また、ペレツトに成型するのには、原料を混練
後通常３mm程度の線状に押出成型してから冷却
し、その後、これを破砕機で破砕するのが好まし
い。 In order to form pellets, it is preferable to knead the raw materials, extrude them into a linear shape of about 3 mm, cool them, and then crush them with a crusher.
また、金属粉末の粒子はなるべく細かいものが
好ましいが、あまり細かいとかえつて均一に分散
させることがむづかしくなる。しかし、粒子径が
あまり大きいと、予め、ペレツトをつくつて樹脂
中の金属粒子の分散性を高める意味がなく、実例
例にも示す通り、径３mm程度の如く、適正粒子に
調整するのが好ましい。 Further, it is preferable that the metal powder particles be as fine as possible, but if they are too fine, it becomes difficult to uniformly disperse them. However, if the particle size is too large, there is no point in making pellets in advance to improve the dispersibility of the metal particles in the resin.As shown in the examples, it is preferable to adjust the particle size to an appropriate size, such as about 3 mm in diameter. .
次に、以上の通りに所定の粒度に調整されたペ
レツトを、通常の射出成型機を用いて射出成型に
よりフライホイルを成型するが、この場合も、こ
の射出成型機中で再び加熱溶融混練し、金属粉末
の分散性は更に高められる。すなわち、射出成型
法は樹脂一般に行なわれている方法として行なう
ことができるが、このように射出成型しても、多
量の金属粉末が配合されていても、上記の如く、
金属粉末と樹脂とは衝撃力を与えて均一に混合さ
れ、しかも、適正粒度にペレツト化されているた
め、分散性が十分に保持されている。このため、
射出成型における混練の間にガス抜け不良などの
問題がなく、成型時に成型ダイに過剰の摩耗を与
えることもなく、成型されるフライホイル中に金
属粉末が均一に分散され、良好な慣性性能を持つ
フライホイルが得られる。 Next, the pellets adjusted to a predetermined particle size as described above are injection molded into a flywheel using a normal injection molding machine. , the dispersibility of the metal powder is further improved. In other words, the injection molding method can be performed as a method commonly used for resins, but even if injection molding is performed in this way, even if a large amount of metal powder is blended, as described above,
The metal powder and resin are mixed uniformly by applying an impact force, and are pelletized to an appropriate particle size, so that the dispersibility is sufficiently maintained. For this reason,
There are no problems such as poor gas release during kneading during injection molding, there is no excessive wear on the molding die during molding, and the metal powder is uniformly dispersed in the molded flywheel, resulting in good inertial performance. You will get a flyfoil to hold.
なお、熱可塑性樹脂は代表的にはポリオレフイ
ン樹脂、塩化ビニル樹脂、ポリアセタール樹脂、
ポリアミド樹脂、ポリカーボネート樹脂等である
が、これらの各種共重合体および変性体も含まれ
るが、この中で粘性等の点からナイロンが最も好
ましい。 Note that thermoplastic resins are typically polyolefin resins, vinyl chloride resins, polyacetal resins,
These include polyamide resins, polycarbonate resins, etc., and also include various copolymers and modified products thereof, but among these, nylon is most preferred from the viewpoint of viscosity and the like.
また、金属粉末としては最終製品によるフライ
ホイルの性能の点からFe、Zn、Sn、Pb、Cuお
よびその合金等の粉末が用いられるが、価格の点
からFe粉が最も好ましく、更に、樹脂、金属粉
末のほかに、これらの性質に対応するシランカツ
プリング剤等を添加することもできる。 In addition, as the metal powder, powders such as Fe, Zn, Sn, Pb, Cu, and their alloys are used from the viewpoint of the performance of the flywheel as a final product, but Fe powder is the most preferable from the viewpoint of cost. In addition to the metal powder, a silane coupling agent or the like corresponding to these properties can also be added.
実施例
そこで、実施例１について説明すると、次の通
りである。Example Example 1 will be explained as follows.
実施例 １
樹脂（ナイロン−６）20重量部と鉄粉（平均粒
径53μｍ）80重量部とに対してシランカツプリン
グ剤Ａ−1100（日東ユニカー(株)製）を１重量部を
添加し、これを温度250℃で加熱して溶融して混
練し、この混練の間に所定のインターバルで衝撃
力を与えて混練を行なつた。その後、これを冷却
してから破砕して径３mmφ程度のペレツトに成型
した。また、比較のために、上記のところと同じ
条件で衝撃力を加えることなく、ペレツトを成型
し、両ペレツト内の鉄粉の分散性を顕微鏡でしら
べたところ、比較例のペレツトでは微細な孔〓が
残り、鉄粉が局部的に凝集して分散性が損なわれ
ていた。これに対し、本発明に係るペレツトは鉄
粉は全く凝集することなく、ガス抜けが良好であ
るため、微細孔〓が全く存在しなかつた。Example 1 1 part by weight of silane coupling agent A-1100 (manufactured by Nitto Unicar Co., Ltd.) was added to 20 parts by weight of resin (nylon-6) and 80 parts by weight of iron powder (average particle size 53 μm). This was heated at a temperature of 250°C to melt and knead, and during this kneading, impact force was applied at predetermined intervals to perform kneading. Thereafter, this was cooled and crushed to form pellets with a diameter of about 3 mmφ. For comparison, pellets were molded under the same conditions as above without applying impact force, and the dispersibility of iron powder in both pellets was examined using a microscope. 〓 remained, and the iron powder was locally agglomerated, impairing its dispersibility. On the other hand, in the pellets according to the present invention, the iron powder did not aggregate at all and gas release was good, so that there were no micropores at all.
次に、この本発明に係るペレツトを乾燥後、ス
クリユー型射出成型機でシリンダ加熱温度255℃、
金型温度80℃、射出圧力850Kg／cm2で、再び、溶
融混練し、径43.9mmの円板状のフライホイルを射
出成形した。 Next, after drying the pellets according to the present invention, the cylinder was heated at a temperature of 255°C using a screw-type injection molding machine.
The mixture was melt-kneaded again at a mold temperature of 80° C. and an injection pressure of 850 Kg/cm 2 to injection mold a disc-shaped flywheel with a diameter of 43.9 mm.
このフライホイルの比重は3.8ｇ／cm2であつて、
このワウ・フラツタは0.3％程度であり、全体に
わたつて均一に鉄粉が分散されていた。なお、比
較例に係るペレツトでも同様に再び加熱溶融して
射出成型したところ、得られるフライホイルの周
縁部と中心部とに局部的に鉄粉が集まり、ワウ・
フラツタの値が悪化した。 The specific gravity of this flywheel is 3.8g/ cm2 ,
This wow and flutter was about 0.3%, and the iron powder was uniformly dispersed throughout. In addition, when the pellets according to the comparative example were similarly heated and melted again and injection molded, iron powder locally gathered on the periphery and center of the resulting flywheel, resulting in wow.
The value of flats has worsened.
実施例 ２
メルトインデツクス6.0、比重0.95のポリエチ
ン樹脂３〜35重量部に対して鉄粉（平均粒径53μ
ｍ）65〜97重量部およびシランカツプリング剤Ａ
−174（日東ユニカー製品）１重量部を混合し、
154℃で溶融し、実施例１と同様に、衝撃力を加
えつつ混練し、径３mmφ程度のペレツトをつくつ
た。これら各種ペレツトにつき鉄粉の分散性をし
らべたところ、何れのものも良好であつたが、鉄
粉95重量部以上では均一に混練することがむづか
しく、70重量部以下のものは混練時に鉄粉がやや
分離する傾向にあつた。その後、各ペレツトをス
クリユー型射出成型機でシリンダ温度150℃、金
型温度50℃、射出圧力800Kg／cm2で、再び、加熱
溶融し、径43.9mmの円板状フライホイルに成形し
たところ、この比重は2.8〜6.0であつた。Example 2 Iron powder (average particle size 53μ
m) 65 to 97 parts by weight and silane coupling agent A
-174 (Nitto Unicar product) 1 part by weight was mixed,
The mixture was melted at 154° C. and kneaded while applying impact force in the same manner as in Example 1 to form pellets with a diameter of about 3 mmφ. When we examined the dispersibility of iron powder in these various pellets, all of them were found to be good, but it was difficult to mix uniformly with more than 95 parts by weight of iron powder, and with less than 70 parts by weight, it was difficult to mix uniformly. The iron powder tended to separate somewhat. After that, each pellet was heated and melted again using a screw-type injection molding machine at a cylinder temperature of 150°C, a mold temperature of 50°C, and an injection pressure of 800 kg/cm 2 and molded into a disc-shaped flywheel with a diameter of 43.9 mm. The specific gravity was 2.8 to 6.0.
また、この成型時に鉄粉95重量部以上のものは
押出圧力を高めてもやや成型性が劣化し、鉄粉70
重量部以下のものはフライホイルの中心部と周縁
部で鉄粉の分散性がやや異なり、ワウ・フラツタ
が0.45〜0.5％となつた。 In addition, during this molding, if the iron powder is 95 parts by weight or more, the moldability will deteriorate slightly even if the extrusion pressure is increased;
In the case of less than 1 part by weight, the dispersibility of iron powder was slightly different between the center and the periphery of the flywheel, and the wow and flutter was 0.45 to 0.5%.
＜発明の効果＞
以上詳しく説明した通り、本発明方法は、金属
粉末70〜95重量％と熱可塑性樹脂５〜30重量％と
を加熱溶融して混練する間に衝撃力を加えて混練
し、その後、冷却してペレツト化し、このペレツ
トを再び加熱溶融混練して、射出成型により、フ
ライホイルを製造する方法である。従つて、多量
の金属粉末を均一に分散させて高充填でき、とく
に、一次の混練時のガス抜けが良好になり、分散
性を高めることができる。分散性を高めて混練
後、更に、ペレツトをつくり、これを再び溶融混
練して射出成型するため、金属粉末の分散性が高
められ、金属粉末が多量に配合されるにも拘ら
ず、慣性力があるフライホイルを大量にかつ経済
的に製造できる。<Effects of the Invention> As explained in detail above, the method of the present invention includes heating and melting 70 to 95% by weight of the metal powder and 5 to 30% by weight of the thermoplastic resin and kneading them by applying an impact force while kneading them. Thereafter, the pellets are cooled and pelletized, and the pellets are again heated, melted and kneaded, and then injection molded to produce a flywheel. Therefore, a large amount of metal powder can be uniformly dispersed and highly packed, and in particular, gas release during the primary kneading can be improved and dispersibility can be improved. After increasing the dispersibility and kneading, pellets are made, which are then melted and kneaded again for injection molding, which increases the dispersibility of the metal powder and reduces the inertial force even though a large amount of metal powder is mixed. It is possible to economically produce large quantities of flywheels with a
また、金属粉末の種類やその配合量を所望に応
じて調整することにより、種々の特性の複合フラ
イホイルが得られる。 Further, by adjusting the type of metal powder and its blending amount as desired, composite flywheels with various characteristics can be obtained.
Claims (1)
重量％とを加熱溶融して衝撃力を加えつつ混練し
た後、冷却してペレツト状に成形し、その後、こ
れらペレツトを再び溶融混練し、常法で射出成形
してフライホイルを製造することを特徴とする複
合フライホイルの製造方法。1 70-95% by weight of metal powder and 5-30% by weight of thermoplastic resin
% by weight and kneaded while applying an impact force, cooled and formed into pellets, then melted and kneaded these pellets again and injection molded using a conventional method to produce a flywheel. A method for manufacturing a characteristic composite flywheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13384384A JPS6111207A (en) | 1984-06-28 | 1984-06-28 | Manufacture of composite flywheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13384384A JPS6111207A (en) | 1984-06-28 | 1984-06-28 | Manufacture of composite flywheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6111207A JPS6111207A (en) | 1986-01-18 |
| JPH049122B2 true JPH049122B2 (en) | 1992-02-19 |
Family
ID=15114332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13384384A Granted JPS6111207A (en) | 1984-06-28 | 1984-06-28 | Manufacture of composite flywheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6111207A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2797812B2 (en) * | 1991-02-15 | 1998-09-17 | 松下電器産業株式会社 | Anti-vibration or cushioning material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59126131A (en) * | 1983-01-10 | 1984-07-20 | Hitachi Ltd | Mold formed fly wheel |
-
1984
- 1984-06-28 JP JP13384384A patent/JPS6111207A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59126131A (en) * | 1983-01-10 | 1984-07-20 | Hitachi Ltd | Mold formed fly wheel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6111207A (en) | 1986-01-18 |
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