JPS59195689A - Parts of plastic japanese style musical instrument - Google Patents
Parts of plastic japanese style musical instrumentInfo
- Publication number
- JPS59195689A JPS59195689A JP58069898A JP6989883A JPS59195689A JP S59195689 A JPS59195689 A JP S59195689A JP 58069898 A JP58069898 A JP 58069898A JP 6989883 A JP6989883 A JP 6989883A JP S59195689 A JPS59195689 A JP S59195689A
- Authority
- JP
- Japan
- Prior art keywords
- parts
- musical instrument
- plastic
- ivory
- japanese musical
- 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.)
- Granted
Links
Landscapes
- Reinforced Plastic Materials (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Stringed Musical Instruments (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、ポリエステル系複合材料からなる邦楽器部品
に関する。更に詳しくは、象牙製邦楽器部品と同様の音
色、外観及び感触を有する邦楽器部品に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to Japanese musical instrument parts made of polyester composite material. More specifically, the present invention relates to Japanese musical instrument parts that have the same tone, appearance, and feel as Japanese musical instrument parts made of ivory.
三味線の撥、駒、糸巻、間柱、琴爪等の邦楽器部品には
、良好な音色を演出するために高度の弾力性、適度な重
み、耐摩耗性、感触、バランス、並ひに、弦を損傷しな
いこと等が要求される。Japanese musical instrument parts such as the shamisen pick, bridge, bobbin, stud, kotozume, etc. have a high degree of elasticity, appropriate weight, abrasion resistance, feel, balance, and even strings in order to produce a good tone. It is required that there is no damage.
例えは、三味線の音色は含まれる倍音の状態によって決
るが、弦に幅広い（特に高音部）の振動を与えるには演
奏用具の撥の素材に高い弾性と適度の重量がなければな
らない。又、その感触の良否はデリケート、な動きを要
求される演奏者にとって大きな影響を及ぼし、又、絹糸
の弦の摩耗、損傷を防止するべく耐摩耗性と共に潤滑性
等が要求される。これらは演技又は補助的手段で補うこ
とか出来ない重要な要素である。For example, the tone of a shamisen is determined by the overtones contained in it, but in order to give the strings a wide range of vibrations (especially in the treble range), the material used to make the playing instrument's plectrum must have high elasticity and appropriate weight. Furthermore, the quality of the feel has a great influence on the performers who are required to perform delicate movements, and the silk strings are required to have abrasion resistance and lubricity to prevent wear and damage to the strings. These are important elements that can only be compensated for by acting or by supplementary means.
現在、邦楽器部品のこれらの要求に最も適合した材料と
して、象牙がある。特に、演奏会用等としては、三味線
の撥、駒、糸巻、及び間柱、琴爪客の邦楽器部品には専
ら象牙製品が使用されている。Currently, ivory is the material that best meets these requirements for parts of Japanese musical instruments. In particular, for concerts, ivory products are exclusively used for the plectrum, bridge, thread winding, and studs of shamisen, and parts of Japanese musical instruments for kotozumeka.
然しなから、象は過去数世紀に亘る乱獲から、今や僅少
動物となり、手厚い保護下におかれるに至り、象牙の採
取量は年々減少している。特に、三味線の撥のように、
大きな象牙製品の場合には大きな象牙を必要とし、１木
の象牙から採れる量に限度があるので象牙製邦楽器部品
の生産量は近イ「減少の一途をたどって来た。その結果
、今日では、象牙製邦楽器部品は極めて高価になり、入
手し難い状況となっている。However, due to overhunting over the past several centuries, elephants are now rare and are under strict protection, and the amount of ivory harvested is decreasing year by year. Especially, like the shamisen plectrum,
Large ivory products require large pieces of ivory, and there is a limit to the amount that can be harvested from one ivory tree, so the production of ivory parts for Japanese musical instruments has been steadily decreasing in recent years.As a result, today's Now, parts of Japanese musical instruments made of ivory have become extremely expensive and difficult to obtain.
−・方、練習用の木製品はもとより、象牙代替品には、
ＡＢＳ樹脂等の熱可塑性樹脂や尿素樹脂等の熱硬化性樹
脂があるが、これらの素材から得られる邦楽器部品は音
ｇ特性が象牙製品に比べてかなり劣り、満足なものでは
無かった。-In addition to wooden products for practice, there are also ivory substitutes.
There are thermoplastic resins such as ABS resin and thermosetting resins such as urea resin, but Japanese musical instrument parts made from these materials have considerably inferior sound g characteristics compared to ivory products, and are not satisfactory.
例えば、象牙製の三味線の撥と木製や合成樹′脂製のも
のを比較すると、三味線の音色で非常に大切な周波数の
高い倍音が象牙製品では多く含まれているのに対しこれ
ら代替品では少ない。その結果、木製や合成樹脂製の三
味線の撥は象牙製品のものに比べて音色が劣っている。For example, if you compare the plectrum of an ivory shamisen with one made of wood or synthetic resin, the ivory product contains many high-frequency overtones, which are very important for the tone of the shamisen, whereas these alternatives few. As a result, shamisen plectrums made of wood or synthetic resin have a poorer tone than those made of ivory.
かかる状況にあって、象牙製邦楽器部品と同様な音色、
感触、外観を有する邦楽器部品の開発が強く望まれてい
た。Under such circumstances, the tone similar to that of Japanese musical instrument parts made of ivory,
There was a strong desire to develop parts for Japanese musical instruments that had a good feel and appearance.
本発明は、象牙と同等の音色、感触、外観を有し、且つ
、安価に供給することが出来るプラスチック製邦楽器部
品を提供することを目的とする。An object of the present invention is to provide plastic parts for Japanese musical instruments that have the same tone, feel, and appearance as ivory, and can be supplied at low cost.
本発明者等は上記目的を達成すべく鋭意検討した結果、
ポリニスデル樹脂に繊維状充填剤、フッ素樹脂粉末及び
結晶化促進剤を配合した組成物を成形することにより象
牙と同様の特性を有するプラスチック製邦楽器部品が得
られる事実を見出し、本発明を完成した。As a result of intensive study to achieve the above object, the inventors of the present invention found that
The present invention was completed based on the discovery that plastic Japanese musical instrument parts having properties similar to those of ivory can be obtained by molding a composition containing polynisder resin, fibrous filler, fluororesin powder, and crystallization accelerator. .
即ち、本発明のプラスチ・ンク製邦楽器部品ｌよ、ポリ
エステル樹脂１００重量部、繊維状充填材６０〜１００
重に部、平均粒径が５０用ｍ以下のフ・ン素樹脂粉末１
０〜４０重量部、結晶化促進剤０．０５〜５重量部から
配合されてなり、且つ、比重が１．６０以上、曲げ弾性
率が１１０，０００〜２００，０００ ｋｇ／ ｉであ
ることを特徴とする。That is, for the plastink Japanese musical instrument part 1 of the present invention, 100 parts by weight of polyester resin, 60 to 100 parts by weight of fibrous filler.
Weight: 1 part, fluorocarbon resin powder with an average particle size of 50 m or less
0 to 40 parts by weight, a crystallization promoter of 0.05 to 5 parts by weight, a specific gravity of 1.60 or more, and a flexural modulus of 110,000 to 200,000 kg/i. Features.
以下において、本発明を更に詳しく説明する。In the following, the invention will be explained in more detail.
本発明で用いるポリエステル樹脂とは、テレフタル酩或
いはそのエステル形成性誘導体とジオール或いはそのエ
ステル形成性誘導体とを主成分とする縮合反応により得
られる重合体又は共重合体である。The polyester resin used in the present invention is a polymer or copolymer obtained by a condensation reaction containing terephthalic acid or an ester-forming derivative thereof and a diol or an ester-forming derivative thereof as main components.
共重合体は、通常、その酸成分の３０％以下が他の共重
合成分で置換したものが用いられる。The copolymer used usually has 30% or less of its acid component replaced with another copolymer component.
ノ（重合成分としての酸成分はフタル酸、インフタル酸
、アジピン酸、セパシン酸、ナフタレンジカルボン酸、
アントラセンジカルボン酸、シクロヘキサンジカルボン
酸及びこれらの組合せを、ジオール成分はエチレングリ
コール、トリメチレングリコール、テトラメチレングリ
コール、ヘキサメチレングリコール、デカメチレングリ
コール、ネオペンチルグリコール、／＼イドロキノン、
レジルシン、２．２−ビス（４−ヒドロキシフェニル）
フロパン、ビス（４−ヒドロキシフェニル）スルホン及
びこれらの組合せを挙げることが出来る。(Acid components as polymerization components include phthalic acid, inphthalic acid, adipic acid, sepacic acid, naphthalene dicarboxylic acid,
Anthracene dicarboxylic acid, cyclohexane dicarboxylic acid, and combinations thereof; diol components include ethylene glycol, trimethylene glycol, tetramethylene glycol, hexamethylene glycol, decamethylene glycol, neopentyl glycol, /hydroquinone;
Resircin, 2,2-bis(4-hydroxyphenyl)
Mention may be made of furopane, bis(4-hydroxyphenyl)sulfone and combinations thereof.
共重合体として、特に好ましくは、エチレンテレフタレ
ート単位又はブチレンテレフタレート単位を８０重量％
以上含むポリエステル樹脂か用Ｕ＼られる。Particularly preferably, the copolymer contains 80% by weight of ethylene terephthalate units or butylene terephthalate units.
Polyester resins containing the above are used.
ポリエステル樹脂の固有粘度［η］ ｊｆ通常０．４以
上とし、好ましくは０．５〜１．ｆ（とする。［ηコか
０．４より低いと十分な強度が得られず、破損しやすく
なるため好ましくない。−力、［η］力’、 １９．’
すぎると射出成形峙のスクリュー回転トルり力りｉ妬く
なり、スクリューが停止したり、喰し）込み不良を起し
易く、又、得られた成形品表面の外観力≦！思くなる。Intrinsic viscosity [η] jf of polyester resin is usually 0.4 or more, preferably 0.5 to 1. It is assumed that f([η] is less than 0.4, which is not preferable because sufficient strength cannot be obtained and it becomes easy to break. - force, [η] force', 19.'
If it is too high, the rotational torque of the screw in the injection molding section will be too strong, which may cause the screw to stop or bite defects, and the appearance of the surface of the resulting molded product will be less than or equal to 100%. It makes me think.
従って、実用上、１．６か上限となる。Therefore, in practice, the upper limit is 1.6.
尚、ここで固有粘度［η］とはフェノール／子］・ラク
ロロエタン＝５０１５０ （重量比）溶媒中２５°Ｃ
で測定した溶液粘度より求めた値を言う。Note that the intrinsic viscosity [η] is phenol/lachloroethane = 50150 (weight ratio) in a solvent at 25°C.
This is the value determined from the solution viscosity measured in .
繊維状充填材はプラスチック製邦楽器部品の曲げ弾性率
と強度を高めその音色等を改善する成分である。Fibrous filler is a component that increases the bending elastic modulus and strength of plastic Japanese musical instrument parts and improves their tone.
繊維状充填材としてはガラス繊維、ガラス繊維以外の無
機繊維、炭素繊維、耐熱性有機繊維を挙げることができ
、より具体的には繊維径１〜２０７Ｌ１１１．繊維長１
０ｍｍ以下のガラス繊維又は炭素繊維のチョツプドスト
ランド、ガラス繊維ミルドファイバー、ピッチ系炭素繊
維、繊維径０．０５ ｐ、 ｍ以１−のチタン酸カリウ
ムウィスカー、炭化ケイ素ウィスカー、芳香族ポリアミ
ド繊維、芳香族ポリイミド繊維、刀香族ポリアミドイミ
ド繊維及びこれらの組合せを挙げることが出来る。Examples of the fibrous filler include glass fibers, inorganic fibers other than glass fibers, carbon fibers, and heat-resistant organic fibers, and more specifically, fiber diameters of 1 to 207L111. Fiber length 1
Chopped strands of glass fiber or carbon fiber of 0 mm or less, milled glass fiber, pitch-based carbon fiber, potassium titanate whiskers with a fiber diameter of 0.05 p, m or more, silicon carbide whiskers, aromatic polyamide fibers, Mention may be made of aromatic polyimide fibers, aromatic polyamideimide fibers, and combinations thereof.
これらの内、ガラス繊維のチョツプドストランド、チタ
ン酸カリウムウィスカー、炭化ケイ素ウィスカーが特に
好ましく、又、炭素繊維は成形品が黒色となり独特の風
合を持つ外観となる等、特徴のある製品か得られること
から同様に好ましい。Among these, chopped strands of glass fiber, potassium titanate whiskers, and silicon carbide whiskers are particularly preferred, and carbon fiber is a product with characteristics such as a black molded product and an appearance with a unique texture. It is also preferable because it can be obtained.
繊維状充填材の含有量はポリエステル樹脂１００爪量部
に対して６０〜１？ＪＯ重量部の範囲とする。ポリエス
テル樹脂に対し６０重量部未満では邦楽器部品としての
曲げ弾性率が低く、象牙製邦楽器部品並の音響特性が悪
く、特に、周波数の高い倍音か摺られにくい。一方、１
００重量部を超えると邦楽器部品の表面状態が悪化する
ため好ましくない。The content of fibrous filler is 60 to 1 part per 100 parts of polyester resin. The range is JO parts by weight. If it is less than 60 parts by weight based on the polyester resin, the bending elastic modulus as a part of a Japanese musical instrument is low, and the acoustic properties are as bad as those of parts of a Japanese musical instrument made of ivory, and in particular, high-frequency overtones are difficult to rub. On the other hand, 1
If it exceeds 0.00 parts by weight, the surface condition of Japanese musical instrument parts will deteriorate, which is not preferable.
フッ素樹脂粉末はプラスチック製邦楽器部品の感触を良
くし、且つ、繊維強化樹脂の硬度を低下させると共に象
牙様の潤滑性を付与せしめるための本発明に不可欠な成
分である。Fluororesin powder is an essential component of the present invention for improving the feel of plastic parts of Japanese musical instruments, reducing the hardness of the fiber-reinforced resin, and imparting ivory-like lubricity.
フッ素樹脂粉末としてはポリテ］・ラフルオロエチレン
、ポリクロロトリフルオロエチレン、テトラフルオロエ
チレン−へキサフルオロプロピレンＪセ重合体、ポリフ
ッ化ビニル、ポリフッ化ビニリデン、クロロトリフルオ
ロエチレン−フッ化ビニリデン共重合体が挙げられ、特
に好ましくはポリテトラフルオロエチレンが用いられる
。Examples of fluororesin powders include polytetrafluoroethylene, polychlorotrifluoroethylene, tetrafluoroethylene-hexafluoropropylene J polymer, polyvinyl fluoride, polyvinylidene fluoride, and chlorotrifluoroethylene-vinylidene fluoride copolymer. Among them, polytetrafluoroethylene is particularly preferably used.
フッ素樹脂粉末の平均粒径は５０ｐ、ｍ以下とする。平
均粒径が５０ルｍを超えると成形品の外観及び特性が不
均一に成ってしまう。The average particle size of the fluororesin powder is 50 p.m or less. If the average particle size exceeds 50 lumens, the appearance and properties of the molded article will become non-uniform.
フッ素樹脂粉末の含有量はポリエステル樹脂１００重量
部に対し１０〜４０重量部とする。１０重量部未満では
優れた象牙様感触の成形品が得られ難く、又、４０重量
部より多いと微妙な成形精度を要求する邦楽器部品とし
ての賦形性や射出成形性が茗しく悪くなるため好ましく
ない。The content of the fluororesin powder is 10 to 40 parts by weight per 100 parts by weight of the polyester resin. If it is less than 10 parts by weight, it is difficult to obtain a molded product with an excellent ivory-like feel, and if it is more than 40 parts by weight, the formability and injection moldability of Japanese musical instrument parts, which require delicate molding precision, will be poor. Therefore, it is undesirable.
結晶化促進剤はポリエステル系樹脂の結晶性を高め、プ
ラスチック製邦楽器部品の外観及び感触を改善するだめ
の成分である。The crystallization accelerator is a component that increases the crystallinity of the polyester resin and improves the appearance and feel of plastic Japanese musical instrument parts.
結晶化促進剤としてはポリエステル系樹脂の結晶核剤と
して効果を有する有機カルボン酸の周期律表第１ａ族又
は第１Ｉ ａ族の金属塩、安息香酸エステル又は安息香
酸誘導体のエステル、脂肪酪エステル、イオン性共重合
体の金属塩、結晶化促進剤として効果のある無機粉体等
が挙げられ、具体的にはラウリン酸ナトリウム、ラウリ
ン酸カリウム、ミリスチン酸ナトリウム、ミリスチン酸
カリウム、ミリスチン酸カルシウム、ステアリン酸すト
リウム、ステアリン酸カリウム、ステアリン酩カルシウ
ム、オクタコサン酸ナトリウム、オクタコサン酸カルシ
ウム、安息香酸ナトリウム、安息香酸カリウム、安息香
酸カルシウム、テレフタル酸リチウム、テレフタル酸ナ
トリウム、テレフタル酸カリウム、エチレングリコール
モノベンゾエート、エチレングリコールジベンゾエＬト
、プロピレングリコールモノベンゾエート、プロピレン
グリコールジベンゾエート、ネオペンチルグリコールモ
ノベンゾエート、ジエチレングリコールジベンゾエート
、トリエチレングリコールジベンゾエート、エチレング
リコールプロピレングリコールジベンゾエート、エチレ
ン−アクリル猷ナトリウム共重合体、エチレン−メタク
リル酸すトリウム共重合体、タルク、酸化チタン、酸化
亜鉛等及びこれらの組合せを用いることが出来る。Examples of crystallization promoters include metal salts of Group 1a or Group 1Ia of the periodic table of organic carboxylic acids that are effective as crystal nucleating agents for polyester resins, benzoic acid esters or esters of benzoic acid derivatives, fatty butyric esters, Examples include metal salts of ionic copolymers, inorganic powders effective as crystallization promoters, and specific examples include sodium laurate, potassium laurate, sodium myristate, potassium myristate, calcium myristate, and stearin. Thorium acid, potassium stearate, calcium stearate, sodium octacosanoate, calcium octacosanoate, sodium benzoate, potassium benzoate, calcium benzoate, lithium terephthalate, sodium terephthalate, potassium terephthalate, ethylene glycol monobenzoate, ethylene Glycol dibenzoate, propylene glycol monobenzoate, propylene glycol dibenzoate, neopentyl glycol monobenzoate, diethylene glycol dibenzoate, triethylene glycol dibenzoate, ethylene glycol propylene glycol dibenzoate, ethylene-acrylic sodium copolymer, ethylene- Thorium methacrylate copolymer, talc, titanium oxide, zinc oxide, etc., and combinations thereof can be used.
これら結晶化促進剤には、更に、これらと併用させると
結晶化速度を向上せしめる化合物、例えばポリオキシエ
チレン誘導体、エポキシ化合物、ソルビタン誘導体等を
加えることも出来る。These crystallization promoters may further contain compounds that improve the crystallization rate when used in combination with them, such as polyoxyethylene derivatives, epoxy compounds, sorbitan derivatives, and the like.
結晶化促進剤の含有量はポリエステル樹脂１００重量部
に対し０．０５〜５重量部とする。５重量部を超えると
ポリエステル樹脂が劣化する傾向になり、成形が困難と
なる傾向になるため好ましくなく、又、００５重量部未
満であると結晶化度がやや低くなり、成形品は外観が劣
り、感触の悪いものとなる。The content of the crystallization accelerator is 0.05 to 5 parts by weight per 100 parts by weight of the polyester resin. If it exceeds 5 parts by weight, the polyester resin will tend to deteriorate and molding will become difficult, which is undesirable. If it is less than 0.005 parts by weight, the crystallinity will be slightly low and the molded product will have poor appearance. , it becomes unpleasant to the touch.
本発明の邦楽器部品の比重は１．１３０以りとし、好ま
しくは１．６５以上とする。組成物の比重が１．６０未
満であると象牙と同様の音色は得られず、又、象牙４．
＋ｆ有のずっしりとした重みに欠けるため好ましくない
。The specific gravity of the Japanese musical instrument parts of the present invention is 1.130 or more, preferably 1.65 or more. If the specific gravity of the composition is less than 1.60, it will not be possible to obtain a tone similar to that of ivory;
It is not preferable because it lacks the heavy weight of +f.
又、本発明のプラスチック製邦楽器部品の曲げ弾性率は
１１０，０００〜２００，０００ ｋｇ／ ｉとし、好
ましくは、１２０，０００〜１９０，０００ ｋｇ／
ｄとする。曲げ弾性率が１１０，０００ ｋｇ／ ｒ：
１未満では音響特性が劣り、高周波領域に倍音波が現れ
なくなってしまう。−力、曲げ弾性率が２００，０００
ｋｇ／ ｒ：ｄを超えると硬度が過大となり、摺動も
しくは摩擦時に相手材料を損傷せしめる。Furthermore, the bending elastic modulus of the plastic Japanese musical instrument parts of the present invention is 110,000 to 200,000 kg/i, preferably 120,000 to 190,000 kg/i.
Let it be d. Flexural modulus of 110,000 kg/r:
If it is less than 1, the acoustic characteristics will be poor and harmonic waves will not appear in the high frequency region. - force, flexural modulus of 200,000
If it exceeds kg/r:d, the hardness will be excessive and will damage the mating material during sliding or friction.
本発明のプラスチック製邦楽器部品は、例えば、ポリエ
ステル樹脂、繊維状充填材、平均粒径が５０ルｍ以下の
フ・ン素樹脂粉末及び結晶化促進剤を所定量秤量配合し
た後、これを均一に混合し、成形することによって得ら
れる。The plastic Japanese musical instrument parts of the present invention can be produced by, for example, blending a polyester resin, a fibrous filler, a fluorocarbon resin powder with an average particle size of 50 lm or less, and a crystallization accelerator in predetermined amounts. Obtained by uniformly mixing and molding.
ポリエステル樹脂、繊維状充填材、フッ素樹脂粉末及び
結晶化促進剤の混合の方法としては公知の方法、例えば
、上記秤量配合物をＶ型タンブラ−、ダブルコーン型タ
ンブラ−、ナウターミキサ−等に装荷して混合方法を用
いることが出来る。The polyester resin, fibrous filler, fluororesin powder, and crystallization accelerator can be mixed by a known method, for example, by loading the weighed mixture described above into a V-type tumbler, double cone-type tumbler, Nauta mixer, etc. Mixing methods can be used.
本発明に用いられる樹脂組成物は、通常、熱賦形されて
取扱いやすいペレット状の成形材として供される。熱賦
形には、公知の一軸又は二軸の押出機を用いることが出
来る。The resin composition used in the present invention is usually heat-shaped and provided as a pellet-shaped molding material that is easy to handle. A known single-screw or twin-screw extruder can be used for heat shaping.
押出機のシリンダー先端ヘッド圧は好ましくは２０ ｋ
ｇ／ｄ以上とし、突出口樹脂温度ｌ第３５０’Ｃ以下、
特に好ましくは２８０〜３２０’Ｃとする。このような
条件によって得られる樹脂組成物は、通常、比ｔが１．
８０以上となる。その際、必要に応じて熱や光に対する
安定剤、射出成形時の離型性改善のための離型剤、象牙
色を出すための染Φ顔料を加えることができる。象牙色
は黄色顔料、茶又は洗顔料、白顔料、黒顔料を用いて容
易に得ることができるが、用途に応じてそれらの使用量
が決定される。The cylinder tip head pressure of the extruder is preferably 20 k
g/d or more, and the ejection outlet resin temperature is 350'C or less,
Particularly preferably, the temperature is 280 to 320'C. The resin composition obtained under such conditions usually has a ratio t of 1.
It will be 80 or more. At that time, a stabilizer against heat and light, a mold release agent to improve mold releasability during injection molding, and a dye Φ pigment to produce an ivory color can be added as necessary. Ivory color can be easily obtained using yellow pigments, brown pigments, face washes, white pigments, and black pigments, but the amounts used are determined depending on the application.
次に、上記ペレット状組成物は、例えば、射出成形機に
よって本発明の邦楽器部品に成形される。その際、邦楽
器部品は肉厚部を有する成形品である場合が多いので射
出成形には特別な配慮が必要である。即ち、金型温度は
８０°Ｃ以上、ゲートは太く、射出時間は長くするのが
好ましく、射出圧力はショートショット圧力より５０ｋ
ｇ／ｃｍ以上高くし、取出した成形品は直ちに温水又は
ん水に浸漬する等の配慮が必要である。又、金型温度以
］二の温度で成形品をアニール処理すると成形品の品質
が向上する傾向がある。Next, the pelletized composition is molded into the Japanese musical instrument component of the present invention using, for example, an injection molding machine. In this case, since Japanese musical instrument parts are often molded products with thick parts, special consideration is required for injection molding. In other words, it is preferable that the mold temperature is 80°C or higher, the gate is wide, the injection time is long, and the injection pressure is 50k higher than the short shot pressure.
g/cm or higher, and care must be taken such as immediately immersing the molded product in warm water or brine after taking it out. Furthermore, when a molded product is annealed at a temperature lower than the mold temperature, the quality of the molded product tends to improve.
本発明のプラスチック製邦楽器部品は、引張強度・弾性
率の高い繊維状充填材によって繊維強化されているので
機械的特性に優れ、耐摩耗性が高く、演奏用具としては
高周波領域に倍音波を現わす等の音響特性を有し、間柱
、駒等の音伝導体部品としては弦振動を減衰することな
く共鳴体に伝える。又、フッ素樹脂粉末を含有するので
象牙様の外観、感触を呈し、且つ、耐摩耗性を更に改善
する効果を有する。又、結晶性の高いポリエステル樹脂
を基材とするため、マトリクスの機械的特性、耐摩耗性
及び耐熱性が優れ、しかも、艶、光沢等の外観が象牙と
類似している。更には、熱可帝性樹脂であるので成形に
は従来の射出成形、押出成形の方法を適用することが出
来、その結果、本発明のプラスチック製邦楽器部品は量
産性に優れ、且つ、その成形品は廉価である。The plastic Japanese musical instrument parts of the present invention are fiber-reinforced with a fibrous filler that has high tensile strength and elastic modulus, so they have excellent mechanical properties and high abrasion resistance. The string vibrations are transmitted to the resonator without attenuation as sound conductor parts such as studs and bridges. Furthermore, since it contains fluororesin powder, it has an ivory-like appearance and feel, and has the effect of further improving wear resistance. In addition, since the base material is a polyester resin with high crystallinity, the matrix has excellent mechanical properties, wear resistance, and heat resistance, and has an appearance similar to that of ivory in terms of luster and luster. Furthermore, since it is a thermoplastic resin, conventional injection molding and extrusion molding methods can be applied to the molding process, and as a result, the plastic Japanese musical instrument parts of the present invention are excellent in mass production and are easy to use. Molded products are inexpensive.
以下、本発明を実施例に添って詳説する。Hereinafter, the present invention will be explained in detail with reference to Examples.
−−１〜 ３ び ｌ 〜 ４固有粘度［
η］が０．７５のボエチレンテレフタレート、繊維経１
０ルｍ、繊維長３ｍｍのガラス繊維チョプドストランド
、平均粒径３ｇｍのポリテトダブルオロエチレン粉末及
び安息香酸ナトリウムを次表に示す７種類の量比に配合
した後、これらをダブルコーン型タンブラ−に入れ５分
間混合し、次に、これら配合物をシリンダ一温度２８０
°Ｃ１圧力３０−７０ｋｇ／ ｃｍ、スクリュー回転数
！ａｏｒｐｍで、６５ｆｆ１ｍφ、Ｌ／Ｄ ＝３６のス
クリューをもつベント−軸押出機によって押出し、押出
ストランドを切断してペレット状に賦形した。得られた
ペレットの比重はいずれも１．８０以上であった。これ
らのペレットの比重を次表に示す。--1 ~ 3 bi l ~ 4 Intrinsic viscosity [
Boethylene terephthalate with η] of 0.75, fiber diameter 1
After blending glass fiber chopped strands with a fiber length of 3 mm, polytetrodouble ethylene powder with an average particle size of 3 gm, and sodium benzoate in the seven ratios shown in the table below, they were mixed into a double cone tumbler. - mix for 5 minutes, then add these formulations to the cylinder at a temperature of 280°C.
°C1 pressure 30-70kg/cm, screw rotation speed! It was extruded at aorpm using a vent-screw extruder with a screw of 65 ff 1 mφ and L/D = 36, and the extruded strands were cut and shaped into pellets. The specific gravity of the obtained pellets was all 1.80 or more. The specific gravity of these pellets is shown in the table below.
次に、これらペレットを日本製鋼製射出成形機Ｎ−１４
０ＢＩＴに装荷して、ＩＯＸ １０ｍｍのゲート寸法を
持つ三味線撥の１個取り金型を用い、シリンダ一温度２
７０°Ｃ１成形サイクル１５０秒、射出時間４５秒、冷
却時間９０秒、射出圧力３００ ｋｇ／ ＋ｉ、金型温
度１４０℃で重量１３５ ｇの三味線撥を成形した。又
、別の金型を用いたこと以外は」二と同一の射出成形条
件で、上記７種類のペレットから、ＡＳＴＭ ０７８９
０ツクウ工ル試験片及びＡＳＴＭ Ｄ ７９０曲げ試験
片を成形した。Next, these pellets were processed using a Nippon Steel injection molding machine N-14.
Loaded at 0 BIT, using a single-cavity mold of Shamisen Hachi with a gate dimension of IOX 10 mm, the cylinder temperature was 2.
A shamisen bachi weighing 135 g was molded at 70°C, a molding cycle of 150 seconds, an injection time of 45 seconds, a cooling time of 90 seconds, an injection pressure of 300 kg/+i, and a mold temperature of 140°C. In addition, ASTM 0789 was obtained from the above seven types of pellets under the same injection molding conditions as in the second except that a different mold was used.
0x100m test specimens and ASTM D 790 bend test specimens were molded.
更に、基準試料として、上質象牙撥を用意すると共に、
象牙を切出加工することによってＡＳＴＭ Ｄ７８８０
ツクウェル試験片及びＡＳＴＭ Ｄ ７９０曲げ試験片
を得た。 次に、−に記の方法によって得られた三味線
撥に関して、その外観、感触、音色及び三味線の弦の損
傷の程度の試験を行った。音色の試験は三味線を演奏し
、調子４本の■の糸開放弦を繰返し弾いて判定した。Furthermore, as well as preparing a high-quality ivory repellent as a reference sample,
ASTM D7880 by cutting ivory
Tsukwell specimens and ASTM D 790 bend specimens were obtained. Next, the shamisen plectrum obtained by the method described in (-) was tested for its appearance, feel, tone, and degree of damage to the shamisen strings. Tones were tested by playing a shamisen and repeatedly playing the open strings of the four ``■'' strings.
三味線撥の外観、感触、音色及び三味線の弦の損傷の程
度の評価は上質象牙製品を基準にとって比較し、これら
の特性を次の０、Δ及び×の三の区分に分類することに
よって行った。The appearance, feel, tone, and degree of damage to the shamisen strings were evaluated using high-quality ivory products as standards, and these characteristics were classified into the following three categories: 0, Δ, and ×. .
れる。It will be done.
又、ＡＳＴＭ Ｄ ７８９０ツクウ工ル試験片を用いて
ロックエル硬度試験を、ＡＳＴＭ Ｄ ７９０曲げ試験
片を用いて曲げ弾性率測定試験を行って成形品の機械的
特性を求めた。In addition, the mechanical properties of the molded product were determined by performing a Rockwell hardness test using an ASTM D 7890 test piece and a flexural modulus measurement test using an ASTM D 790 bending test piece.
これらの結果をまとめて次表に示す。These results are summarized in the table below.
又、以上の試験とは別に上記実施例１の本発明に係る三
味線の撥と象牙撥、本復、汎用プラスチック撥と音響効
果を比較するため、それぞれの音響波形及び音響スペク
トルの分析を行なった。In addition to the above tests, in order to compare the acoustic effects of the shamisen plectrum according to the present invention in Example 1 with the ivory plectrum, honboku plectrum, and general-purpose plastic plectrum, the acoustic waveforms and acoustic spectra of each were analyzed. .
音響波形及び音響スペクトラムは無響室（温度１２°Ｃ
，湿度６５％）の中央位置で三味線を弾き、マイクロホ
ンを三味線の胴から１．２ｍ離して設置し、株式会社小
野測器製作所製ＦＦＴアナライザーＣＦ−５００型によ
って測定した。Acoustic waveforms and acoustic spectra were recorded in an anechoic chamber (temperature 12°C).
The shamisen was played at the center of the room (with humidity of 65%), the microphone was placed 1.2 m away from the body of the shamisen, and the measurements were taken using an FFT analyzer model CF-500 manufactured by Ono Sokki Seisakusho Co., Ltd.
これらの測定結果を第１図及び第２図に示す。The results of these measurements are shown in FIGS. 1 and 2.
第１図は、象牙反撥、実施例１で得られた本発明のプラ
スチック反撥及びカシ製氷板をそれぞれ調子４木の■の
糸開放弦で三味線を弾いたときの波形の立」二かり約８
００ｍ５ｅｃ後の３１．２５ｍ５ｅｃ間における音響波
形である。Figure 1 shows the waveforms of the ivory repulsion, the plastic repulsion of the present invention obtained in Example 1, and the oak ice-making plate when played on a shamisen with an open string of tune 4, respectively.
This is an acoustic waveform during 31.25 m5 ec after 00 m5 ec.
図中、曲線■、■及び■はそれぞれ象牙反撥、実施例１
で得られた本発明に係る撥及びカシ製氷板についての波
形を表す。In the figure, curves ■, ■, and ■ are respectively ivory repulsion, Example 1
3 shows the waveforms of the Hachi and Kashi ice-making plates according to the present invention obtained in FIG.
尚、図の横軸は時間を、縦軸は音圧の大きさを表し、■
、■及び＠について、縦軸の５つの目盛は同一の大きさ
を有する。In addition, the horizontal axis of the figure represents time, the vertical axis represents the magnitude of sound pressure, and ■
, ■, and @, the five scales on the vertical axis have the same size.
図から明らかな通り、本発明に係る撥の音響波形は象牙
撥のものと酷似している。特に、点線円の部分は本発明
に係る撥と象牙撥に共通する特徴的な高周波数領域の倍
音波形部分である。この倍音波形はカシ製氷板の音響波
形には現れない。As is clear from the figure, the acoustic waveform of the plectrum according to the present invention is very similar to that of the ivory plectrum. In particular, the dotted circle portion is a harmonic waveform portion in a characteristic high frequency range that is common to the plectrum according to the present invention and the ivory plectrum. This harmonic waveform does not appear in the acoustic waveform of the oak ice plate.
又、第２図は象牙反撥、実施例１の本発明に係る撥、Ａ
ＢＳ樹脂樹脂反撥カン製氷板をそれぞれ調子４本のｍの
開放弦で三味線を弾いたときの音響スペクトラムである
。In addition, FIG. 2 shows ivory repellent, repellent according to the present invention of Example 1, A
This is the acoustic spectrum when a shamisen is played using the BS resin repellent can ice plate with four m open strings.
第２図において、曲線■、■、■及び■はそれぞれ象牙
反撥、本発明に係る撥、ＡＢＳ樹脂樹脂反撥カシ製氷板
の音響スペクトラムを表す。In FIG. 2, the curves ■, ■, ■, and ■ represent the acoustic spectra of the ivory repellent, the repellent according to the present invention, and the ABS resin repellent oak ice plate, respectively.
第２図から明らかな通り、本発明に係る撥の音響スペク
トラムはＡＢＳ製及びカシ酸の撥の音響スペクトラムに
比較し、象牙製の音響スペクトラムに最もどく、象牙撥
と同様に周波数の高い倍音が明確に現れている。As is clear from Fig. 2, the acoustic spectrum of the repellent according to the present invention is the highest in the acoustic spectrum of the ivory repellent, compared to the acoustic spectrum of the ABS repellent and the oak repellent, and like the ivory repellent, there are high-frequency overtones. clearly visible.
実施例
実施例１で得られたペレットを住友重機製ネオマｙ ト
Ｎ ７５／ １５０射出成形機で間柱成形用金型を用い
、シリンダ一温度２７５°Ｃ１成形サイクル１０秒、金
型温度１４０°Ｃで重量２０ｇの間柱を成形した。得ら
れた間柱を琴に取付けて演奏を行ったところ弦の切れは
無く、音色も象牙製昇柱と同様であった。EXAMPLE The pellets obtained in Example 1 were molded using a neomyto N 75/150 injection molding machine manufactured by Sumitomo Heavy Industries, Ltd. using a stud molding die, a cylinder temperature of 275°C, a molding cycle of 10 seconds, and a mold temperature of 140°C. A stud with a weight of 20 g was molded. When the obtained stud was attached to a koto and played, the strings did not break and the tone was the same as that of the ivory koto.
第１図は、本発明に係るプラスチ・ンク反撥、象牙反撥
及びカシ製氷板をそれぞれ調子４本の工の糸開放弦で三
味線を弾いたときの音響波形である。
第２図は本発明に係るプラスチ・ンク反撥、象牙反撥、
ＡＢＳ樹脂樹脂反撥カシ製氷板をそれぞれ調子４木の■
の開放弦で三味線を弾しλだときの音響スペクトラムで
ある。
−５′１
東京都渋谷区渋谷２丁目１９番１５FIG. 1 shows the acoustic waveforms when a shamisen is played using the plastinum repulsion, ivory repulsion, and oak ice-making plate according to the present invention, respectively, with four open strings. FIG. 2 shows plastic repellent, ivory repellent, and ivory repellent according to the present invention.
ABS resin repellent oak ice plate each made of 4 pieces of wood.
This is the acoustic spectrum when playing the shamisen with the open string at λ. -5'1 2-19-15 Shibuya, Shibuya-ku, Tokyo
Claims (1)
〜１００重量部、平均粒径が５０ｇｍ以下のフッ素樹脂
粉末１０〜４０重量部、結晶化促進剤０．０５〜５重量
部から配合されてなり、且つ、比重が１６０以上、曲げ
弾性率が１１０，０００〜２００，０００ｋｇ／ ｒａ
ｔ（であるプラスチック製邦楽器部品。 ２、該プラスチック製邦楽器部品が三味線の撥である特
許請求の範囲第１項記載のプラスチック製邦楽器部品。 ３、該プラスチック製邦楽器部品が三味線の駒である特
許請求の範囲第１項記載のプラスチック製邦楽器部品。 ４、該プラスチック製邦楽器部が三味線の糸巻である特
許請求の範囲第１項記載のプラスチ・ンク製邦楽器部品
。 ５、該プラスチック製邦楽器部品が間柱である特許請求
の範囲第１項記載のプラスチック製邦楽器部品。 ６、該プラスチック製邦楽器部品が琴爪である特許請求
の範囲第１項記載のプラスチック製邦楽器部品。[Claims] ■, 100 parts by weight of polyester resin, 60 parts by weight of fibrous filler
~100 parts by weight, 10 to 40 parts by weight of fluororesin powder with an average particle size of 50 gm or less, and 0.05 to 5 parts by weight of a crystallization promoter, and has a specific gravity of 160 or more and a flexural modulus of 110. ,000~200,000kg/ra
2. The plastic Japanese musical instrument part according to claim 1, wherein the plastic Japanese musical instrument part is a shamisen pick. 3. The plastic Japanese musical instrument part is a shamisen pick. 4. The plastic Japanese musical instrument part according to claim 1, which is a piece. 4. The plastic Japanese musical instrument component according to claim 1, wherein the plastic Japanese musical instrument part is a shamisen pincushion. 5. , the plastic Japanese musical instrument component according to claim 1, wherein the plastic Japanese musical instrument component is a stud. 6. The plastic Japanese musical instrument component according to claim 1, wherein the plastic Japanese musical instrument component is a kotozume. Vessel parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58069898A JPS59195689A (en) | 1983-04-22 | 1983-04-22 | Parts of plastic japanese style musical instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58069898A JPS59195689A (en) | 1983-04-22 | 1983-04-22 | Parts of plastic japanese style musical instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59195689A true JPS59195689A (en) | 1984-11-06 |
| JPS6343756B2 JPS6343756B2 (en) | 1988-09-01 |
Family
ID=13415975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58069898A Granted JPS59195689A (en) | 1983-04-22 | 1983-04-22 | Parts of plastic japanese style musical instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59195689A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04142596A (en) * | 1990-10-01 | 1992-05-15 | A Danwoody David | Bridge and guitar bridge saddle for stringed instrument and method of making guitar chord hard to breake |
| JPH0679745A (en) * | 1990-01-17 | 1994-03-22 | L'oreal Sa | Method for obtaining moldings having appearance of natural stone and obtained moldings |
| JP2012047947A (en) * | 2010-08-26 | 2012-03-08 | Yamaha Corp | Acoustic sheet and method of producing acoustic sheet |
-
1983
- 1983-04-22 JP JP58069898A patent/JPS59195689A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679745A (en) * | 1990-01-17 | 1994-03-22 | L'oreal Sa | Method for obtaining moldings having appearance of natural stone and obtained moldings |
| JPH04142596A (en) * | 1990-10-01 | 1992-05-15 | A Danwoody David | Bridge and guitar bridge saddle for stringed instrument and method of making guitar chord hard to breake |
| JP2012047947A (en) * | 2010-08-26 | 2012-03-08 | Yamaha Corp | Acoustic sheet and method of producing acoustic sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6343756B2 (en) | 1988-09-01 |
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