JPS6114564B2 - - Google Patents
Info
- Publication number
- JPS6114564B2 JPS6114564B2 JP16122778A JP16122778A JPS6114564B2 JP S6114564 B2 JPS6114564 B2 JP S6114564B2 JP 16122778 A JP16122778 A JP 16122778A JP 16122778 A JP16122778 A JP 16122778A JP S6114564 B2 JPS6114564 B2 JP S6114564B2
- Authority
- JP
- Japan
- Prior art keywords
- graphite powder
- head shell
- flat plate
- resin
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 25
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000004898 kneading Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000010000 carbonizing Methods 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Description
【発明の詳細な説明】
この発明はレコード再生用ヘツドシエルの製造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a head shell for playing records.
近年カートリツジのトレース能力を高めるた
め、振動系の質量を小さくし、かつコンプライア
ンスを大きくする傾向がある。 In recent years, in order to improve the tracing ability of cartridges, there has been a trend to reduce the mass of the vibration system and increase compliance.
ところがカートリツジのコンプライアンスを大
きくすると、カートリツジのコンプライアンスと
カートリツジを含むトーンアーンの針先等価質量
により生ずる低域共振周波数が低くなつて、レコ
ード盤の偏心やそり等による雑音をピツクアツプ
するようになり、Ｓ／Ｎが悪化してしまう。そこ
で針先等価質量の小さく、低域共振を適当な値
（一般に10〜15Hzが良いとされている）にする必
要がある。 However, when the compliance of the cartridge is increased, the low-frequency resonance frequency generated by the compliance of the cartridge and the equivalent mass of the tip of the tone earner including the cartridge becomes lower, and noises caused by eccentricity and warping of the record are picked up. /N gets worse. Therefore, the equivalent mass of the needle tip must be small and the low-frequency resonance must be set to an appropriate value (10 to 15 Hz is generally considered good).
ところで針先等価質量を小さくするには、アー
ムパイプやヘツドシエルを軽くすれば良いが、軽
くするために肉厚を薄くすると剛性が低下してし
てまい、不要な分割共振等が生じやすくなり、音
質を劣化させることが多い。そこで剛性が高く、
しかも軽量なアームパイプやヘツドシエルを製作
するためには、比弾性率の高い材料が必要とな
る。 By the way, in order to reduce the equivalent mass of the needle tip, it is possible to make the arm pipe and head shell lighter, but if the wall thickness is made thinner in order to make it lighter, the rigidity will decrease and unnecessary split resonance etc. will easily occur. This often degrades the sound quality. Therefore, the rigidity is high,
Moreover, in order to manufacture lightweight arm pipes and head shells, materials with high specific elastic modulus are required.
ところが従来使用されている材料であるアルミ
ニウムやチタンは、比弾性率が比較的大きい方で
あるが、しかしコンプライアンスの大きなカート
リツジと組合せて使うアームパイプやヘツドシエ
ルを製作するには、さらに比弾性率の大きな材料
が必要となる。 However, conventionally used materials such as aluminum and titanium have relatively high specific moduli, but in order to manufacture arm pipes and head shells that are used in combination with cartridges with high compliance, it is necessary to have even higher specific modulus. Requires large materials.
またカーボンフアイバーを材料としたアームパ
イプやヘツドシエルが存在するが、このカーボン
フアイバーは比弾性率が大きいが、しかしアーム
パイプやヘツドシエルに成形するために樹脂との
複合化が必要となる。ところが樹脂と複合させる
と総合的な比弾性率は小さくなつてしまい、上記
したアルミニウムやチタンと同等かあるいはそれ
以下となり、アームパイプやヘツドシエルとして
の材料には不向きであつた。 In addition, there are arm pipes and head shells made of carbon fiber, but this carbon fiber has a high specific modulus of elasticity, but in order to be molded into arm pipes and head shells, it is necessary to combine it with resin. However, when composited with resin, the overall specific elastic modulus becomes small, equal to or lower than the above-mentioned aluminum and titanium, making it unsuitable as a material for arm pipes and head shells.
この発明は叙上の点に鑑みて成されたもので、
アームパイプとヘツドシエルのうちヘツドシエル
を樹脂と黒鉛粉を混練し、黒鉛粉を配向させるこ
とによつて得られる比弾性率の高い材料で形成
し、軽量で剛性の高い、高性能なヘツドシエルを
製造し得るヘツドシエルの製造方法を提供するこ
とを目的とする。 This invention was made in view of the above points,
Of the arm pipe and head shell, the head shell is made of a material with a high specific elastic modulus obtained by kneading resin and graphite powder and orienting the graphite powder, producing a lightweight, high-rigidity, high-performance head shell. The object of the present invention is to provide a method for producing a head shell obtained by the present invention.
またこの発明は、樹脂と黒鉛粉を混練した材料
を圧延し平板状にして黒鉛粉を配向させた後にプ
レス加工等によりヘツドシエルの形状にして製造
するヘツドシエルの製造方法を提供することを目
的とする。 Another object of the present invention is to provide a method for producing a head shell, which involves rolling a material obtained by kneading resin and graphite powder into a flat plate, orienting the graphite powder, and then shaping the material into a head shell by pressing or the like. .
次にこの発明に使用する材料について説明する
に、例えば、樹脂に塩化ビニール（以下PVCと
いう）を用い、該PVC30部と黒鉛粉70部を130℃
〜200℃の温度下でロールにてよく混合した後、
圧延して得られる平板は、ヤング率が6000Kg/
mm2、密度が1.8ｇ/cm3となる。従つて比弾性率は
3.3×109mmとなり、アルミニウム、チタンの比弾
性率2.6×109mmに比べ約1.3倍の大きさとなる。 Next, to explain the materials used in this invention, for example, vinyl chloride (hereinafter referred to as PVC) is used as the resin, and 30 parts of PVC and 70 parts of graphite powder are heated at 130°C.
After mixing well on a roll at a temperature of ~200℃,
The flat plate obtained by rolling has a Young's modulus of 6000Kg/
mm 2 , and the density is 1.8 g/cm 3 . Therefore, the specific elastic modulus is
The specific elastic modulus of aluminum and titanium is 3.3×10 9 mm, which is approximately 1.3 times larger than that of aluminum and titanium, which have a specific elastic modulus of 2.6×10 9 mm.
さらにこの材料を酸化雰囲気中で250℃まで１
〜10℃/Hの割合で徐々に昇温させながら加熱し
予備焼成した後、非酸化性雰囲気中または真空中
で1200℃まで10〜20℃の昇温率で加熱して炭化す
ると、ヤング率が25000Kg/mm2、密度が1.7ｇ/cm3と
なる。従つて比弾性率は1.5×1010mmとなり、ア
ルミニウム、チタンのそれと比べ約5.5倍に達す
る。 Furthermore, this material was heated to 250℃ in an oxidizing atmosphere.
After pre-calcining by heating while gradually increasing the temperature at a rate of ~10℃/H, carbonizing by heating at a rate of 10 to 20℃ in a non-oxidizing atmosphere or in vacuum to 1200℃ increases the Young's modulus. is 25000Kg/mm 2 and the density is 1.7g/cm 3 . Therefore, the specific elastic modulus is 1.5×10 10 mm, which is about 5.5 times that of aluminum and titanium.
ただし上記した材料は黒鉛粉が配向しているこ
とが必要であつて、単にPVCと黒鉛粉を混練し
押出し成形などで成形したのではヤング率は高く
ならない。例えば、上記したPVC30部と黒鉛粉
70部の割合で混合し練合せた材料を押出し成形機
で平板に押し出した材料は、そのヤング率を測定
すると、約1300Kg/mm2となり、黒鉛粉を配向させ
た場合に比べ、1/4.5に低下する。また上記の材
料を炭化したものは、ヤング率が4000Kg/mm2とな
り、黒鉛粉を配向させた場合の約1/6のヤング率
しか得られない。 However, the above-mentioned materials require graphite powder to be oriented, and simply kneading PVC and graphite powder and molding by extrusion or the like will not increase the Young's modulus. For example, 30 parts of PVC mentioned above and graphite powder
When the Young's modulus of a material that is mixed and kneaded at a ratio of 70 parts and extruded into a flat plate using an extrusion molding machine is approximately 1300 Kg/ mm2 , which is 1/4.5 of that of oriented graphite powder. decreases to Further, the carbonized material has a Young's modulus of 4000 Kg/mm 2 , which is only about 1/6 of that obtained by oriented graphite powder.
以上説明したように、樹脂と黒鉛粉を混練した
材料（以下本材料という）は、他の材料に比べ比
弾性率が大きく、軽量で剛性の高いヘツドシエル
を作る材料として優れている。さらに本材料の内
部損失は、tanδ＝0.05であり、アルミニウムの
tanδ＝0.003、チタンのtanδ＝0.005に比べ、約
10倍も大きく、従つて不要な共振が生じ難く、理
想的なヘツドシエルの材料と言える。 As explained above, the material made by kneading resin and graphite powder (hereinafter referred to as the present material) has a higher specific elastic modulus than other materials, and is excellent as a material for making lightweight and highly rigid head shells. Furthermore, the internal loss of this material is tanδ=0.05, which is equal to that of aluminum.
tanδ=0.003, compared to titanium tanδ=0.005, approx.
It is 10 times larger and therefore less likely to cause unnecessary resonance, making it an ideal headshell material.
以下この発明に係るヘツドシエルの製造方法に
ついて説明する。 The method for manufacturing a headshell according to the present invention will be explained below.
第１図ａは樹脂と黒鉛粉を混練した材料（以下
混練物という）を示し、図中１は樹脂部、２は樹
脂中の黒鉛粉にして、これは鱗片状をしており、
マクロ的に見ると厚みに対し直径の大きな円盤と
みることができる。樹脂と黒鉛粉と混練しただけ
の状態では図示のように黒鉛粉２の向きはランダ
ムである。そこで上記混練物をローラやプレス等
で圧延し平板にすると、第１図ｂのように平板３
の中の黒鉛粉のみは該平板３の面に並行して配向
される。 Figure 1a shows a material made by kneading resin and graphite powder (hereinafter referred to as the kneaded material), in the figure 1 is the resin part, 2 is the graphite powder in the resin, which has a scale shape.
From a macroscopic perspective, it can be seen as a disk with a large diameter relative to its thickness. When the resin and graphite powder are simply kneaded together, the orientation of the graphite powder 2 is random as shown in the figure. Therefore, when the above-mentioned kneaded material is rolled into a flat plate using a roller or a press, a flat plate 3 is formed as shown in Fig. 1b.
Only the graphite powder inside is oriented parallel to the surface of the flat plate 3.
そして平板３は所定のヘツドシエルの板厚に合
せて厚さを決定する。この平板３をプレスして第
３図のようなヘツドシエル５を成形する。プレス
する場合は、型を適当な温度に加熱して行う。第
４，５図は第３図の−線および−線断面
図である。黒鉛粉２は第４，５図からわかるよう
に、ヘツドシエル４の表面に並行して配向されて
いる。 The thickness of the flat plate 3 is determined in accordance with the thickness of a predetermined head shell. This flat plate 3 is pressed to form a head shell 5 as shown in FIG. When pressing, heat the mold to an appropriate temperature. 4 and 5 are sectional views taken along the - line and - line in FIG. 3. As can be seen from FIGS. 4 and 5, the graphite powder 2 is oriented parallel to the surface of the head shell 4.
使用する黒鉛粉２は、平均粒径20μ以下のもの
が良く、特に５μ以下のものが適している。また
黒鉛粉２と混合する樹脂部１としては、塩化ビニ
ール、塩化ビニリデン、塩化ビニールとアクリル
ニトリルの共重合体、塩化ビニリデンとアクリル
ニトリルの共重合体、塩化ビニールと酢酸ビニー
ルとの共重合体等の単体またはこれらの樹脂の組
合せが適している。 The graphite powder 2 used preferably has an average particle size of 20 μm or less, particularly 5 μm or less. Further, as the resin part 1 to be mixed with the graphite powder 2, vinyl chloride, vinylidene chloride, a copolymer of vinyl chloride and acrylonitrile, a copolymer of vinylidene chloride and acrylonitrile, a copolymer of vinyl chloride and vinyl acetate, etc. A single substance or a combination of these resins are suitable.
上記したヘツドシエル４に成形した後、酸化性
雰囲気中で250℃まで、１℃〜10℃/Hの割合で
徐々に昇温しながら加熱して予備焼成して不融化
し、その後非酸化性雰囲気または真空中で1200℃
まで、10℃〜20℃の昇温率で加熱し炭化すると、
ヘツドシエル４の剛性は炭化前に比べて約４倍に
も向上する。 After molding into the above-mentioned head shell 4, it is heated to 250°C in an oxidizing atmosphere while gradually increasing the temperature at a rate of 1°C to 10°C/H to pre-fire it to make it infusible, and then in a non-oxidizing atmosphere. or 1200℃ in vacuum
When heated at a temperature increase rate of 10℃ to 20℃ until carbonization,
The rigidity of the head shell 4 is improved by about 4 times compared to before carbonization.
なお上記した予備焼成ではヘツドシエル４が変
形する可能性があるので、ヘツドシエル４の内側
に変形防止の型（250℃以上の温度でも変形しな
い材料製）を入れるか、ヘツドシエル４の外側を
型で押える必要がある。また予備焼成後にあつて
は、1200℃まで加熱し炭化しても変形は生じない
ので型を押える必要はない。 Note that the head shell 4 may be deformed during the pre-firing described above, so either insert a mold to prevent deformation (made of a material that does not deform even at temperatures above 250°C) inside the head shell 4, or press the outside of the head shell 4 with a mold. There is a need. Furthermore, after pre-firing, there is no need to press the mold because no deformation occurs even when heated to 1200°C and carbonized.
炭化温度をさらに高くし、2500℃以上で黒鉛化
すると、ヘツドシエル４の剛性は、1200℃にて炭
化したものと比べ、約1.5倍も大きくなる。 If the carbonization temperature is further increased to graphitize at 2500°C or higher, the rigidity of Headshell 4 will be approximately 1.5 times greater than that of one carbonized at 1200°C.
なお第２図中、５はアームパイプ、６はバラン
スウエイト、７８はアーム軸である。 In FIG. 2, 5 is an arm pipe, 6 is a balance weight, and 78 is an arm shaft.
この発明は上記したように、黒鉛粉を配向した
ことにより軽量で剛性の高いヘツドシエルが得ら
れ、従つて針先等価質量の小さなヘツドシエルを
製作できると共にコンプライアンスの大きなカー
トリツジと組合せてもレコードのそりや偏心によ
る雑音をピツクアツプし難くなり、Ｓ／Ｎの良い
再生ができる。また内部損失も大きいので、不要
な共振や分割振動が起り難く、音質の良い再生が
可能であり、さらに成形が簡単で材料費が安く製
品のコストを安くできる等の効果を有するもので
ある。 As described above, this invention allows a lightweight and highly rigid head shell to be obtained by orienting graphite powder, making it possible to manufacture a head shell with a small needle tip equivalent mass, and also to prevent warping of records even when combined with a cartridge with high compliance. It becomes difficult to pick up noise caused by eccentricity, and reproduction with good S/N can be achieved. In addition, since the internal loss is large, unnecessary resonance and split vibration are unlikely to occur, and high-quality sound reproduction is possible.Furthermore, it is easy to mold, and the material cost is low, resulting in lower product costs.
第１図はこの発明に係るヘツドシエルの製造方
法における製造過程を示す説明図、第２図はトー
ンアーム全体の側面図、第３図はこの発明の製造
方法によつて製造されたヘツドシエルの斜視図、
第４，５図は同上の−線および−線断面
図である。
１……樹脂部、２……黒鉛粉、４……ヘツドシ
エル。
FIG. 1 is an explanatory view showing the manufacturing process in the method for manufacturing a head shell according to the present invention, FIG. 2 is a side view of the entire tone arm, and FIG. 3 is a perspective view of the head shell manufactured by the method for manufacturing the head shell according to the present invention. ,
4 and 5 are cross-sectional views taken along the - line and - line of the same. 1... Resin part, 2... Graphite powder, 4... Head shell.
Claims (1)
て黒鉛粉を配向させた後にプレス加工等により所
定の形状に成形したことを特徴とするヘツドシエ
ルの製造方法。 ２ 樹脂と黒鉛粉を混練した材料を平板に圧延し
て黒鉛粉を配向させた後にプレス加工等により所
定の形状に成形し、これを炭化または黒鉛化する
ことを特徴とするヘツドシエルの製造方法。[Scope of Claims] 1. A method for manufacturing a head shell, which comprises rolling a material obtained by kneading resin and graphite powder into a flat plate, orienting the graphite powder, and then molding the material into a predetermined shape by pressing or the like. 2. A method for producing a headshell, which comprises rolling a material obtained by kneading resin and graphite powder into a flat plate, orienting the graphite powder, and then forming the material into a predetermined shape by press processing or the like, and carbonizing or graphitizing the material.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16122778A JPS5589903A (en) | 1978-12-28 | 1978-12-28 | Head shell and its manufacture |
| US06/063,532 US4269416A (en) | 1978-08-04 | 1979-08-03 | Head shell for record player tonearms |
| GB7927324A GB2037053B (en) | 1978-08-04 | 1979-08-06 | Head shell for record player tonearms |
| DE19792933434 DE2933434C2 (en) | 1978-08-18 | 1979-08-17 | Audio head housings for tonearms of record players and processes for the production of the audio head housings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16122778A JPS5589903A (en) | 1978-12-28 | 1978-12-28 | Head shell and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5589903A JPS5589903A (en) | 1980-07-08 |
| JPS6114564B2 true JPS6114564B2 (en) | 1986-04-19 |
Family
ID=15731038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16122778A Granted JPS5589903A (en) | 1978-08-04 | 1978-12-28 | Head shell and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5589903A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0159182U (en) * | 1987-10-09 | 1989-04-13 |
-
1978
- 1978-12-28 JP JP16122778A patent/JPS5589903A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0159182U (en) * | 1987-10-09 | 1989-04-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5589903A (en) | 1980-07-08 |
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