JPS6334113A - Manufacture of cylindrical bearing - Google Patents
Manufacture of cylindrical bearingInfo
- Publication number
- JPS6334113A JPS6334113A JP17916486A JP17916486A JPS6334113A JP S6334113 A JPS6334113 A JP S6334113A JP 17916486 A JP17916486 A JP 17916486A JP 17916486 A JP17916486 A JP 17916486A JP S6334113 A JPS6334113 A JP S6334113A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- shaft
- mold
- tubular body
- under
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 238000000034 method Methods 0.000 claims abstract description 3
- 239000011347 resin Substances 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- 230000004323 axial length Effects 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 2
- 238000007906 compression Methods 0.000 abstract 2
- 238000001746 injection moulding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
- B29C45/14221—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure by tools, e.g. cutting means
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は円筒状ベアリングの製造方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method of manufacturing a cylindrical bearing.
（実施例）
従来よ５、ＣＤプレーヤの光ピツクアップレンズ駆動装
置等の様な精密な動作が要求される部分に用いられる円
筒状ベアリングは、その内径を、挿入されるシャフトの
外径に出来るだけ一致させてガタつき等をなくす様にし
てい°た。(Example) Conventionally, the inner diameter of a cylindrical bearing used in parts that require precision movement, such as the optical pickup lens driving device of a CD player, can be made to be the outer diameter of the shaft into which it is inserted. I was trying to eliminate wobbling by matching only the parts.
（発明が解決しようとする問題点）
しかしながら、この様にベアリングの内径の精度を上げ
るほど、そこに挿入されるシャフトとのぬれ性が良くな
り、ステックスリップ現象が起きてスムースな抜き差し
が行いにくくなる欠点があった。(Problem to be solved by the invention) However, as the accuracy of the inner diameter of the bearing is increased, the wettability with the shaft inserted there becomes better, and the stick-slip phenomenon occurs, making it difficult to insert and remove smoothly. There was a drawback.
（問題点を解決する為の手段）
本発明はシャフトにベアリングを挿入した状態でベアリ
ングをその軸方向にわずかに押しつぶす様にするもので
ある。(Means for Solving the Problems) The present invention is designed to slightly compress the bearing in its axial direction when the bearing is inserted into the shaft.
（作用）
従ってベアリングの内面に変形が生じてシャフトとの接
触面積が減少し、ぬれ性が悪くなって摩擦係数が減少す
る。(Function) Therefore, the inner surface of the bearing is deformed, the contact area with the shaft is reduced, the wettability is deteriorated, and the coefficient of friction is reduced.
（実施例）
図は本発明に適用しうる射出成形機の成形型の一実施例
を示す要部断面図である。図において、外径が２龍のシ
ャフト６は肉厚０，７５ｉｒｍの円筒状ベアリング５に
挿入され、これらの間の間隙は７μ〜１０μになされて
いる。上記シャフト６の上部の一端８はベアリング５か
ら突き出ており、この一端８は成形型の上型１の凹部７
内に挿入され、ベアリング５の下部は下型２の凹部９内
に挿入され、この状態で上型１の空所３内に樹脂が注入
され、ベアリング５がインサート成形される。(Example) The figure is a sectional view of essential parts showing an example of a mold of an injection molding machine to which the present invention can be applied. In the figure, a shaft 6 with an outer diameter of 2 mm is inserted into a cylindrical bearing 5 with a wall thickness of 0.75 irm, and the gap therebetween is 7 μ to 10 μ. One end 8 of the upper part of the shaft 6 protrudes from the bearing 5, and this end 8 is connected to the recess 7 of the upper die 1 of the mold.
The lower part of the bearing 5 is inserted into the recess 9 of the lower mold 2, and in this state, resin is injected into the cavity 3 of the upper mold 1, and the bearing 5 is insert-molded.
この様な射出成形型を用いた成形工程を説明するに、先
ずベアリング５は、アルミ製の円筒状体とし、その軸方
向の長さは、型閉めが行われた状態での空所３の天井面
１０と、下型２の凹部９の底面１１との間隔８１１ｉＩ
よりも２０〜６０μｍ穆度長くし、その内径をシャフト
６の外径にほぼ等しくする。この様なベアリング５を下
型２の凹部９に挿入し、図示の如く上型１により型閉め
すると、ベアリング５は軸方向に押し縮められて、その
内面１２が図の様に歪み、シャフト６との接触面積が減
少する。この様な状態で空所３内に樹脂が注入されてベ
アリング５がインサート成形される。この様にシャフト
６とベアリング５との静摩擦係数が減少し、スティック
スリップ現象も起きにくくなる。To explain the molding process using such an injection mold, first, the bearing 5 is a cylindrical body made of aluminum, and its axial length is the same as that of the cavity 3 when the mold is closed. Distance 811iI between the ceiling surface 10 and the bottom surface 11 of the recess 9 of the lower mold 2
The inner diameter of the shaft 6 is approximately equal to the outer diameter of the shaft 6. When such a bearing 5 is inserted into the recess 9 of the lower mold 2 and the mold is closed with the upper mold 1 as shown, the bearing 5 is compressed in the axial direction, its inner surface 12 is distorted as shown, and the shaft 6 The contact area with the material decreases. In this state, resin is injected into the cavity 3 and the bearing 5 is insert-molded. In this way, the coefficient of static friction between the shaft 6 and the bearing 5 is reduced, and the stick-slip phenomenon becomes less likely to occur.
上述の実施例では、シャフトを挿入した状態で円筒状体
の内面を変形させる為に射出成形機を用いたが、これに
限らず、円筒状体を軸方向に圧縮出来る他の装置を用い
てもよいことはもち論である。In the above embodiment, an injection molding machine was used to deform the inner surface of the cylindrical body with the shaft inserted, but the present invention is not limited to this, and other devices capable of compressing the cylindrical body in the axial direction may be used. What is good is a theory.
（効果）
以上の様に本発明によれば、シャフトとベアリングの接
触面積が減少し、ベアリングの回動が容易となり、又軸
方向の移動もスムースでステックスリップ現象も生じに
くい。(Effects) As described above, according to the present invention, the contact area between the shaft and the bearing is reduced, the rotation of the bearing is facilitated, the movement in the axial direction is also smooth, and the stick-slip phenomenon is less likely to occur.
図は本発明で用いることの出来る射出成形機の一実施例
を示す断面図である。The figure is a sectional view showing one embodiment of an injection molding machine that can be used in the present invention.
Claims (1)
挿入し、該円筒体を軸方向に圧縮変形させる円筒状ベア
リングの製造方法。A method for manufacturing a cylindrical bearing, in which a shaft approximately equal to the inner diameter of the cylindrical body is inserted into the center of the cylindrical body, and the cylindrical body is compressed and deformed in the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17916486A JPS6334113A (en) | 1986-07-30 | 1986-07-30 | Manufacture of cylindrical bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17916486A JPS6334113A (en) | 1986-07-30 | 1986-07-30 | Manufacture of cylindrical bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6334113A true JPS6334113A (en) | 1988-02-13 |
Family
ID=16061058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17916486A Pending JPS6334113A (en) | 1986-07-30 | 1986-07-30 | Manufacture of cylindrical bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6334113A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113954292A (en) * | 2021-10-26 | 2022-01-21 | 广东东亚电器有限公司 | Injection mold for double-color hinged automobile part |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5568169A (en) * | 1978-11-14 | 1980-05-22 | Ricoh Co Ltd | Production of split type plain bearing |
-
1986
- 1986-07-30 JP JP17916486A patent/JPS6334113A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5568169A (en) * | 1978-11-14 | 1980-05-22 | Ricoh Co Ltd | Production of split type plain bearing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113954292A (en) * | 2021-10-26 | 2022-01-21 | 广东东亚电器有限公司 | Injection mold for double-color hinged automobile part |
| CN113954292B (en) * | 2021-10-26 | 2023-12-01 | 广东东亚电器有限公司 | Injection mold for bicolor hinged automobile part |
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