JPS6345013A - Preparation of bearing retainer made of synthetic resin - Google Patents
Preparation of bearing retainer made of synthetic resinInfo
- Publication number
- JPS6345013A JPS6345013A JP18979086A JP18979086A JPS6345013A JP S6345013 A JPS6345013 A JP S6345013A JP 18979086 A JP18979086 A JP 18979086A JP 18979086 A JP18979086 A JP 18979086A JP S6345013 A JPS6345013 A JP S6345013A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding
- cavity
- ball
- bearing retainer
- 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
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 15
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 15
- 238000000465 moulding Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 claims description 2
- 238000009751 slip forming Methods 0.000 claims 1
- 238000007796 conventional method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 235000002597 Solanum melongena Nutrition 0.000 description 1
- 244000061458 Solanum melongena Species 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000463 material Substances 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (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、合成樹脂製ベアリングリテーナの製造方法に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a synthetic resin bearing retainer.
第１５図に示した如き形状で内部が肉抜きされて成る合
成樹脂製ベアリングリテーナ５の製造方法として、例え
ば特開昭５８−０２８２４号公報。A method of manufacturing a synthetic resin bearing retainer 5 having a shape shown in FIG. 15 and having a hollowed out interior is disclosed in, for example, Japanese Patent Laid-Open No. 58-02824.
実開昭５９−８１８１３号公報及び実開昭５９−８１８
１４号公報には、第１６図に示した如く、固定側型板１
と、図示しない移動側型板に設けられた下型駒２及び先
端部が球形の一部をなす型部品３との間にリテーナ５の
環状部５ａ形成用キャビティ４ａ及びボール保持部５ｂ
形成用キャビティ４ｂから成り、両キャビティ４ａ、４
ｂに溶融合成樹脂を注入固化せしめた後、まず固定側型
板ｌを下型駒２から分離し、続いて型部品３を突き出す
ことにより成形品（リテーナ）５を下型駒２から分離し
、更に型部品３から成形品５を分離するように構成され
ていた。Utility Model Application No. 59-81813 and Utility Model Application No. 59-818
Publication No. 14 describes a fixed side template 1 as shown in FIG.
A cavity 4a for forming the annular portion 5a of the retainer 5 and a ball holding portion 5b are formed between the lower die piece 2 provided on the movable side template (not shown) and the die part 3 whose tip portion forms a part of a sphere.
It consists of a forming cavity 4b, and both cavities 4a, 4.
After injecting and solidifying the molten synthetic resin into b, first, the stationary side template l is separated from the lower mold piece 2, and then the molded product (retainer) 5 is separated from the lower mold piece 2 by pushing out the mold part 3. , and was further configured to separate the molded product 5 from the mold part 3.
ところが、上記従来方法の場合、型部品３がら成形品５
を分離する際、第１７図に示した如く、その型抜き方向
が固定側型板１と下型駒２との分離方向と一致している
のが９通であって、型部品３の先端部３ａの直径ｄ、が
成形品５のボール保持部５ｂの開口部ｓｂ’、ｓｂ″の
巾ａＸ （第１７図（Ａ）参照）よりも大なので、開
口部５ｂ’が無理に押し開かれて変形しく第１７図（Ｂ
）参照）、ボール保持部５ｂの内面が完全な球面となら
ない欠点があり、その結果ボールを的６１１に保持でき
ないという問題があった。However, in the case of the above conventional method, the molded product 5 is removed from the mold part 3.
As shown in FIG. 17, when separating the mold parts 3, there are 9 pieces whose die cutting direction is the same as the separating direction of the stationary side template 1 and the lower die piece 2, and the tip of the die part 3 is separated. Since the diameter d of the part 3a is larger than the width aX of the openings sb' and sb'' of the ball holding part 5b of the molded product 5 (see FIG. 17(A)), the opening 5b' is forced open. Figure 17 (B
), there is a drawback that the inner surface of the ball holding portion 5b is not a perfect spherical surface, and as a result, there is a problem that the ball cannot be held on the target 611.
又、上記従来方法では、型部品３の先端部３ａの厚みと
キャビティ４の厚みとが同一なので、第１８図に示した
如く、ボール保持部５ｂの内側から径方向にバリ６が発
生するという欠点があった。Furthermore, in the above conventional method, since the thickness of the tip 3a of the mold part 3 and the thickness of the cavity 4 are the same, burrs 6 are generated in the radial direction from the inside of the ball holding part 5b, as shown in FIG. There were drawbacks.
その結果、成形したボール保持部５ｂにボールを保持さ
せた場合、バリ６がボールとボール保持部５ｂとの間に
入り込んだり、またバリ６がボール表面と接触するなど
してボールの回転摩擦抵抗が増大し、ボールが円滑に回
転しないという問題があった。As a result, when a ball is held in the molded ball holding part 5b, the burr 6 may enter between the ball and the ball holding part 5b, or the burr 6 may come into contact with the ball surface, resulting in resistance to rotational friction of the ball. There was a problem in that the ball did not rotate smoothly.
本発明は、上記問題点に鑑み、ボール保持Ｒ能が的確で
、しかも、ボールが円滑に回転するベアリングリテーナ
を得ることができる合成樹脂製ベアリングリテーナの製
造方法を提供することを目的とする。In view of the above-mentioned problems, an object of the present invention is to provide a method for manufacturing a synthetic resin bearing retainer that can obtain a bearing retainer that has accurate ball holding R ability and allows balls to rotate smoothly.
〔問題点を解決するための手段及び作用〕本発明による
合成樹脂製ベアリングリテーナの製造方法は、固定側型
板と移動側型板に設けられた下型駒及び先端部が球形の
一部をなす型部品との間に環状部成形用キャビティとポ
ール保持部成形用キャビティとが連続して成るキャビテ
ィを構成すると共に、前記型部品の先端部の厚みを前記
ポール保持部成形用キャビティの厚みより大で且つボー
ル保持部の開口部の巾より小にし、更に前記型部品が前
記下型駒に対して型抜き方向に相対移動し、且つその移
動軸のまわりに回動し得るようにした金型を使用し、前
記金型を閉じた状態で前記キャビティ内に？８融合成樹
脂材を充填した後固化せしめる第１工程と、前記固定側
型板と前記下型駒及び型部品との間を開く第２工程と、
前記型部品を前記下型駒に対して回動させる第３工程と
、成形品を突き出して金型から取出す第４工程とから成
ることにより、型抜きの際に成形品のボール保持部の開
口部に無理な力が加わらないようにすると共に、バリが
発生しても型部品の先端部の周面に沿って発生するよう
にしたものである。[Means and effects for solving the problems] The method for manufacturing a synthetic resin bearing retainer according to the present invention is such that the lower die pieces and the tip portions provided on the stationary side template and the movable side template are partially spherical. A cavity for forming an annular part and a cavity for molding a pole holding part are formed in succession between the eggplant mold part and the thickness of the tip part of the mold part is set to be greater than the thickness of the cavity for molding the pole holding part. The mold is large and smaller than the width of the opening of the ball holding part, and further allows the mold part to move relative to the lower mold piece in the mold cutting direction and to rotate around its movement axis. Use a mold and place the mold inside the cavity with the mold closed? 8. A first step of filling and solidifying the fused synthetic resin material, and a second step of opening between the fixed side mold plate and the lower mold piece and mold parts,
The opening of the ball holding part of the molded product is removed when the mold is removed by the third step of rotating the mold part relative to the lower mold piece, and the fourth step of ejecting the molded product from the mold. This prevents excessive force from being applied to the mold part, and even if burrs occur, they occur along the circumferential surface of the tip of the mold part.
以下図示した一実施例に基づき本発明の詳細な説明すれ
ば、第１図において、１１は固定側取付板、１２は該固
定側取付は板１１から挿入されたガイドピンである。１
３及び１４は該ガイドピン１２により案内されるランナ
ストリッパプレート及び固定側型板であって、上記固定
側取付板１１からランナストリフパブレート１３にかけ
てスプル１５が、また、固定側型板１４にランナ１６゜
ゲート１７が夫々形成されている。１８は移動側取付板
、１９はスペーサブロック２０を介して上記移動側取付
板１８に固定され且つガイドピン１２によって案内され
る移動側型板、２１は第２図に示した如く、外周駒２１
ａと内周駒２１ｂとから成るとともに第１図に示した如
（移動側型板１９内に嵌合せしめられた下型駒であり、
上記固定側型ｖｉ１４との接合によりキャビティ２３、
すなわちリテーナ５の環状部形成用キャビティ２３ａと
ポール保持部形成用キャビティ２３ｂとが連続して形成
される。２２は第３図に示した如く円板形の先端部２２
ａと円柱上の基部２２ｂとから成る型部品である。この
型部品２２は第２図に示した如く同一円周上に等間隔に
位置するようにして移動側型板１９及び下型駒２１に回
転及び摺動可能に貫通せしめられたものであり、第４図
に示した如く、上記先端部２２ａの径ｄは成形品である
リテーナ２４のボール保持部２４ｂの開口部２４ｂ″の
ｉｌ ｗよりも従来同様大であるが、先端部２２ａの厚
みｔｌは後述する理由からりテーナボール保持部成形用
キャビティ２３ｂの厚み（ボール保持部２４ｂの厚み）
ｔｚより大であるとともにボール保持部２４ｂの開口部
２４ｂ′の巾Ｗより小となっている。又、第３図（Ａ）
、ＣＢ）に示した如く基部２２ｂの周面には、下型駒２
１の外周駒２１ａ （内周駒２１ｂでもよい）に植設さ
れたピン２５と滑合するカム溝２２Ｃが形成されており
、第９図に示す成形品２４を取り出す際、型部品２２は
突き出し板２６を介して突き出し棒２７より軸方向に押
圧せしめられるのに伴い９０゜回動せしめられるように
なっている（第５図参照）。尚、上記図示例においては
カム溝２２ｃを型部品２２に形成するとともにピン２５
を外周駒２５に植立したが、型部品２２にピン２５を植
立するとともに外周駒２５にカム溝２２ ｃを設けるよ
うに構成しても良い。又、第６図に示した如く、カム’
ｔｎ ２２ ｃの形状を曲線と軸に平行な直線との組み
合わせにして、最初摺動兼回動が行われ、続いて摺動が
行われるように構成しても良い。The present invention will be described in detail below based on the illustrated embodiment. In FIG. 1, reference numeral 11 indicates a fixed side mounting plate, and 12 indicates a guide pin inserted from the fixed side mounting plate. 1
Reference numerals 3 and 14 denote a runner stripper plate and a stationary template plate guided by the guide pin 12, and a sprue 15 extends from the stationary side mounting plate 11 to the runner stripper plate 13, and a sprue 15 is connected to the stationary template plate 14. A runner 16° gate 17 is formed respectively. 18 is a moving side mounting plate, 19 is a moving side template fixed to the moving side mounting plate 18 via a spacer block 20 and guided by a guide pin 12, and 21 is an outer peripheral piece 21 as shown in FIG.
a and an inner peripheral piece 21b, as shown in FIG.
The cavity 23 is formed by joining with the fixed side mold vi14,
That is, the cavity 23a for forming the annular portion of the retainer 5 and the cavity 23b for forming the pole holding portion are formed continuously. 22 is a disc-shaped tip 22 as shown in FIG.
It is a mold part consisting of a and a cylindrical base 22b. As shown in FIG. 2, the mold parts 22 are rotatably and slidably penetrated through the movable mold plate 19 and the lower mold piece 21 so as to be located at equal intervals on the same circumference. As shown in FIG. 4, the diameter d of the tip 22a is larger than the opening 24b'' of the ball holding portion 24b of the molded retainer 24, as in the conventional case, but the thickness tl of the tip 22a is the thickness of the cavity 23b for molding the ball holding part (thickness of the ball holding part 24b) for reasons described later.
It is larger than tz and smaller than the width W of the opening 24b' of the ball holding part 24b. Also, Figure 3 (A)
, CB), a lower die piece 2 is provided on the circumferential surface of the base 22b.
A cam groove 22C is formed that slides on a pin 25 implanted in the outer circumferential piece 21a (or the inner circumferential piece 21b) of No. 1, and when taking out the molded product 24 shown in FIG. As it is pressed in the axial direction by the ejector rod 27 via the plate 26, it is rotated through 90 degrees (see FIG. 5). In the example shown above, the cam groove 22c is formed in the mold part 22, and the pin 25 is
Although the pins 25 are set on the outer circumferential piece 25, the structure may be such that the pins 25 are set on the mold part 22 and the cam grooves 22c are provided on the outer circumferential piece 25. Also, as shown in Figure 6, the cam'
The shape of tn 22 c may be a combination of a curved line and a straight line parallel to the axis so that sliding and rotation are performed first, and then sliding is performed.
次に上記金型を用いてのボールベアリングリテーナの成
形方法を説明する。Next, a method of molding a ball bearing retainer using the above mold will be explained.
第１図は金型が閉じられた型締状態を示している。この
状態で、第７図に示す成形機ノズル２８によりスプル１
５．ランナ１６．ゲート１７を通してキャビティ２３内
に溶融状態にある合成樹脂２９を注入する。所定時間経
過して合成樹脂２９が固化した後、第８図に示した如く
移ｅ側型阪１９等を固定側取付板１１より引き離すよう
にして型開きを行えば、まず、ランナストリフバブレー
ト１３と固定側型板１４とが開かれて固化状態のランナ
２９ａが金型から離脱する。続いて固定側型板１４と移
動側型板１９及び下型駒２−１との間が開かれて、成形
品２４が下型駒２１に保持された状態で露出する０次に
、第９図に示した如く突き出し棒２７により突き出し板
２６を介して型部品２２を矢印方向に突き出すと、型部
品２２が９０°回動せしめられた後成形品２４が下型駒
２１から分離する。この回動時の型部品２２の状態を拡
大図示したものが第１０図である。第１０図によれば、
先端部２２ａの厚みｔｌは成形品２４のボール保持部２
４ｂの開口部２４ｂ’、２４ｂ’間の巾Ｗより小さい。FIG. 1 shows the mold in a closed state. In this state, the sprue 1 is
5. Runner 16. A synthetic resin 29 in a molten state is injected into the cavity 23 through the gate 17. After the synthetic resin 29 has solidified after a predetermined period of time has elapsed, the mold is opened by separating the transfer side mold plate 19 from the fixed side mounting plate 11 as shown in FIG. The plate 13 and the stationary mold plate 14 are opened, and the solidified runner 29a is removed from the mold. Subsequently, the spaces between the stationary side template 14, the movable side template 19, and the lower mold piece 2-1 are opened, and the molded product 24 is exposed while being held by the lower mold piece 21. As shown in the figure, when the mold part 22 is ejected in the direction of the arrow by the ejector rod 27 through the ejector plate 26, the mold part 22 is rotated 90 degrees and the molded product 24 is separated from the lower mold piece 21. FIG. 10 is an enlarged view of the state of the mold part 22 during this rotation. According to Figure 10,
The thickness tl of the tip portion 22a is the same as that of the ball holding portion 2 of the molded product 24.
4b is smaller than the width W between the openings 24b' and 24b'.
従って先端部２２ａはボール保持部２４ｂの開口部２４
ｂ″に対し無理な力を加えることなくボール保持部２４
ｂから抜き出される。その結果、ボール保持部２４ｂは
変形せず、その内径が均一のまま即ち完全な球面形状が
保持される。Therefore, the tip portion 22a is located at the opening 24 of the ball holding portion 24b.
ball holding portion 24 without applying excessive force to
It is extracted from b. As a result, the ball holding portion 24b is not deformed, and its inner diameter remains uniform, that is, a perfect spherical shape is maintained.
従って、この成形法によるボール保持部２４ｂにボール
を嵌挿した場合、ボールは該ボール保持部２４ｂの内面
全面に同一圧力で接触し、的確に保持される。Therefore, when a ball is inserted into the ball holding part 24b formed by this molding method, the ball contacts the entire inner surface of the ball holding part 24b with the same pressure and is held accurately.
又、上記金型の成形工程において、型部品２２の先端部
２２ａの厚み１．はボール保持部成形用キャビティ２３
ｂの厚み（成形品２４のボール保持部２４ｂの厚み）ｔ
２より大となっている。その関係下で成形品２４は射出
成形されるので、第１１図に示した如くボール保持部２
４ｂに発生するバリ３０は保持部の内面に沿う方向に形
成される。このバリ３０はボール表面と直交して接触す
る関係にはないので、ボールの回転摩擦抵抗が増加して
ボールの回転を妨げることがなく、しかも、ボールを保
持するようにボール表面と接触するので、ボールの保持
がより的確となる利点がある。In addition, in the molding process of the mold, the thickness of the tip portion 22a of the mold component 22 is 1. is the cavity 23 for molding the ball holding part.
Thickness b (thickness of ball holding portion 24b of molded product 24) t
It is larger than 2. Under this relationship, the molded product 24 is injection molded, so as shown in FIG.
The burr 30 generated on the holder 4b is formed in a direction along the inner surface of the holding part. Since the burr 30 is not in perpendicular contact with the ball surface, it does not increase the rotational frictional resistance of the ball and hinder the rotation of the ball, and moreover, it contacts the ball surface in a way that holds the ball. This has the advantage that the ball can be held more accurately.
その後、空気を吹き付ける等の手段により成形品２４が
型部品２２から分離され、一連の金型射出成形動作が終
了する。Thereafter, the molded product 24 is separated from the mold component 22 by means such as blowing air, and the series of mold injection molding operations is completed.
上記型部品２２の回動手段としては、上述の如きピン２
５とカム７ｓ２２ ｃによる手段の他に、例えば第１２
図及び第１３図に示した如く、型部品２２の基部２２ｂ
にギヤ部２２ｄを設け、図示しないモータと直結された
ピニオン３１９１円盤状ギヤ３２を介して内側から一連
の型部品２２を回動せしめる構造にしても良い、尚、３
３はＥリングである、又第１４図に示した如く円盤状ギ
ヤ３２の代りにリング状ギヤ３４を用いて外側から一連
の型部品２２を回動せしめる構造にしても良い。As a means for rotating the mold part 22, the pin 2 as described above is used.
5 and the cam 7s22c, for example, the 12th
As shown in the figure and FIG. 13, the base 22b of the mold part 22
A gear part 22d may be provided in the mold part 22d, and a series of mold parts 22 may be rotated from the inside via a pinion 3191 and a disc-shaped gear 32 directly connected to a motor (not shown).
Reference numeral 3 designates an E-ring. Also, as shown in FIG. 14, a ring-shaped gear 34 may be used instead of the disk-shaped gear 32 to rotate the series of mold parts 22 from the outside.
これらの場合には、型部品２２を回動せしめた後、突き
出しピン等によりベアリングリテーナを突き出し分離さ
せる。更に、本発明による製法はポールに限らず、種々
の形状のもの例えばローラ等の回転部材のベアリングリ
テーナにも応用できる。In these cases, after the mold part 22 is rotated, the bearing retainer is ejected and separated using an ejector pin or the like. Furthermore, the manufacturing method according to the present invention can be applied not only to poles but also to bearing retainers of various shapes such as rotating members such as rollers.
上述の如（、本発明の方法によれば、回転部材の保持機
能が的確で、しかも回転部材が円滑に回転するベアリン
グリテーナが得られる利点を有している。As described above, the method of the present invention has the advantage of providing a bearing retainer that has an accurate holding function for the rotating member and allows the rotating member to rotate smoothly.
第１図は本発明による合成樹脂製ベアリングリテーナの
製造方法の一実施例に用いる金型の断面図、第２図は上
記金型の下型駒の一部破断平面図、第３図（Ａ）及び（
Ｂ）は夫々上記金型の型部品まわりの斜視図及びＢ−Ｂ
線断面図、第４図（Ａ）、ＣＢ）及び（Ｃ）は夫々上記
金型の型部品の先端部まわりの拡大断面図、Ｂ−Ｂ線断
面図及びＣ−Ｃ線断面図、第５図は上記型部品が回動セ
しめられた状態を示す斜視図、第６図は型部品の変形例
の斜視図、第７図乃至第９図は本発明方法の工程を示す
断面図、第１０図は上記工程において型部品が回動した
時の先端部の状態を示す拡大断面図、第１１図（Ａ）及
び（Ｂ）は夫々上記工程におけるパリ発生状態を示す要
部拡大斜視図及びＢ−Ｂ線断面図、第１２図及び第１３
図は夫々型部品の変形例の断面図及びそれを駆動する機
構の平面図、第１４図は型部品駆動機構の変形例の平面
図、第１５図は合成樹脂製ボールベアリングリテーナの
斜視図、第１６図は従来例の金型の要部拡大断面図、第
１７図（Ａ）及びＣＢ）は従来例における型抜き状態を
示す要部拡大断面図、第１８図（Ａ）及び（Ｂ）は夫々
従来例におけるバ発生状態を示す要部拡大斜視図及びＢ
−Ｂ線断面図である。
１１・・・・固定側取付板、１２・・・・ガイドピン、
１３・・・・ランナストリッパプレート、１４・・・・
固定側型板、１５・・・・スプル、１６１．・・ランナ
、１７・・・・ゲート、１８・・・・移動側取付板、１
９・・・・移動側型板、２０・・・・スペーサブロック
、２１・・・下型駒、２２・・・・型部品、２３・・・
・キャビティ、２４・・・・成形品としてのリテーナ、
２５・・・・ピン、２６・・・・突き出し板、２７・・
・・突き出し棒、２８・・・・成形機ノズル、２９・・
・・合成樹脂、３０・・・・ハリ、３１・・・・ピニオ
ン、３２・・・・円盤状ギヤ、３３・・・・Ｅリング、
３４・・・・リング状ギヤ。
第１ 図
で
へ
喫
′：ｌ−５図 ５ｊ−６図
オフ図
２２ａ
牙１２図FIG. 1 is a sectional view of a mold used in an embodiment of the method for manufacturing a synthetic resin bearing retainer according to the present invention, FIG. 2 is a partially cutaway plan view of the lower mold piece of the mold, and FIG. 3 (A) as well as(
B) is a perspective view of the mold parts of the above mold and B-B respectively.
Line sectional view, FIGS. 4(A), CB) and (C) are respectively enlarged sectional views around the tip of the mold part of the mold, BB sectional view and CC line sectional view, 5th 6 is a perspective view of a modified example of the mold component; FIGS. 7 to 9 are sectional views showing the steps of the method of the present invention; FIG. 10 is an enlarged sectional view showing the state of the tip when the mold part rotates in the above process, and FIGS. 11 (A) and (B) are enlarged perspective views of the main parts showing the state of occurrence of paris in the above process, respectively. BB line sectional view, Figures 12 and 13
The figures are a sectional view of a modified example of the mold component and a plan view of a mechanism that drives it, FIG. 14 is a plan view of a modified example of the mold component drive mechanism, and FIG. 15 is a perspective view of a synthetic resin ball bearing retainer. Fig. 16 is an enlarged cross-sectional view of the main part of the conventional mold, Fig. 17 (A) and CB) are enlarged cross-sectional views of the main part showing the state of mold removal in the conventional example, and Fig. 18 (A) and (B). B is an enlarged perspective view of the main part showing the state of occurrence of burr in the conventional example, and B
-B sectional view. 11... Fixed side mounting plate, 12... Guide pin,
13...Runner stripper plate, 14...
Fixed side template, 15... sprue, 161. ...Runner, 17...Gate, 18...Movement side mounting plate, 1
9...Moving side template, 20...Spacer block, 21...Lower mold piece, 22...Mold parts, 23...
・Cavity, 24... Retainer as a molded product,
25...pin, 26...protrusion plate, 27...
...Ejector rod, 28...Molding machine nozzle, 29...
...Synthetic resin, 30...Harness, 31...Pinion, 32...Disc-shaped gear, 33...E-ring,
34...Ring gear. Figure 1: Figure l-5 Figure 5j-6 Off-line figure 22a Fang 12 figure
Claims (1)
材保持部成形用キャビテイとが固定側型板と移動側型板
の密接により連続形成されるとともに、上記回転部材保
持部成形用キャビテイは先端部が円板状の型部品と該型
部品をスライドするように保持する金型駒とにより形成
される金型を用い、合成樹脂を素材にして射出成形され
、金型を開く一連の動作を行なった後に取り出される成
形されたベアリングリテーナの回転部材保持部に回転部
材を嵌合保持させて使用されるベアリングリテーナの製
造方法において、 上記型部品は円板状先端部の肉厚が上記回転部材保持部
の肉厚よりも大きいとともに該回転部材保持部の開口幅
よりも小さく形成されており、上記型部品の先端部が上
記回転部材保持部成形用キャビテイを形成する状態下で
射出成形してベアリングリテーナを形成する第１工程と
、上記移動側型板をスライド開放して、上記型部品の先
端部に保持されたベアリングリテーナを上記移動側型板
において露出せしめる第２工程と、上記移動側型板が停
止した状態下で上記型部品を回動し、その先端部を上記
回転部材保持部に対して略９０度に位置せしめる第３工
程と、ベアリングリテーナを突き出して金型から取り出
す第４工程とからなることを特徴とする合成樹脂製ベア
リングリテーナの製造方法。[Scope of Claims] The cavity for molding the annular part of the bearing retainer and the cavity for molding the rotating member holding part are continuously formed by the close contact between the stationary side mold plate and the movable side mold plate, and the cavity for molding the rotating member holding part is injection molded from synthetic resin using a mold formed by a mold part with a disc-shaped tip and a mold piece that holds the mold part in a sliding manner, and a series of steps to open the mold. In a method for manufacturing a bearing retainer in which a rotating member is fitted and held in a rotating member holding portion of a molded bearing retainer that is taken out after an operation is performed, the mold part has a wall thickness of a disc-shaped tip part that is above the above. It is formed to be larger than the wall thickness of the rotating member holding part and smaller than the opening width of the rotating member holding part, and injection molding is performed under a condition in which the tip of the mold part forms a cavity for molding the rotating member holding part. a first step of forming a bearing retainer, a second step of sliding open the movable mold plate to expose the bearing retainer held at the tip of the mold part on the movable mold plate; A third step of rotating the mold part while the movable mold plate is stopped and positioning its tip at approximately 90 degrees with respect to the rotating member holding part, and protruding the bearing retainer to take it out from the mold. A method for manufacturing a synthetic resin bearing retainer, comprising a fourth step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18979086A JPS6345013A (en) | 1986-08-13 | 1986-08-13 | Preparation of bearing retainer made of synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18979086A JPS6345013A (en) | 1986-08-13 | 1986-08-13 | Preparation of bearing retainer made of synthetic resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6345013A true JPS6345013A (en) | 1988-02-26 |
| JPH0366130B2 JPH0366130B2 (en) | 1991-10-16 |
Family
ID=16247247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18979086A Granted JPS6345013A (en) | 1986-08-13 | 1986-08-13 | Preparation of bearing retainer made of synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6345013A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008002528A (en) * | 2006-06-21 | 2008-01-10 | Nsk Ltd | Rolling element storage belt for linear motion guide device, linear motion guide device, mold for manufacturing rolling element storage belt, and method of manufacturing rolling element storage belt using the mold |
-
1986
- 1986-08-13 JP JP18979086A patent/JPS6345013A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008002528A (en) * | 2006-06-21 | 2008-01-10 | Nsk Ltd | Rolling element storage belt for linear motion guide device, linear motion guide device, mold for manufacturing rolling element storage belt, and method of manufacturing rolling element storage belt using the mold |
| JP4600355B2 (en) * | 2006-06-21 | 2010-12-15 | 日本精工株式会社 | ROLLING BODY CONTAINING BELT FOR LINEAR GUIDE DEVICE, DIRECTION GUIDING DEVICE, ROLLING BODY CONTAINING BELT MANUFACTURING MOLD, AND ROLLING BODY CONTAINING BELT MANUFACTURING METHOD USING SAME |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0366130B2 (en) | 1991-10-16 |
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