JPH0366130B2 - - Google Patents
Info
- Publication number
- JPH0366130B2 JPH0366130B2 JP18979086A JP18979086A JPH0366130B2 JP H0366130 B2 JPH0366130 B2 JP H0366130B2 JP 18979086 A JP18979086 A JP 18979086A JP 18979086 A JP18979086 A JP 18979086A JP H0366130 B2 JPH0366130 B2 JP H0366130B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- bearing retainer
- rotating member
- cavity
- molding
- 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
- 238000000465 moulding Methods 0.000 claims description 14
- 229920003002 synthetic resin Polymers 0.000 claims description 14
- 239000000057 synthetic resin Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 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
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000000926 separation method Methods 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)
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、実開
昭59−81813号公報及び実開昭59−81814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とのリテーナ５
の環状部５ａ形成用キヤビテイ４ａ及びホール保
持部５ｂ形成用キヤビテイ４ｂから成り、両キヤ
ビテイ４ａ，４ｂに溶融合成樹脂を注入固化せし
めた後、まず固定側型板１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。
As a manufacturing method of the synthetic resin bearing retainer 5 having the shape shown in FIG. 15 and having a hollowed out interior, for example, Japanese Patent Application Laid-Open No. 58-02824, Japanese Utility Model Application Publication No. 59-81813, and Japanese Utility Model Application No. 59-81 Publication No. 81814 describes, as shown in FIG. 16, a stationary mold plate 1, a lower mold piece 2 provided on a movable mold plate (not shown), and a mold part 3 whose tip part forms part of a spherical shape. retainer 5
It consists of a cavity 4a for forming an annular part 5a and a cavity 4b for forming a hole holding part 5b.After injecting and solidifying molten synthetic resin into both cavities 4a and 4b, first, the stationary side mold plate 1 is separated from the lower mold piece 2. Then, by ejecting the mold part 3, the molded product (retainer) 5 is separated from the lower mold piece 2, and the molded product 5 is further separated from the mold part 3.
ところが、上記従来方法の場合、型部品３から
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普通であつて、型部品
３の先端部３ａの直径d1が成形品５のボール保持
部５ｂの開口部５b′，５b′の巾d2（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（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確に保持できないという問題
があつた。
However, in the case of the above conventional method, when separating the molded product 5 from the mold part 3, as shown in FIG.
Normally, the die cutting direction is the same as the separation direction of the stationary side template 1 and the lower die piece 2, and the diameter d 1 of the tip 3a of the die part 3 is the ball holding part of the molded product 5. Since the width d 2 (see FIG. 17A) of the openings 5b' and 5b' of the ball holding portion 5b is larger than the width d 2 (see FIG. 17A), the opening 5b' is forced open and deformed (see FIG. 17B). The disadvantage is that the inner surface of the material is not perfectly spherical.
As a result, there was a problem that the ball could not be held accurately.
又、上記従来方法では、型部品３の先端部３ａ
の厚みとキヤビテイ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つ
た。 Moreover, in the above conventional method, the tip 3a of the mold part 3
Since the thickness of the ball holding portion 5b is the same as that of the cavity 4, there is a drawback that burrs 6 are generated in the radial direction from the inside of the ball holding portion 5b, as shown in FIG.
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
があつた。 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. This caused the problem that the ball did not rotate smoothly.
本発明は、上記問題点に鑑み、ボール保持機能
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 of manufacturing a synthetic resin bearing retainer that can provide a bearing retainer that has an accurate ball holding function and allows the balls to rotate smoothly.
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ヤビテイとボール保持部成
形用キヤビテイとが連続して成るキヤビテイを構
成すると共に、前記型部品の先端部の厚みを前記
ボール保持部成形用キヤビテイの厚みより大で且
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
記キヤビテイ内に溶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
の周面に沿つて発生するようにしたものである。
The method for manufacturing a synthetic resin bearing retainer according to the present invention includes forming a cavity for molding an annular portion between a lower mold piece provided on a stationary side mold plate and a movable side mold plate and a mold part whose tip part forms a part of a spherical shape. and a cavity for molding the ball holding part constitute a continuous cavity, and the thickness of the tip of the mold part is larger than the thickness of the cavity for molding the ball holding part and wider than the width of the opening of the ball holding part. using a mold in which the part is made to be small in size and further allows the part to move relative to the lower die piece in the die cutting direction and rotate around its movement axis, and with the die closed. a first step of filling and solidifying a molten synthetic resin material into the cavity; a second step of opening between the stationary mold plate and the lower mold piece and mold parts; and a second step of filling the mold part with the lower mold piece. By consisting of the third step of rotating the molded product against the mold and the fourth step of ejecting the molded product from the mold, no undue force is applied to the opening of the ball holding part of the molded product during mold removal. In addition, 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を詳細に
説明すれば、第１図において、１１は固定側取付
板、１２は該固定側取付け板１１から挿入された
ガイドピンである。１３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ツパプレート
及び固定側型板であつて、上記固定側取付板１１
からランナストリツパプレート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はスペーサブロツク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１
２によつ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２１ａと内周駒２１ｂとか
ら成るとともに第１図に示した如く移動側型板１
９内に嵌合せしめられた下型駒であり、上記固定
側型板１４との接合によりキヤビテイ２３、すな
わちリテーナ５の環状部形成用キヤビテイ２３ａ
とボール保持部形成用キヤビテイ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２２ａ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２４
b′の巾ｗよりも従来同様大であるが、先端部２２
ａの厚みt1は後述する理由からリテーナボール保
持部成形用キヤビテイ２３ｂの厚み（ボール保持
部２４ｂの厚み）t2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より小となつ
ている。又、第３図Ａ，Ｂに示した如く基部２２
ｂの周面には、下型駒２１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
うになつている（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２
５にカム溝２２ｃを設けるように構成しても良
い。又、第６図に示した如く、カム溝２２ｃ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 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 11. As shown in FIG. Reference numerals 13 and 14 denote a runner stripper plate and a fixed side mold plate guided by the guide pin 12, which are connected to the fixed side mounting plate 11.
The sprue 15 is connected to the runner stripper plate 13, and the runner 16 is connected to the fixed side template 14.
A gate 17 is formed respectively. 18 is a moving side mounting plate; 19 is fixed to the moving side mounting plate 18 via a spacer block 20 and is connected to the guide pin 1;
The moving side template 21 is guided by the moving side template 1 as shown in FIG.
9 is a lower mold piece fitted into the mold plate 9, and by joining with the fixed side mold plate 14, a cavity 23, that is, a cavity 23a for forming the annular portion of the retainer 5 is formed.
and a ball holding portion forming cavity 23b are formed continuously. 22, as shown in FIG. 3, is a mold part consisting of a disk-shaped tip 22a 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 the diameter of the opening 24 of the ball holding portion 24b of the retainer 24, which is a molded product.
Although it is larger than the width w of b′ as in the conventional case, the tip portion 22
The thickness t 1 of a is larger than the thickness t 2 of the cavity 23b for molding the retainer ball holding part (thickness of the ball holding part 24b) and smaller than the width w of the opening 24b' of the ball holding part 24b, for reasons described later. It's summery. In addition, as shown in FIGS. 3A and 3B, the base 22
A cam groove 22c is formed on the circumferential surface of b, which slides into a pin 25 implanted in the outer circumferential piece 21a (or the inner circumferential piece 21b) of the lower mold piece 21, and the molded product shown in FIG. 24, the mold part 22 is pressed in the axial direction by the ejector rod 27 via the ejector plate 26, and 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 installed in the outer peripheral piece 25, but the pin 25 is installed in the mold part 22 and the outer peripheral piece 2
5 may be provided with a cam groove 22c. Further, as shown in Fig. 6, the shape of the cam groove 22c is a combination of a curved line and a straight line parallel to the axis, so that sliding and rotation is performed first, and then sliding is performed. Also good.
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１５、ランナ１６、ゲート１７を通
してキヤビテイ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図に示した如く移動側型板１
９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、ランナストリツパプレー
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２１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。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9°
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t1は成形品２４のボール
保持部２４ｂの開口部２４b′，２４b′間の巾ｗよ
り小さい。従つて先端部２２ａはボール保持部２
４ｂの開口部２４b′に対し無理な力を加えること
なくボール保持部２４ｂ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。 FIG. 1 shows the mold in a closed state. In this state, the molding machine nozzle 28 shown in FIG.
As a result, the synthetic resin 29 in a molten state is injected into the cavity 23 through the sprue 15, runner 16, and gate 17. After a predetermined period of time, the synthetic resin 29
After solidifying, move the moving side template 1 as shown in Fig. 8.
9 and the like from the fixed side mounting plate 11, the runner stripper plate 13 and the fixed side mold plate 14 are first opened, and the solidified runner 29a is removed from the mold. Subsequently, the space between the stationary mold plate 14, the movable mold plate 19, and the lower mold piece 21 is opened, and the molded product 24 held by the lower mold piece 21 is exposed. Next, as shown in FIG. 9, 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 moved at an angle of 9°.
After being rotated, the molded product 24 is separated from the lower die piece 21. FIG. 10 is an enlarged view of the state of the mold part 22 during this rotation. According to FIG. 10, the thickness t 1 of the tip 22a is smaller than the width w between the openings 24b' and 24b' of the ball holding part 24b of the molded product 24. Therefore, the tip portion 22a is the ball holding portion 2.
The ball can be pulled out from the ball holding portion 24b without applying excessive force to the opening 24b' of the ball 4b. 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.
従つて、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の内面全周に同一圧力で接触し、的確に
保持される。 Therefore, the ball holding portion 24b formed by this molding method
When a ball is inserted into the ball holding portion 24b, the ball contacts the entire inner circumference of the ball holding portion 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t1はボール保持部成形用キ
ヤビテイ２３ｂの厚み（成形品２４のボール保持
部２４ｂの厚み）t2より大となつている。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２４ｂ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 mold part 22
The thickness t 1 of the tip portion 22a is greater than the thickness t 2 of the ball holding portion molding cavity 23b (thickness of the ball holding portion 24b of the molded product 24). Under this relationship, the molded article 24 is injection molded, so the 11th
As shown in the figure, the burr 30 generated on the ball holding part 24b is formed in the 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２５とカム溝２２ｃ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３１、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、３３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。
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
ボールに限らず、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 addition to the pin 25 and cam groove 22c as described above, the means for rotating the mold part 22 may include a gear portion 22d on the base 22b of the mold part 22, as shown in FIGS. 12 and 13, for example. A structure may be adopted in which a series of mold parts 22 are rotated from the inside via a pinion 31 and a disc-shaped gear 32 that are provided and directly connected to a motor (not shown). Note that 33 is an E ring. Also, as shown in FIG. 14, a disc-shaped gear 32
Instead, a ring-shaped gear 34 may be used to rotate the series of mold parts 22 from the outside.
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 is applicable not only to balls but also to bearing retainers of various shapes such as rotating members such as rollers.
上述の如く、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，Ｂ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せ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バリ発生状態を
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Ｂ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……ランナストリツパプレート、１４……固
定側型板、１５……スプル、１６……ランナ、１
７……ゲート、１８……移動側取付板、１９……
移動側型板、２０……スペーサブロツク、２１…
…下型駒、２２……型部品、２３……キヤビテ
イ、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……バリ、３１……ピニオン、３２……円盤
状ギヤ、３３……Ｅリング、３４……リング状ギ
ヤ。
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 FIGS. 3A and B 4A, B and C are respectively an enlarged sectional view and a sectional view taken along the line B-B of the mold part of the above-mentioned mold. Figure and C-C line sectional view,
FIG. 5 is a perspective view showing the mold part in a rotated state, FIG. 6 is a perspective view of a modified example of the mold part, and 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. 11A and 11B are enlarged perspective views of main parts showing the state of burr generation in the above process, respectively, and B-B Line sectional view, 12th
13 and 13 are respectively a sectional view of a modified example of the mold part and a plan view of the mechanism that drives it, FIG. 14 is a plan view of a modified example of the mold component driving mechanism, and FIG. 15 is a synthetic resin ball bearing retainer. Perspective view of No. 16
The figure is an enlarged sectional view of the main part of a conventional mold, Fig. 17A
18A and 18B are an enlarged sectional view of a main part showing a state of mold removal in the conventional example, and FIGS. 18A and 18B are an enlarged perspective view of the main part and a sectional view taken along the line B--B, respectively, showing a state of burr generation in the conventional example. 11...Fixed side mounting plate, 12...Guide pin,
13...Runner stripper plate, 14...Fixed side template, 15...Sprue, 16...Runner, 1
7... Gate, 18... Moving side mounting plate, 19...
Moving side template, 20... Spacer block, 21...
... lower mold piece, 22 ... mold parts, 23 ... cavity, 24 ... retainer as molded product, 25 ...
Pin, 26... Ejector plate, 27... Ejector rod, 28... Molding machine nozzle, 29... Synthetic resin,
30...Flash, 31...Pinion, 32...Disk-shaped gear, 33...E-ring, 34...Ring-shaped gear.
Claims (1)
イと回転部材保持部成形用キヤビテイとが固定側
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ヤビテイは
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つ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
ヤ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] 1. A cavity for molding the annular part of the bearing retainer and a 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 formed continuously. The cavity is injection molded from synthetic resin using a mold formed by a mold part with a disc-shaped tip and a mold piece that slides and holds the mold part. 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 performing the above-mentioned operation, the mold part has a wall thickness of a disc-shaped tip. is formed to be larger than the wall thickness of the rotating member holder and smaller than the opening width of the rotating member holder, and the tip of the mold part forms a cavity for molding the rotating member holder. A first step of forming a bearing retainer by injection molding; and a second step of sliding the moving side mold plate open to expose the bearing retainer held at the tip of the mold part on the moving side 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 a third step of protruding the bearing retainer to remove the mold. A method for producing a synthetic resin bearing retainer, the method comprising: a fourth step of taking out a synthetic resin bearing retainer.
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 JPS6345013A (en) | 1988-02-26 |
| JPH0366130B2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
1986
- 1986-08-13 JP JP18979086A patent/JPS6345013A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6345013A (en) | 1988-02-26 |
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