JPH03277859A - Resin pulley and manufacture thereof - Google Patents
Resin pulley and manufacture thereofInfo
- Publication number
- JPH03277859A JPH03277859A JP7849990A JP7849990A JPH03277859A JP H03277859 A JPH03277859 A JP H03277859A JP 7849990 A JP7849990 A JP 7849990A JP 7849990 A JP7849990 A JP 7849990A JP H03277859 A JPH03277859 A JP H03277859A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- pulley
- wing
- axial direction
- resin pulley
- 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
- 239000011347 resin Substances 0.000 title claims abstract description 48
- 229920005989 resin Polymers 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 abstract description 12
- 230000037431 insertion Effects 0.000 abstract 3
- 238000003780 insertion Methods 0.000 abstract 3
- 238000000465 moulding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010008 shearing 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
- B29C45/14—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
- B29C45/1459—Coating annular articles
-
- 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
- B29C45/14311—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 using means for bonding the coating to the articles
Abstract
Description
〔産業上の利用分野〕
本発明は、自動車や汎用機器等における回転転・達手段
として用いられ、内周に回転軸との固定部となるインサ
ート金具を備えた樹脂プーリ、およびこの樹脂プーリの
製造方法に関する。
〔従来の技術Ｊ
従来から、第５図に示すように、樹脂製プーリ本体（１
０１）の内周部に、図示しない回転軸との固定部となる
筒状のインサート金具（１０２）が一体に設けられた樹
脂プーリ（１００）が各種機器の回転伝達部に用いられ
ている。
上記インサート金具（１０２）の外周面には、プーリ本
体（１０１）との相対的な回転を防止するため。
た仁えば第６図［Ａ］ （Ｂ］ ［Ｃ］に例示した
ようなキー溝（１０３） 、ローレット（１０４） 、
あるいは歯車状凹凸（１０５）などの、各種の回り止め
手段が施されている。
〔発明が解決しようとする課題〕
しかし、上記従来の構成によると、プーリ本体（１０１
）に比較的溶融粘度の高い樹脂材料を用いた場合、第７
図［Ａ］ ［Ｂ］ ［Ｃ］に示すように、上記キス
溝（１０３） 、ローレット（１０４） 、歯車状凹凸
（１０５）などによる溝部に樹脂材料（ｌｏｌａ）が完
全に回り込んだ賦形状態とならず、この状態で樹脂材料
（１０１ａ）が硬化してしまうと、計算上の限界トルク
を満足できないことがあった。
本発明は、このような点に鑑み、伝達トルクに対する樹
脂製プーリ本体とインサート金具の結合部における結合
強度向上を課題としてなされたものである。[Industrial Field of Application] The present invention relates to a resin pulley that is used as a rotation/transfer means in automobiles, general-purpose equipment, etc., and has an insert fitting on the inner periphery that serves as a fixing part to a rotating shaft, and a resin pulley of this resin pulley. Regarding the manufacturing method. [Prior art J] Conventionally, as shown in Fig. 5, a resin pulley body (1
A resin pulley (100) integrally provided with a cylindrical insert fitting (102) that serves as a fixed part to a rotating shaft (not shown) is used as a rotation transmitting part of various devices. The outer circumferential surface of the insert fitting (102) is provided to prevent relative rotation with the pulley main body (101). For example, a keyway (103), a knurling (104), as illustrated in Fig. 6 [A] (B) [C],
Alternatively, various anti-rotation means such as gear-shaped unevenness (105) are provided. [Problems to be Solved by the Invention] However, according to the above conventional configuration, the pulley body (101
), when a resin material with relatively high melt viscosity is used, the seventh
As shown in Figures [A], [B], and [C], the resin material (lola) completely wraps around the grooves formed by the kiss groove (103), knurling (104), gear-shaped unevenness (105), etc. If this state is not reached and the resin material (101a) is cured in this state, the calculated limit torque may not be satisfied. In view of these points, the present invention has been made with the object of improving the bonding strength at the bonding portion between the resin pulley body and the insert metal fitting with respect to the transmitted torque.
上記課題を解決するため、本発明は、樹脂製プーリ本体
の内周部に筒状のインサート金具が一体に設けられ、こ
のインサート金具の外周面に、軸方向に延びるとともに
軸方向中途部が膨らんだ略流線形断面の複数の翼状突起
を設けた樹脂プーリを提供し、また、この樹脂プーリを
得るため、内周部に上記インサート金具を挿入したキャ
ビティに、上記各翼状突起と対応した位相で配された複
数のゲートから成形用樹脂材料を注入することを特徴と
する樹脂プーリの製造方法を提供するものである。
【作 用Ｊ
本発明の樹脂プーリによると、インサート金具の外周面
に突設した翼状突起が流線形断面をなしていてその軸方
向両端の肉厚が小さいことから、各翼状突起間における
樹脂材料（樹脂製プーリ本体）の剪断面積が大きくなっ
て、伝達トルクに対する強度が向上するとともに、この
翼状突起の外側面は湾曲していることから、樹脂製プー
リ本体に対する軸方向への抜は止め力も大きなものとな
る。
また、本発明の製造方法によると、キャビティ内に固定
された上記インサート金具の外周に、上記各翼状突起と
対応した位相で配された複数のゲートから注入された成
形用樹脂材料は、各翼状突起間を忙方向に流動する。こ
のとき、上記各翼状突起は流線形断面をなすことから、
樹脂材料の流動抵抗が小さ（、各翼状突起周囲への樹脂
材料の賦形がきわめて良好に行なわれる。
〔実 施 例〕
以下、本発明を、図示の一実施例を参照しながら説明す
る。
まず、第１図に示す本実施例の樹脂プーリ（１）におい
て、（２）は樹脂製のプーリ本体、（３）はこのプーリ
本体（２）の内周に一体に設けられたインサート金具で
ある。
上記インサート金具（３）は、内周に軸孔（５）を有す
る筒状部（４）の外周面（６）に、軸方向に延びるとと
もに軸方向中途部が膨らんだ略流線形断面の複数の翼状
突起（７）を周方向等配状に設けたもので、各翼状突起
（７）間に外周のプーリ本体（２）を構成する樹脂材料
が咬みあった状態となっている。
次に、第２図は、上記構成の樹脂プーリ（１）を製造す
る方法を示すもので、（１１）は、内部に樹脂プーリ（
１）を成形するためのキャビティ（１２）と、該キャビ
ティ（１２）内に溶融樹脂材料（Ｐ）を注入するための
ランチ（１３）およびゲート（１４）が形成された金型
である。キャビティ（１２）の内周部には、上記第１図
に示したインサート金具（３）が挿入されて、間怠的に
位置決め固定される。また、上記金型（１１）は多点ゲ
ート式であって、上記ゲート（１４）は、インサート金
具（３）の各翼状突起（７）と対応した位相で周方向等
配状に形成されている。
この金型（１１）を用いて成形を行なった場合、第３図
に示すように、各ゲート（１４）からキャビティ（１２
）内に注入された溶融樹脂材料（Ｐ）は、各ゲート（１
４）と対向して存在する翼状突起（７）の両側空間を経
由して流れ、キャビティ（１２）内金体へ充填される。
ここで上記翼状突起（７）は略流線形断面をなすことか
ら、湾曲したその両側面（７ａ） （７ｂ）に沿って、
上記溶融樹脂材料（Ｐ）が各翼状突起（７）の間をきわ
めて円滑に流動し、各翼状突起（７）周囲への樹脂材料
（Ｐ）の賦形がきわめて良好に行なわれる。
このため、溶融樹脂材料（Ｐ）が硬化した樹脂製プーリ
本体（２）と、インサート金具（３）の各翼状突起（７
）は互いに強固に咬み合った状態となり、しかも、翼状
突起（７）はその軸方向両端に向けて漸次肉厚が細る形
状であることから、第４図に示すように、翼状突起（７
） と同幅のスプライン状突起（７゛）を設けた場合と
比較すると、同図中多数の点を付した部分、すなわち各
翼状突起（７）の間の咬合部分における樹脂材料の剪断
面積（Ｓ、）（Ｓ２）が図中斜線を付した面積だけ大き
くなり、眼界トルクを向上できる。また、スプライン状
突起（７゛）のように軸方向に直線的に延びるものでは
ないことから、プーリ本体（２）Ｉに対する軸方向への
固定力も大きいものとなる。
なお、本発明は図示の一実施例に限定されるものではな
く、翼状突起（７）の大きさや数、その両側面（７ａ）
（７ｂｌの湾曲度等は任意であり、また、ゲート（１
４）の数は翼状突起（７）の数によって決まるものであ
る。
【発明の効果】
以上、本発明の樹脂プーリによると、インサート金具の
外周面に突設した翼状突起が流線形断面をなしているこ
とから、各翼状突起間における剪断面積が大きくなって
、プーリ本体との結合部の伝達トルクに対する強度およ
びプーリ本体に対する軸方向への抜は止め力を向上させ
ることができ、また、その製造において、溶融樹脂材料
を上記各翼状突起と対応した位相で配された複数のゲー
トから注入することにより、翼状突起周囲に樹脂材料が
良好に賦形されるので、上記限界トルクおよび抜は止め
力の向上を確実に達成することができる。In order to solve the above problems, the present invention includes a cylindrical insert fitting that is integrally provided on the inner peripheral part of the resin pulley main body, and a cylindrical insert fitting that extends in the axial direction and has a bulging part in the axial direction on the outer circumferential surface of the insert fitting. A resin pulley is provided with a plurality of wing-like protrusions having a substantially streamlined cross section, and in order to obtain this resin pulley, the above-mentioned insert metal fittings are inserted into a cavity in the inner periphery, and a plurality of wing-like protrusions are inserted into the cavity in a phase corresponding to each of the above-mentioned wing-like protrusions. The present invention provides a method for manufacturing a resin pulley, characterized in that a molding resin material is injected through a plurality of arranged gates. [Function J] According to the resin pulley of the present invention, the wing-like projections protruding from the outer peripheral surface of the insert metal fitting have a streamlined cross section and the wall thickness at both ends in the axial direction is small, so that the resin material between each wing-like projection is small. The shearing area of the resin pulley body is increased, which improves its strength against transmitted torque, and the curved outer surface of the wing-shaped protrusion also reduces the force that prevents the resin pulley body from being pulled out in the axial direction. It becomes something big. Further, according to the manufacturing method of the present invention, the molding resin material is injected into the outer periphery of the insert fixed in the cavity through the plurality of gates arranged in a phase corresponding to each of the wing-shaped projections. Flows between the protrusions in the busy direction. At this time, since each of the wing-like processes described above has a streamlined cross section,
The flow resistance of the resin material is small (and the resin material can be shaped very well around each wing-like projection). [Example] The present invention will be described below with reference to an example shown in the drawings. First, in the resin pulley (1) of this embodiment shown in Fig. 1, (2) is a resin pulley body, and (3) is an insert metal fitting integrally provided on the inner periphery of this pulley body (2). The metal insert (3) has a substantially streamlined cross section extending in the axial direction and having a bulged midway portion in the axial direction on the outer circumferential surface (6) of the cylindrical portion (4) having an axial hole (5) in the inner circumference. A plurality of wing-like protrusions (7) are provided equidistantly in the circumferential direction, and the resin material constituting the pulley body (2) on the outer periphery is interlocked between each of the wing-like protrusions (7). Next, FIG. 2 shows a method for manufacturing the resin pulley (1) having the above structure, and (11) has a resin pulley (11) inside.
This is a mold in which a cavity (12) for molding 1), a launch (13) and a gate (14) for injecting a molten resin material (P) into the cavity (12) are formed. The insert metal fitting (3) shown in FIG. 1 is inserted into the inner circumferential portion of the cavity (12) and is intermittently positioned and fixed. Further, the mold (11) is of a multi-point gate type, and the gates (14) are formed equidistantly in the circumferential direction in a phase corresponding to each of the wing-like protrusions (7) of the metal insert (3). There is. When molding is performed using this mold (11), as shown in FIG.
) The molten resin material (P) injected into each gate (1
4) and flows through the space on both sides of the wing-like projection (7), which is located opposite to the wing-like projection (7), and is filled into the metal body inside the cavity (12). Here, since the wing-like process (7) has a substantially streamlined cross section, along its curved both sides (7a) (7b),
The molten resin material (P) flows extremely smoothly between the wing-shaped protrusions (7), and the resin material (P) is shaped around each wing-shaped protrusion (7) very well. For this reason, the resin pulley body (2) in which the molten resin material (P) has been hardened and each wing-like protrusion (7) of the insert fitting (3) are
) are firmly interlocked with each other, and the pterygoid process (7) has a shape in which the wall thickness gradually decreases toward both ends in the axial direction.
), the shear area of the resin material at the part marked with many dots in the same figure, that is, the occlusal part between each wing-like process (7). S, ) (S2) becomes larger by the shaded area in the figure, and the ocular torque can be improved. Furthermore, since it does not extend linearly in the axial direction like the spline-like protrusion (7'), the fixing force in the axial direction to the pulley body (2) I is also large. Note that the present invention is not limited to the illustrated embodiment, and the size and number of the wing-like projections (7), and both sides (7a) thereof
(The degree of curvature of 7bl is arbitrary, and the gate (1
The number of 4) is determined by the number of pterygoid processes (7). Effects of the Invention As described above, according to the resin pulley of the present invention, since the wing-like protrusions protruding from the outer circumferential surface of the insert metal fitting have a streamlined cross section, the shear area between each wing-like protrusion becomes large, and the pulley It is possible to improve the strength of the connecting part with the main body against the transmitted torque and the force to prevent the pulley from being pulled out in the axial direction. By injecting the resin material through a plurality of gates, the resin material is well shaped around the wing-like projections, so that the above-mentioned limit torque and removal stopping force can be reliably improved.
第１図は本発明樹脂プーリの一実施例を示す一部切断し
た斜視図、第２図は本発明製造方法の一実施例を示す説
明図、第３図は溶融樹脂材料の流れを示す説明図、第４
図は作用説明図、第５図は従来構造の樹脂プーリの一例
を示す斜視図、第６図［Ａ］ ［Ｂ］ ［Ｃ］は同
従来構造におけるインサート金具の各態様を示す斜視図
、第７図［Ａ］［Ｂ］ ［Ｃ］は同従来構造における
樹脂の賦形状態を示す説明図である。Fig. 1 is a partially cutaway perspective view showing an embodiment of the resin pulley of the present invention, Fig. 2 is an explanatory diagram showing an embodiment of the manufacturing method of the present invention, and Fig. 3 is an explanatory diagram showing the flow of molten resin material. Figure, 4th
5 is a perspective view showing an example of a resin pulley with a conventional structure. FIGS. 7 [A], [B], and [C] are explanatory diagrams showing the shaped state of the resin in the same conventional structure.
Claims (1)
ト金具（３）が一体に設けられ、このインサート金具（
３）の外周面（６）に、軸方向に延びるとともに軸方向
中途部が膨らんだ略流線形断面の複数の翼状突起（７）
を設けたことを特徴とする樹脂プーリ。 ２、内周部に上記インサート金具（３）を挿入したキャ
ビティ（１２）に、上記各翼状突起（７）と対応した位
相で配された複数のゲート（１４）から溶融樹脂材料（
Ｐ）を注入することを特徴とする請求項１記載の樹脂プ
ーリの製造方法。[Claims] 1. A cylindrical insert fitting (3) is integrally provided on the inner circumference of the resin pulley body (2), and this insert fitting (
A plurality of wing-like projections (7) on the outer peripheral surface (6) of 3) that extend in the axial direction and have a substantially streamlined cross section with a swollen midway portion in the axial direction.
A resin pulley characterized by being provided with. 2. Molten resin material (
2. The method for manufacturing a resin pulley according to claim 1, further comprising injecting P).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7849990A JPH03277859A (en) | 1990-03-27 | 1990-03-27 | Resin pulley and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7849990A JPH03277859A (en) | 1990-03-27 | 1990-03-27 | Resin pulley and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03277859A true JPH03277859A (en) | 1991-12-09 |
Family
ID=13663657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7849990A Pending JPH03277859A (en) | 1990-03-27 | 1990-03-27 | Resin pulley and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03277859A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6993993B2 (en) * | 2001-05-29 | 2006-02-07 | Matsushita Electric Industrial Co., Ltd. | Sheet metal outsert-molded gear |
| JP2012172632A (en) * | 2011-02-23 | 2012-09-10 | Denso Corp | Glow plug control device, and method for manufacturing the same |
| DE102004062222B4 (en) * | 2003-12-25 | 2015-04-30 | Sanden Corp. | pulley |
| DE102008033680B4 (en) * | 2007-09-12 | 2016-09-01 | Denso Corporation | Alternator with pulley for a vehicle |
| JP2017053550A (en) * | 2015-09-10 | 2017-03-16 | 日本特殊陶業株式会社 | Ceramic heater and glow plug |
-
1990
- 1990-03-27 JP JP7849990A patent/JPH03277859A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6993993B2 (en) * | 2001-05-29 | 2006-02-07 | Matsushita Electric Industrial Co., Ltd. | Sheet metal outsert-molded gear |
| DE102004062222B4 (en) * | 2003-12-25 | 2015-04-30 | Sanden Corp. | pulley |
| DE102008033680B4 (en) * | 2007-09-12 | 2016-09-01 | Denso Corporation | Alternator with pulley for a vehicle |
| JP2012172632A (en) * | 2011-02-23 | 2012-09-10 | Denso Corp | Glow plug control device, and method for manufacturing the same |
| JP2017053550A (en) * | 2015-09-10 | 2017-03-16 | 日本特殊陶業株式会社 | Ceramic heater and glow plug |
| US10041674B2 (en) | 2015-09-10 | 2018-08-07 | Ngk Spark Plug Co., Ltd. | Ceramic heater and glow plug |
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