JPH0784026B2 - V-belt type automatic transmission weight manufacturing method - Google Patents
V-belt type automatic transmission weight manufacturing methodInfo
- Publication number
- JPH0784026B2 JPH0784026B2 JP60003951A JP395185A JPH0784026B2 JP H0784026 B2 JPH0784026 B2 JP H0784026B2 JP 60003951 A JP60003951 A JP 60003951A JP 395185 A JP395185 A JP 395185A JP H0784026 B2 JPH0784026 B2 JP H0784026B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- resin
- adjusting member
- weight adjusting
- mold
- 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 - Fee Related
Links
- 230000005540 biological transmission Effects 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000011347 resin Substances 0.000 claims description 75
- 229920005989 resin Polymers 0.000 claims description 75
- 230000002093 peripheral effect Effects 0.000 claims description 32
- 238000000465 moulding Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000012783 reinforcing fiber Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 description 5
- -1 polytetrafluoroethylene Polymers 0.000 description 4
- 239000011162 core material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000009958 sewing 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
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は自動二輪車や雪上車などに用いられるＶベルト
式自動変速機用ウェイトの製造方法に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a weight for a V-belt type automatic transmission used in a motorcycle, a snow vehicle, and the like.
Ｖベルト式自動変速機は、駆動側プーリと従動側プーリ
との間にＶベルトを掛け渡したものであり、前記駆動側
プーリおよび従動側プーリは、それぞれ回転軸に対して
固定された固定プーリプレートとこの固定プーリプレー
トに対向してベルト溝を形成し軸線方向に進退自在な可
動プーリプレートとを有している。そして、前記駆動側
プーリの可動プーリプレートを、この可動プーリプレー
トの背面および周壁に係接し駆動側プーリに伴って回転
するウェイトの遠心力で押動することによって、Ｖベル
トのプーリに対する巻掛け径を連続的に変化させるよう
に構成されている。The V-belt type automatic transmission has a V-belt stretched between a driving pulley and a driven pulley, and the driving pulley and the driven pulley are fixed pulleys fixed to a rotary shaft. The plate includes a plate and a movable pulley plate that faces the fixed pulley plate and forms a belt groove, and is movable back and forth in the axial direction. Then, the movable pulley plate of the drive-side pulley is pushed by the centrifugal force of the weight that is in contact with the back surface and the peripheral wall of the movable pulley plate and rotates along with the drive-side pulley, so that the winding diameter of the V-belt around the pulley is increased. Is configured to be continuously changed.
特に、このＶベルト式自動変速機は、無段階でスムーズ
な変速比が得られることや構造が簡単であることなどか
ら、近年、スクータをはじめとしてファミリーバイクや
実用バイク、あるいは雪上車などに広く使用されてい
る。In particular, this V-belt type automatic transmission is widely used not only for scooters but also for family motorcycles, practical motorcycles, snow vehicles, etc. in recent years because of its smooth structure and simple structure. It is used.
ところで、この種の変速機のウェイトは、回転軸の回転
数の変動に応じて、絶えず可動プーリプレートを押動し
てＶベルトの巻掛け径を変化させるものであるから、可
動プーリプレートの背面を円滑に移動し、かつ、可動プ
ーリプレートを摩耗させない必要がある。By the way, since the weight of this type of transmission constantly pushes the movable pulley plate to change the winding diameter of the V-belt according to the fluctuation of the rotation speed of the rotary shaft, the rear surface of the movable pulley plate is changed. It is necessary to move the pulley smoothly and not to wear the movable pulley plate.
そのため、従来、ウェイトは樹脂から円筒状に形成され
たものが一般的であり、このウェイトの外周面に設けら
れた一個のエッジゲートから樹脂を注入する方法により
製造されている。Therefore, conventionally, the weight is generally formed of resin in a cylindrical shape, and is manufactured by a method of injecting the resin from one edge gate provided on the outer peripheral surface of the weight.
しかしながら、このような製造方法では、ウェイトの摺
動および転動面となる外周面にばりが残ることがある。
このため、このばりによって、ウェイトの円滑な摺動お
よび転動が妨げられるという不具合があり、偏摩耗の原
因となっている。However, in such a manufacturing method, burrs may remain on the outer peripheral surface which is the sliding and rolling surface of the weight.
For this reason, there is a problem that the smooth sliding and rolling of the weight is hindered by this flash, which causes uneven wear.
本発明はこのような事情に鑑みなされたもので、円滑に
摺動および転動できるウェイトが製造できるＶベルト式
自動変速機用ウェイトの製造方法を提供するものであ
る。The present invention has been made in view of the above circumstances, and provides a method of manufacturing a weight for a V-belt type automatic transmission that can manufacture a weight that can smoothly slide and roll.
本発明に係るウェイトの製造方法は、円筒状の金属重量
調整部材の外周部に円筒状の樹脂部を、軸方向端部の外
周面となる角部分に面取り面が重量調整部材の外周面と
対応する部位の樹脂層の厚みより小さい面取り寸法をも
って形成されかつ重量調整部材の軸方向両端面まで樹脂
が延在し、この延在部における重量調整部材の軸方向と
なる厚みが重量調整部材の外周面と対応する樹脂層の厚
みより薄くなる構造のキャビティが、重量調整部材の中
空部に突出部を嵌合させてこの重量調整部材を上下方向
に軸線を指向させた状態で保持する下部金型と、前記突
出部の周囲を覆い、前記突出部の側方となる部位に上下
に貫通するようにスプルーが形成されるとともに上面か
ら重量調整部材の軸方向と平行となるように上下方向に
直線的に延びて前記キャビティにおける面取り面となる
部分に開口する先細り状のゲートが形成され前記下部金
型の上面に型締される上部金型とで形成され、上部金型
の上面を壁面の一部として前記スプルーの上端開口から
前記ゲートの上端開口へ水平移方向に延びるランナおよ
び前記スプルーの上端と対向するコールトスラグウェル
とが形成されて前記上部金型の上面に型締めされる上部
金型アダプタとを備えた金型装置に、自己潤滑性を有し
かつ強化繊維が混入された樹脂を注入することにより成
形するものである。The method for manufacturing a weight according to the present invention includes a cylindrical resin portion on the outer peripheral portion of a cylindrical metal weight adjusting member, and a chamfered surface on the outer peripheral surface of the weight adjusting member at the corner portion that becomes the outer peripheral surface of the axial end portion. The resin is formed with a chamfer dimension smaller than the thickness of the resin layer at the corresponding portion, and the resin extends to both axial end surfaces of the weight adjusting member, and the thickness of the extending portion in the axial direction of the weight adjusting member is A cavity having a structure in which the thickness of the resin layer corresponding to the outer peripheral surface is thinner than that of the lower metal that holds the weight adjusting member in a state in which the protrusion is fitted in the hollow portion of the weight adjusting member and the axis of the weight adjusting member is vertically oriented. A mold and a sprue that covers the periphery of the protrusion and vertically penetrates a portion that is lateral to the protrusion and that extends vertically from the top surface to be parallel to the axial direction of the weight adjusting member. Straight ahead A tapered gate that opens in a portion that will be the chamfered surface of the cavity is formed and is formed with an upper mold that is clamped on the upper surface of the lower mold, and the upper surface of the upper mold is used as a part of the wall surface of the sprue. A runner extending in a horizontal transfer direction from an upper end opening to an upper end opening of the gate; and an upper mold adapter formed with a colt slug well facing the upper end of the sprue and clamped on the upper surface of the upper mold. It is molded by injecting a resin having self-lubricating property and containing reinforcing fibers into the mold device.
本発明においては、ゲートはウェイトにおける摺動、転
動面以外の部位に設けられる。また、ゲートから重量調
整部材の外周面に略沿うように樹脂が直線的に流れ、キ
ャビティの下端部で重量調整部材の下端面側へ流れ込む
から、樹脂中に混入した繊維の方向が重量調整部材の外
周面と対応する部位で揃い易くなる。さらに、重量調整
部材が芯材となった状態で樹脂が固化するから、先細り
ゲート付近の樹脂の密度が相対的に高くなることに起因
して樹脂部が成形後に歪もうとするのを重量調整部材が
規制する。In the present invention, the gate is provided at a portion other than the sliding and rolling surfaces of the weight. Further, since the resin linearly flows from the gate substantially along the outer peripheral surface of the weight adjusting member and flows into the lower end surface side of the weight adjusting member at the lower end of the cavity, the direction of the fibers mixed in the resin is in the direction of the weight adjusting member. It becomes easy to align at the portion corresponding to the outer peripheral surface of. Further, since the resin solidifies with the weight adjusting member as the core material, the resin portion tends to distort after molding due to the relatively high density of the resin near the tapered gate. The member regulates.
以下、本発明の一実施例を図により詳細に説明する。第
１図は本発明に係るウェイトの製造方法に用いられる金
型を示す断面図、第２図は第１図のII−II線断面図、第
３図は本発明に係る方法が実施されたウェイトが備えら
れたＶベルト式自動変速機の要部を示す断面図で、これ
らの図において符号１で示すものはスクータ等のユニッ
トスイング式エンジンを示す。このエンジン１は前方に
配設されたエンジン本体２と、後方に配設され減速機を
介して後輪側プーリ軸に接続された図示しない後輪軸
と、前記エンジン本体２の動力をクランク軸３から遠心
クラッチを介して前記後輪側プーリ軸に伝達するＶベル
ト式自動変速機４とが伝動ケース５により一体に保持さ
れ、後輪を懸架する懸架装置の一構成要素として機能し
ている。An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a cross-sectional view showing a mold used for a weight manufacturing method according to the present invention, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG. 3 is a method according to the present invention. FIG. 1 is a cross-sectional view showing a main part of a V-belt type automatic transmission provided with a weight, and a reference numeral 1 in these drawings indicates a unit swing type engine such as a scooter. The engine 1 includes an engine body 2 arranged in the front, a rear wheel shaft (not shown) arranged in the rear and connected to a rear wheel side pulley shaft through a speed reducer, and power of the engine body 2 is supplied to a crankshaft 3 And a V-belt type automatic transmission 4 which transmits to the rear wheel pulley shaft via a centrifugal clutch are integrally held by a transmission case 5 and function as one component of a suspension device for suspending the rear wheel.
前記Ｖベルト式自動変速機４は、クランク軸３に支承さ
れたクランク軸側プーリ６と、前記後輪側プーリ軸にカ
ラーを介して回転自在に支承された後輪側プーリと、こ
れらプーリ間に掛け渡されたＶベルト７などから構成さ
れている。The V-belt type automatic transmission 4 includes a crankshaft side pulley 6 supported by a crankshaft 3, a rear wheel side pulley rotatably supported by the rear wheel side pulley shaft via a collar, and a space between these pulleys. It is composed of a V-belt 7, etc.
前記クランク軸プーリ６は、クランク軸３に固定された
固定プーリプレート6aと、この固定プーリプレート6aに
対向してベルト溝を形成し軸線方向に進退自在な可動プ
ーリプレート6bとを有している。The crankshaft pulley 6 has a fixed pulley plate 6a fixed to the crankshaft 3 and a movable pulley plate 6b facing the fixed pulley plate 6a and forming a belt groove so as to be movable back and forth in the axial direction. .
８はウェイトである。このウェイト８は、第４図に縦断
面を拡大して示すように、鉄や真鍮などの金属材からな
る円筒状の重量調整部材９の外周部を、円筒状に成形さ
れた樹脂部8aで覆って全体が円筒状に形成されている。
前記樹脂部8aは、前記重量調整部材９の外周面側から軸
方向両端面側へ延在し、重量調整部材９の軸方向両端部
に被るように成形されている。そして、このウェイト８
における軸方向端面8bの外周側となる角度には面取り面
8cが形成されている。また、この樹脂部8aは、重量調整
部材９の外周面と対応する部分の厚み（重量調整部材９
の径方向に対する厚み）より、前記軸方向端懸8bと対応
する前記延在部の厚み（重量調整部材９の軸方向に対す
る厚み）の方が薄くなっている。8 is a weight. As shown in FIG. 4 with an enlarged vertical cross section, the weight 8 has a cylindrical weight adjusting member 9 made of a metal material such as iron or brass, and an outer peripheral portion thereof formed by a resin portion 8a formed into a cylindrical shape. The whole is covered with a cylindrical shape.
The resin portion 8a extends from the outer peripheral surface side of the weight adjusting member 9 to both axial end surfaces thereof, and is formed so as to cover both axial end portions of the weight adjusting member 9. And this weight 8
At the angle on the outer peripheral side of the axial end surface 8b in
8c is formed. Further, the resin portion 8a has a thickness corresponding to the outer peripheral surface of the weight adjusting member 9 (the weight adjusting member 9a).
The thickness of the extending portion corresponding to the axial end suspension 8b (the thickness of the weight adjusting member 9 in the axial direction) is smaller than the thickness in the radial direction of.
10は前記可動プーリプレート6bの背面側に位置してクラ
ンク軸３上に固定されたカム部材である。前記ウェイト
８は、これら可動プーリプレート6bとカム部材10との間
に介装され、両部材のカム面によって径方向に摺動かつ
転動自在に挾持されている。前記両カム面は、クランク
軸プーリ６の回転に伴うウェイト８の遠心力で、可動プ
ーリプレート6bを押動しＶベルト７の巻掛け径を変化さ
せるように、外径方向に向かって対向間隔が漸次挟小と
なるように形成されている。Reference numeral 10 denotes a cam member which is located on the back side of the movable pulley plate 6b and is fixed on the crankshaft 3. The weight 8 is interposed between the movable pulley plate 6b and the cam member 10, and is held by the cam surfaces of both members so as to slide and roll in the radial direction. The cam surfaces are opposed to each other in the outer diameter direction so that the centrifugal force of the weight 8 accompanying the rotation of the crankshaft pulley 6 pushes the movable pulley plate 6b to change the winding diameter of the V belt 7. Are formed so that they gradually become smaller.
11は可動プーリプレート6bとカム部材10との間に介装さ
れ、カム部材10に対して可動プーリプレート6bを案内す
るガイド部材である。なお、第３図中鎖線はＶベルト式
自動変速機４のトップ時における状態を示す。A guide member 11 is interposed between the movable pulley plate 6b and the cam member 10 and guides the movable pulley plate 6b to the cam member 10. The chain line in FIG. 3 shows the state of the V-belt type automatic transmission 4 when it is in the top position.
上述したＶベルト式自動変速機のウェイト８を製造する
場合は、まず、金型125および重量調整部材９を加工
し、金型12に形成されたキャビティ13の内側に重量調整
部材９を保持した後に、前記キャビティ13内に樹脂を注
入する。When manufacturing the weight 8 of the V-belt type automatic transmission described above, first, the mold 125 and the weight adjusting member 9 are processed, and the weight adjusting member 9 is held inside the cavity 13 formed in the mold 12. After that, resin is injected into the cavity 13.
この製造方法について詳述すると、まず下部金型12aと
上部金型12bとを加工してこれら部材間に円筒状を呈す
るキャビティ13を形成するとともに、金属材を加工して
重量調整部材９を円筒状に形成する。このとき、前記キ
ャビティ13には、軸方向端部の外周面となる角部分に面
取り面13aを形成しておく。この面取り面13aは、ウェイ
ト８の樹脂部8aにおける重量調整部材９の外周面と対応
する部位の樹脂層の厚みより面取り寸法が小さくなるよ
うに形成する。また、キャビティ13は、樹脂が重量調整
部材９の軸方向端面側まで延在するように形成してお
く。This manufacturing method will be described in detail. First, the lower mold 12a and the upper mold 12b are processed to form a cavity 13 having a cylindrical shape between these members, and a metal material is processed to form the weight adjusting member 9 into a cylinder. Form. At this time, a chamfered surface 13a is formed in the cavity 13 at a corner portion which is an outer peripheral surface of the axial end portion. The chamfered surface 13a is formed such that the chamfered dimension is smaller than the thickness of the resin layer in the portion of the resin portion 8a of the weight 8 corresponding to the outer peripheral surface of the weight adjusting member 9. The cavity 13 is formed so that the resin extends to the axial end surface side of the weight adjusting member 9.
そして、重量調整部材９を下部金型12aの突出部14に挿
嵌してキャビティ13の内側に保持する。ここで、重量調
整部材９は軸線方向の流さがキャビティ13より短く形成
されており、段部15によって外表面がキャビティ13に囲
撓された状態に保持されている。Then, the weight adjusting member 9 is inserted into the protrusion 14 of the lower mold 12a and held inside the cavity 13. Here, the weight adjusting member 9 is formed so that the flow in the axial direction is shorter than that of the cavity 13, and the weight adjusting member 9 is held by the step portion 15 so that the outer surface thereof is surrounded by the cavity 13.
次いで、溶融した樹脂をピンポンイントゲート、本実施
例においては３個のピンポイントゲート16,16・・から
キャビティ13内に注入した後、前記樹脂を冷却して固化
させることによりキャビティ13内にウェイト８を形成す
る。前記ピンポイントゲート16,16・・は、上部金型12b
の内頂面に等間隔に設けられて上記金型12bの上面から
重量調整部材９の軸方向と平行になるように上下方向に
直線的に延びてキャビティ13の前記面取り面13aに開口
し、上記金型12bと上部金型アダプタ17との間に上部金
型12bの上面を壁面の一部として形成されて水平方向ぴ
延びるランナ18に連通されている。すなわち、ウェイト
８は円筒状に形成され、樹脂成形時に上部金型アダプタ
17側となる面取り面8cに３個のピンポイントゲート16,1
6・・が等間隔に設けられている。ランナ18にはスプル
ー19の一端が開口されるとともに、この開口に対向して
低温な樹脂を設けるコールドスラグウェル20が凹設され
ている。前記スプルー19は、上部金型12bにおけるキャ
ビティ形成部分の側方に上部金型12bを上下に貫通する
ように形成されている。したがって、前記溶融した樹脂
は図示しないノズル等によりスプル19からランナ18に供
給され、コールドスラグウェル20で低温な部分が除かれ
た後、ピンポイントゲート16,16・・から注入されてい
る。Then, the molten resin is injected into the cavity 13 from a ping-pong int gate, which is three pinpoint gates 16, 16 ... In this embodiment, and then the resin is cooled and solidified to weight the cavity 13. 8 is formed. The pinpoint gates 16, 16 ... are the upper mold 12b.
On the inner top surface of the cavity 12 at equal intervals, and extends linearly in the vertical direction from the upper surface of the mold 12b to be parallel to the axial direction of the weight adjusting member 9 and opens to the chamfered surface 13a of the cavity 13. An upper surface of the upper mold 12b is formed between the mold 12b and the upper mold adapter 17 as a part of a wall surface, and is connected to a runner 18 extending in the horizontal direction. That is, the weight 8 is formed in a cylindrical shape, and the upper die adapter is used during resin molding.
3 pinpoint gates 16,1 on the chamfered surface 8c on the 17 side
6 ... are provided at equal intervals. One end of the sprue 19 is opened in the runner 18, and a cold slug well 20 is provided to face the opening and to provide a low temperature resin. The sprue 19 is formed on the side of the cavity forming portion of the upper mold 12b so as to vertically penetrate the upper mold 12b. Therefore, the molten resin is supplied from the sprue 19 to the runner 18 by a nozzle or the like (not shown), the low temperature portion is removed by the cold slag well 20, and then injected from the pinpoint gates 16, 16 ...
注入する樹脂は、自らが潤滑性をもった樹脂や、自らが
潤滑性をもたない樹脂に固体潤滑材を充填することによ
って自己潤滑性をもたせた樹脂に、繊維を充填したもの
を使用する。As the resin to be injected, use a resin that has self-lubricating properties or a resin that has self-lubricating properties by filling a solid lubricant into a resin that does not have self-lubricating properties. .
詳述すれば、この場合の樹脂は、ナイロン樹脂，ポリア
セタール樹脂（POM），ポリテトラフルオルエチルン樹
脂（PTEF），ポリブチレンテフタレート樹脂（PBT），
ポリプロピレン樹脂（PP），ポリエチレン樹脂（PE），
もしくはフェノール樹脂，ポリイミド樹脂などとされ
る。充填する繊維としては、ガラス繊維，カーボン繊
維，もしくはアラミド繊維（例えばデュポン社製のケプ
ラー繊維）などとされる。また、固体潤滑材としては、
ポリテトラフルオルエチレン樹脂（PTFE），黒鉛，二硫
化モリブデン（MOS2）などとされる。但し、前記PTFEは
母材がPTFEの場合は使用しない。More specifically, the resin in this case is nylon resin, polyacetal resin (POM), polytetrafluoroethylene resin (PTEF), polybutylene terephthalate resin (PBT),
Polypropylene resin (PP), polyethylene resin (PE),
Alternatively, it may be phenol resin, polyimide resin, or the like. The fiber to be filled may be glass fiber, carbon fiber, or aramid fiber (for example, Kepler fiber manufactured by DuPont). Also, as a solid lubricant,
Polytetrafluoroethylene resin (PTFE), graphite, are molybdenum disulfide (M O S 2). However, the above PTFE is not used when the base material is PTFE.
このように構成されたＶベルト式自動変速機用ウェイト
の製造方法においては、溶融した樹脂をスプルー19から
ランナ18に供給すると、この樹脂はランナ18の先端部に
おいて三等分され、ピンポイントゲート16,16・・を介
してウェイト８の面取り面8cとなる部分からキャビティ
13内に上下方向に沿って直線的に流入し、キャビティ13
内を重量調整部材９の軸方向に沿ってキャビティ下部ま
で流れる。そして、キャビティ13内に充填された樹脂
は、冷却固化されるとキャビティ13に対応した形状に形
成されるため、ウェイト８を製造することができる。In the method for manufacturing the weight for the V-belt type automatic transmission configured as described above, when molten resin is supplied from the sprue 19 to the runner 18, the resin is divided into three equal parts at the tip of the runner 18, and the pinpoint gate From the portion that becomes the chamfered surface 8c of the weight 8 through 16,16 ...
It will flow straight into the inside of the cavity 13 and
It flows through the inside to the lower part of the cavity along the axial direction of the weight adjusting member 9. Then, the resin filled in the cavity 13 is formed into a shape corresponding to the cavity 13 when cooled and solidified, so that the weight 8 can be manufactured.
したがって、樹脂をウェイト８の面取り面8cから軸線方
向に注入することによって製造したから、ウェイト８の
摺動および転動面となる外周面軸方向両端面にばりが残
るようなことがない。Therefore, since the resin is manufactured by pouring the resin from the chamfered surface 8c of the weight 8 in the axial direction, burrs do not remain on the outer circumferential surface axial both end surfaces which are the sliding and rolling surfaces of the weight 8.
樹脂成形図には、面取り面8cがピンポイントゲート16と
は反対側の軸端部にも形成されている関係から、キャビ
ティ13内を下方へ向けて流れる樹脂はこの面取り面8cに
よって流れ向きが円滑に変えられ、重量調整部材９の下
端面側へも流入する。すなわち、重量調整部材９の外周
面と対応する部分の寿異は最下部でも流れが止まること
がなく、流れ向きが乱さない状態が保たれる。したがっ
て、樹脂が重量調整縫材９の外周面に沿って軸方向と平
行になるように直線的に流れることと、この樹脂の流れ
方向が重量調整部材９の外周面と対応する位置の全域に
わたって略一定となることから、樹脂中に混入した繊維
の方向が重量調整部材９の外周面と対応する部位で揃い
易くなる。このため、固化後の樹脂部8aの歪みが少なく
なるから、繊維を混入させても真円度の高いウェイト８
を形成することができる。In the resin molding diagram, since the chamfered surface 8c is also formed at the shaft end opposite to the pinpoint gate 16, the resin flowing downward in the cavity 13 has a flow direction by the chamfered surface 8c. It can be changed smoothly and flows into the lower end surface side of the weight adjusting member 9. That is, even in the lowermost part of the life adjusting portion of the weight adjusting member 9 corresponding to the outer peripheral surface, the flow does not stop and the flow direction is not disturbed. Therefore, the resin linearly flows along the outer peripheral surface of the weight adjusting sewing material 9 so as to be parallel to the axial direction, and the resin flows over the entire area of the position corresponding to the outer peripheral surface of the weight adjusting member 9. Since it is substantially constant, the direction of the fibers mixed in the resin is easily aligned at the portion corresponding to the outer peripheral surface of the weight adjusting member 9. Therefore, distortion of the resin portion 8a after solidification is reduced, and therefore the weight 8 having a high roundness even if fibers are mixed therein is used.
Can be formed.
さらに、ピンポイントゲート16からキャビティ13に樹脂
を注入すると樹脂の密度がゲート付近で相対的に高くな
り、固化後に歪みが生じることがあるが、重量調整部材
９が芯材となった状態で樹脂部8aが固化するから、この
樹脂部8aが歪むのを重量調整部材が規制することにな
る。このため、真円度の高いウェイト８が形成される。
その上、樹脂部8aにおける重量調整部材９の外周面と対
応する部位より重量調整部材９の軸端面と対応する延在
部を薄く形成したもので、この延在部が固化した後に歪
んだとしても真円度が著しく低下することはない。Further, when the resin is injected from the pinpoint gate 16 into the cavity 13, the density of the resin becomes relatively high near the gate and distortion may occur after solidification. However, when the weight adjusting member 9 serves as the core material, Since the portion 8a is solidified, the weight adjusting member regulates the distortion of the resin portion 8a. Therefore, the weight 8 having a high roundness is formed.
In addition, the extending portion corresponding to the shaft end surface of the weight adjusting member 9 is formed thinner than the portion of the resin portion 8a corresponding to the outer peripheral surface of the weight adjusting member 9. If the extending portion is distorted after being solidified, However, the roundness does not significantly decrease.
なお、上記実施例ではピンポイントゲート16を３箇所に
設けた例について説明したが、ピンポイントゲートは一
個であっても同様な作用効果を得ることができる。Although the pinpoint gates 16 are provided at three locations in the above embodiment, similar operational effects can be obtained even if the number of pinpoint gates is one.
以上説明したように本発明によれば、円筒状の金属重量
調整部材の外周部に円筒状の樹脂部を、軸方向端部を外
周側となる角部分に面取り面が重量調整部材の外周面と
対応する部位の樹脂層の厚みより小さい面取り寸法をも
って形成されかつ重量部材の軸方向となる厚みが重量調
整部材の外周面と対応する樹脂層の厚みより薄くなる構
造のキャビティが、重量調整部材の中空部に突出部を嵌
合させてこの重量調整部材を上下方向に軸線を指向させ
た状態で保持する下部金型と、前記突出部の周囲を覆
い、前記突出部の側方となる部位に上下に貫通するよう
にスプルーが形成されるとともに上面から重量調整部材
の軸方向と平行となるように上下方向に直線的に延びて
前記キャビティにおける面取り面となる部分に開口する
先細り状のゲートが形成され前記金型の上面に型締され
る上部金型とで形成され、上部金型の上面を壁面の一部
として前記スプルーの上端開口から前記ゲートへの上端
開口へ水平方向に延びるランナおよび前記スプルーの上
端と対向するコールドスラグウェルとが形成されて前記
上部金型の上面に型締され得る上部金型アダプタとを備
えた金属装置に、自己潤滑性を有しかつ強化繊維が混入
された樹脂を注入することにより整形するため、ウェイ
トの摺動、転動面となる外周面軸方向端面にばりが残る
のを防止することができると共に、これら両面を、自己
潤滑性を有する樹脂によって形成することができる。As described above, according to the present invention, the cylindrical resin portion is provided on the outer peripheral portion of the cylindrical metal weight adjusting member, and the chamfered surface is provided on the outer peripheral surface of the weight adjusting member at the corner portion having the axial end portion on the outer peripheral side. A cavity having a chamfered dimension smaller than the thickness of the resin layer in a portion corresponding to the cavity and having a structure in which the thickness of the weight member in the axial direction is thinner than the thickness of the resin layer corresponding to the outer peripheral surface of the weight adjustment member is a weight adjustment member. A lower die for holding the weight adjusting member in a state where the weight adjusting member is oriented in the vertical direction by fitting the protruding portion into the hollow portion of, and a portion that covers the periphery of the protruding portion and is lateral to the protruding portion A sprue is formed so as to penetrate vertically in the upper and lower portions, and a tapered gate that is linearly extended in the vertical direction from the upper surface so as to be parallel to the axial direction of the weight adjusting member and opens in a portion to be the chamfered surface of the cavity. But A runner that is formed of a top mold and is clamped to the top surface of the mold, and that extends horizontally from the top opening of the sprue to the top opening to the gate with the top surface of the top mold as part of the wall surface. A metal device having an upper mold adapter that is formed with an upper end of the sprue and a cold slug well facing the upper mold and can be clamped on the upper surface of the upper mold is mixed with self-lubricating and reinforcing fibers. Since it is shaped by injecting a resin, it is possible to prevent burrs from remaining on the axial end faces of the outer peripheral surface, which are the sliding and rolling surfaces of the weight. Can be formed.
このため、ウェイトの摺動、転動面がばりのない円滑な
面となり、しかも、これらの両面は滑り易くかつ剛性が
高い材料によって形成されるので、ウェイトの摺動およ
び転動を円滑にすることができるとともに強固に形成で
きる。その上、重量調整部材が樹脂部より軸方向外方へ
突出することがない。そのため、偏摩耗が低減できるか
ら、寿命の延長化も期待できる。For this reason, the sliding and rolling surfaces of the weight become smooth surfaces without burrs, and since both surfaces are made of a material that is slippery and has high rigidity, the sliding and rolling of the weight is smooth. It can be formed firmly. Moreover, the weight adjusting member does not project outward in the axial direction from the resin portion. Therefore, uneven wear can be reduced, so that the life can be extended.
また、先細り状のゲートを介してキャビティに樹脂を注
入するから、ウェイトを成形した後にばりが残るような
こともない。Further, since the resin is injected into the cavity through the tapered gate, burrs do not remain after molding the weight.
さらに、ゲートから重量調整部材の外周面に略沿うよう
に樹脂が直線的に流れ、キャビティの下端部で重量調整
部材の下端面側へ流れ込むから、樹脂中に混入した繊維
の方向が重量調整部材の外周面と対応する部位で揃い易
くなる。このため、強度を高めるために樹脂に繊維を混
入させても樹脂部の歪みが少なく、真円度の高いウェイ
トが得られる。Further, since the resin linearly flows from the gate substantially along the outer peripheral surface of the weight adjusting member and flows into the lower end surface side of the weight adjusting member at the lower end of the cavity, the direction of the fibers mixed in the resin is in the direction of the weight adjusting member. It becomes easy to align at the portion corresponding to the outer peripheral surface of. Therefore, even if fibers are mixed in the resin to increase the strength, distortion of the resin portion is small and a weight having a high roundness can be obtained.
さらにまた、重量調整部材が芯材となった状態で樹脂部
が固化するから、先細り状ゲート付近で樹脂の密度が相
対的に高くなることに起因して樹脂部が歪むのを重量調
整部材が規制し、真円度の高いウェイトが形成される。
その上、樹脂部における重量調整部材の外周面と対応す
る位置より重量調整部材の軸端面と対応する延在部を薄
く形成したもので、この延在部が固化した後に歪んたと
しても真円度が著しく低下することはない。Furthermore, since the resin portion solidifies with the weight adjusting member serving as the core material, the weight adjusting member prevents the resin portion from being distorted due to the relatively high density of the resin in the vicinity of the tapered gate. It regulates and a weight with high roundness is formed.
In addition, the extension portion corresponding to the shaft end surface of the weight adjusting member is formed thinner than the position corresponding to the outer peripheral surface of the weight adjusting member in the resin portion, and even if the extension portion is solidified and is distorted, it is a perfect circle. The degree does not decrease significantly.
加えて、キャビティ側方のスプルーから樹脂を供給する
手法を採っているため、金型装置が上下方向に対してコ
ンパクトになり、コールドスラグウェルに低温の樹脂を
流入させて成形を行うことができるので、高品質なウェ
イトを製造することができる。また、スプルーからゲー
トへ樹脂を導くランナを、上部金型の上面を壁面の一部
として形成したので、金型構造を簡素化することができ
うという利点もある。In addition, since the resin is supplied from the sprue on the side of the cavity, the mold device becomes compact in the vertical direction, and cold resin can be poured into the cold slag well to perform molding. Therefore, a high quality weight can be manufactured. Further, since the runner for guiding the resin from the sprue to the gate is formed by using the upper surface of the upper mold as a part of the wall surface, there is an advantage that the mold structure can be simplified.
第１図は本発明に係るウェイトの製造方法に用いられる
金型を示す断面図、第２図は第１のII−II線断面図、第
３図は本発明に係る方法が実施されたウェイトが備えら
れたＶベルト式自動変速機の要部を示す断面図、第４図
はウェイトを拡大して示す縦断面図である。 ４……Ｖベルト式自動変速機、6a……固化プーリプレー
ト、6b……可動プーリプレート、８……ウェイト、8a…
…樹脂部、９……重量調整部材、10……カム部材、12a
……下部金型、12b……上部金型、13……キャビティ、1
3a……面取り面、16……ピンポイントゲート、17……上
部金型アダプタ。FIG. 1 is a sectional view showing a mold used in a method for manufacturing a weight according to the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a weight on which the method according to the present invention has been carried out. FIG. 4 is a sectional view showing an essential part of a V-belt type automatic transmission provided with, and FIG. 4 is an enlarged vertical sectional view showing a weight. 4 ... V-belt type automatic transmission, 6a ... solidified pulley plate, 6b ... movable pulley plate, 8 ... weight, 8a ...
… Resin part, 9 …… Weight adjustment member, 10 …… Cam member, 12a
...... Lower mold, 12b …… Upper mold, 13 …… Cavity, 1
3a: chamfered surface, 16: pinpoint gate, 17: upper mold adapter.
Claims (1)
形成する可動プーリプレートとカム部材との間に介装さ
れたウェイトを備えたＶベルト式自動変速機の前記ウェ
イトの製造方法であって、このウェイトを、円筒状の金
属製重量調整部材の外周部に樹脂部を円筒状に成形する
ことによって形成してなり、この樹脂部を、軸方向端部
の外周側となる角部分に面取り面が重量調整部材の外周
面と対応する部位の樹脂層の厚みより小さい面取り寸法
をもって形成されかつ重量調整部材の軸方向両端面まで
樹脂が延在し、この延在部における重量調整部材の軸方
向となる厚みが重量調整部材の外周面と対応する樹脂層
の厚みより薄くなる構造のキャビティが、重量調整部材
の中空部に突出部を嵌合させてこの重量調整部材を上下
方向に軸線を指向させた状態で保持する下部金型と、前
記突出部の周囲を覆い、前記突出部の側方となる部位に
上下に貫通するようにスプルーが形成されるとともに上
面から重量調整部材の軸方向と平行となるように上下方
向に直線的に延びて前記キャビティにおける面取り面と
なる部分に開口する先細り状のゲートが形成され前記下
部金型の上面に型締めされる上部金型とで形成され、上
部金型の上面を壁面の一部として前記スプルーの上端開
口から前記ゲートの上端開口へ水平方向に延びるランナ
および前記スプルーの上端と対向するコールドスラグウ
ェルとが形成されて前記上部金型の上面に型締めされる
上部金型アダプタとを備えた金型装置に、自己潤滑性を
有しかつ強化繊維が混入された樹脂を注入することによ
り成形することを特徴するＶベルト式自動変速機用ウェ
イトの製造方法。1. A method of manufacturing the weight of a V-belt type automatic transmission, comprising a weight interposed between a movable pulley plate that forms a belt groove facing a solid pulley plate and a cam member. , This weight is formed by molding a resin portion into a cylindrical shape on the outer peripheral portion of a cylindrical metal weight adjusting member, and the resin portion is chamfered to a corner portion on the outer peripheral side of the axial end portion. The surface is formed with a chamfering dimension smaller than the thickness of the resin layer in the portion corresponding to the outer peripheral surface of the weight adjusting member, and the resin extends to both axial end surfaces of the weight adjusting member. The cavity having a structure in which the thickness in the direction becomes thinner than the thickness of the resin layer corresponding to the outer peripheral surface of the weight adjusting member, the protrusion is fitted in the hollow portion of the weight adjusting member, and the axis of the weight adjusting member is vertically adjusted. Orientation A lower mold that holds the protruding portion, and a sprue that covers the periphery of the protruding portion and vertically penetrates into a side portion of the protruding portion, and from the upper surface to the axial direction of the weight adjusting member. A vertically extending gate extending in a vertical direction so as to be parallel to the chamfered surface of the cavity and having a tapered gate formed on the upper surface of the lower mold; An upper surface of the upper mold is formed with a runner horizontally extending from the upper end opening of the sprue to the upper end opening of the gate with the upper surface of the upper mold as a part of a wall surface and a cold slug well facing the upper end of the sprue. A V-belt formed by injecting a self-lubricating resin mixed with reinforcing fibers into a mold device provided with an upper mold adapter to be clamped in the mold. Manufacturing method for the automatic transmission weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60003951A JPH0784026B2 (en) | 1985-01-16 | 1985-01-16 | V-belt type automatic transmission weight manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60003951A JPH0784026B2 (en) | 1985-01-16 | 1985-01-16 | V-belt type automatic transmission weight manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61163821A JPS61163821A (en) | 1986-07-24 |
| JPH0784026B2 true JPH0784026B2 (en) | 1995-09-13 |
Family
ID=11571414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60003951A Expired - Fee Related JPH0784026B2 (en) | 1985-01-16 | 1985-01-16 | V-belt type automatic transmission weight manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0784026B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0324349A (en) * | 1989-06-19 | 1991-02-01 | Bando Chem Ind Ltd | Weight roller |
| US6013219A (en) * | 1995-10-20 | 2000-01-11 | Degrenier; Michael H. | Method and apparatus of injection molding a cover with a hole |
| JP5909465B2 (en) * | 2013-06-24 | 2016-04-26 | 株式会社コジマプラスチックス | Injection mold and method for producing resin molded product |
| JP6657274B2 (en) | 2018-02-07 | 2020-03-04 | バンドー化学株式会社 | Weight roller, method for manufacturing the same, and mold used for manufacturing the weight roller |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6023415B2 (en) * | 1979-04-24 | 1985-06-07 | 世紀工業株式会社 | Magnetic tape guide and its manufacturing method |
| JPS5944979B2 (en) * | 1980-05-31 | 1984-11-02 | 株式会社田村電機製作所 | injection mold |
| JPS5842854A (en) * | 1981-09-07 | 1983-03-12 | Honda Motor Co Ltd | Belt type automatic speed change gear |
| JPS5871138A (en) * | 1981-10-26 | 1983-04-27 | Toshiba Corp | Mold for injection molding |
| JPS59106942A (en) * | 1982-12-10 | 1984-06-20 | Ricoh Co Ltd | Molding method |
| JPS59143622A (en) * | 1983-02-05 | 1984-08-17 | Citizen Watch Co Ltd | Manufacture of molded small sized cylindrical parts made of resin |
| JPS59184621U (en) * | 1983-05-25 | 1984-12-08 | 矢崎化工株式会社 | Molding mold with tunnel gate |
| JP3382399B2 (en) * | 1994-12-26 | 2003-03-04 | キヤノン株式会社 | Process cartridge and image forming apparatus |
-
1985
- 1985-01-16 JP JP60003951A patent/JPH0784026B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61163821A (en) | 1986-07-24 |
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