JPH10318252A - Composite rotary body and manufacture thereof - Google Patents
Composite rotary body and manufacture thereofInfo
- Publication number
- JPH10318252A JPH10318252A JP12907797A JP12907797A JPH10318252A JP H10318252 A JPH10318252 A JP H10318252A JP 12907797 A JP12907797 A JP 12907797A JP 12907797 A JP12907797 A JP 12907797A JP H10318252 A JPH10318252 A JP H10318252A
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- outer layer
- rotating body
- outer peripheral
- resin
- 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
Landscapes
- Sliding-Contact Bearings (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は金属軸芯と熱可塑性
樹脂を一体化した複合回転体に関し、更に詳しくは、二
次加工処理をせずに真円性や表面性に優れた金属軸心と
熱可塑性樹脂を一体化した複合回転体及びその製法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite rotating body in which a metal shaft core and a thermoplastic resin are integrated, and more particularly, to a metal shaft center having excellent roundness and surface properties without secondary processing. The present invention relates to a composite rotating body in which a resin and a thermoplastic resin are integrated and a method for producing the same.
【０００２】[0002]
【従来の技術】例えば自動車エンジンのバルブを駆動す
るカムシャフトの回転を円滑にするため動力を伝達する
ベルトなどの張力を状況に応じ調整するオートテンショ
ナーなどに利用される回転体として、従来より全金属製
回転体、金属軸芯と熱硬化性樹脂を一体化した複合回転
体、金属軸芯と熱可塑性樹脂を一体化した複合回転体等
が利用されている。これらのうちでも、金属軸芯と熱可
塑性樹脂を一体化した複合回転体は、全金属製回転体に
比較し軽量であることや、金属軸芯と熱硬化性樹脂を一
体化した複合回転体に比較し製法が簡便であることから
今後更に利用分野が拡がると予想される。2. Description of the Related Art For example, a rotating body used for an auto tensioner for adjusting the tension of a belt or the like for transmitting power according to the situation to smooth the rotation of a cam shaft for driving a valve of an automobile engine has been conventionally used. A metal rotating body, a composite rotating body in which a metal shaft core and a thermosetting resin are integrated, a composite rotating body in which a metal shaft core and a thermoplastic resin are integrated, and the like are used. Among these, the composite rotor in which the metal shaft core and the thermoplastic resin are integrated is lighter than the all-metal rotor, and the composite rotor in which the metal shaft core and the thermosetting resin are integrated. It is expected that the field of use will be further expanded in the future because the manufacturing method is simpler than that of the above.
【０００３】かかる回転体には、動力伝達体から掛かる
張力に耐える強度が必要とされるため、従来の金属軸芯
と熱可塑性樹脂を一体化した複合回転体は、図４に示す
ようにリブを有する形状となっている。図４において、
１は金属軸芯、２は軸受け部、３は連結部、４は外周
部、５はリブである。[0003] Since such a rotating body is required to have strength to withstand the tension applied from the power transmission body, a conventional composite rotating body in which a metal shaft core and a thermoplastic resin are integrated as shown in FIG. It has a shape having. In FIG.
1 is a metal shaft core, 2 is a bearing portion, 3 is a connecting portion, 4 is an outer peripheral portion, and 5 is a rib.
【０００４】更に、回転体には、動力損失や場合よって
は駆動状態での静粛性などの性能が要求されるが、本発
明者らの検討では回転体の真円性や表面性が劣る場合、
動力伝達体のぶれなどが発生し動力損失や騒音の発生な
どの原因となっていた。Further, the rotating body is required to have performances such as power loss and, in some cases, quietness in a driving state. However, the present inventors have studied that the rotating body has poor roundness and poor surface properties. ,
The power transmission body has been shaken, causing power loss and noise.
【０００５】図４に示すような従来のリブ構造を有する
回転体は、リブ部のひけによる凸凹やリブ間の収縮など
に起因して真円性や表面性に欠けるため、動力損失や騒
音の発生が大きいという問題があり、場合によっては動
力損失や騒音を抑えるために成形後、切削など煩雑で非
効率的な後処理で表面の改善を行う必要があるという問
題もあった。A conventional rotating body having a rib structure as shown in FIG. 4 lacks roundness and surface properties due to unevenness due to sinking of the rib portion and contraction between the ribs. There is a problem that generation is large, and in some cases, it is necessary to improve the surface by complicated and inefficient post-processing such as cutting after molding in order to suppress power loss and noise.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、前記従来の
金属軸芯と熱可塑性樹脂を一体化した複合回転体の課題
である真円性や表面性を改善し、駆動体の動力伝達に優
れ、騒音の発生のない金属軸芯と熱可塑性樹脂を一体化
した複合回転体を効率的に提供することを目的とする。SUMMARY OF THE INVENTION The present invention improves the circularity and surface properties of the conventional composite rotating body in which a metal shaft core and a thermoplastic resin are integrated, and improves power transmission of a driving body. An object of the present invention is to efficiently provide a composite rotating body in which a metal shaft core and a thermoplastic resin that are excellent and generate no noise are integrated.
【０００７】[0007]
【課題を解決するための手段】本発明者らは前記課題を
達成するために、従来の金属軸芯と熱可塑性樹脂を一体
化した複合回転体で多用されているリブを無くすことが
課題達成の必須要件であるとの観点で、リブの無い形状
で従来形状と同等以上の張力に耐え得る強度を有する形
状を有限要素法による解析により見出し、該形状の成形
品を作成し、その効果を確認した。その結果、本発明者
らが見出した形状の金属軸芯と熱可塑性樹脂を一体化し
た複合回転体は従来の形状の回転体と同等以上の張力に
耐え得る強度が得られ、又真円性や表面性も従来形状の
回転体に比較し良好であった。Means for Solving the Problems In order to achieve the above-mentioned object, the present inventors have achieved an object to eliminate a rib which is frequently used in a conventional composite rotating body in which a metal shaft core and a thermoplastic resin are integrated. From the viewpoint that it is an indispensable requirement, a shape without ribs and having a strength that can withstand a tension equal to or higher than that of the conventional shape is found by analysis by the finite element method, a molded article of the shape is created, and the effect is created. confirmed. As a result, the composite rotating body obtained by integrating the metal shaft core and the thermoplastic resin having the shape found by the present inventors has strength capable of withstanding a tension equal to or higher than that of the rotating body having the conventional shape, and has a roundness. Also, the surface properties were better than those of the conventional rotating body.
【０００８】本発明者らは更に、金属軸芯と熱可塑性樹
脂を一体化した複合回転体の成形工程での、冷却過程で
発生する熱可塑性樹脂の体積収縮の挙動を制御すること
で真円性や表面性をいっそう改善することが可能である
との仮定で、金属軸芯と熱可塑性樹脂を一体化した複合
回転体の成形方法を検討した結果、極めて優れた真円性
や表面性を有する金属軸芯と熱可塑性樹脂を一体化した
複合回転体を得ることを達成した。[0008] The present inventors further control the volume shrinkage behavior of the thermoplastic resin generated in the cooling process in the molding process of the composite rotating body in which the metal shaft core and the thermoplastic resin are integrated, thereby realizing a perfect circle. Assuming that it is possible to further improve the formability and surface properties, as a result of examining a molding method for a composite rotating body that integrates a metal shaft core and a thermoplastic resin, It has been achieved that a composite rotating body in which the metal shaft core and the thermoplastic resin are integrated is obtained.
【０００９】即ち本発明は、熱可塑性樹脂外層と金属軸
芯が一体となった複合回転体であって、熱可塑性樹脂外
層が金属軸心と接する軸受け部、駆動体と接する外周部
及び軸受け部と外周部を連結する連結部よりなり、外周
部の径方向の厚みが３ｍｍ以上、連結部の幅方向の厚み
が外周部の径方向の厚みの４０％以上であることを特徴
とする複合回転体及び金属軸芯を金型内に設置し熱可塑
性樹脂の一部を射出し第１の樹脂外層を成形する第１の
工程と、第１の樹脂部外層の少なくとも外周部を覆うよ
うに残りの熱可塑性樹脂を射出し第２の樹脂外層を成形
する第２の工程を有することを特徴とする複合回転体の
製造方法である。That is, the present invention relates to a composite rotating body in which a thermoplastic resin outer layer and a metal shaft are integrated, wherein a bearing portion in which the thermoplastic resin outer layer is in contact with the metal shaft, an outer peripheral portion in contact with the driving body, and a bearing portion. And a connecting portion connecting the outer peripheral portion and the outer peripheral portion, wherein the radial thickness of the outer peripheral portion is 3 mm or more, and the thickness of the connecting portion in the width direction is 40% or more of the radial thickness of the outer peripheral portion. A first step of molding the first resin outer layer by injecting a part of the thermoplastic resin by placing the body and the metal shaft core in the mold, and leaving the first resin part outer layer to cover at least the outer peripheral part thereof And a second step of injecting the thermoplastic resin to form a second resin outer layer.
【００１０】[0010]
【発明の実施の形態】以下、本発明の複合回転体の実施
の形態を図面を用いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the composite rotating body according to the present invention will be described below with reference to the drawings.
【００１１】図１は、本発明の複合回転体の一例を示す
正面図であり、図２はその断面図である。図１及び図２
において、１は金属軸芯、２は軸受け部、３は連結部、
４は外周部である。FIG. 1 is a front view showing an example of the composite rotating body of the present invention, and FIG. 2 is a sectional view thereof. 1 and 2
, 1 is a metal shaft core, 2 is a bearing portion, 3 is a connecting portion,
Reference numeral 4 denotes an outer peripheral portion.
【００１２】図１及び図２に示すように、金属軸芯１に
接する軸受け部２、駆動体と接する外周部４及び軸受け
部２と外周部４を連結する連結部３が一体となって熱可
塑性樹脂外層を形成する。As shown in FIGS. 1 and 2, a bearing portion 2 in contact with a metal shaft core 1, an outer peripheral portion 4 in contact with a driving body, and a connecting portion 3 connecting the bearing portion 2 and the outer peripheral portion 4 are integrally formed with heat. Form a plastic resin outer layer.
【００１３】本発明の複合回転体は、外周部の径方向の
厚みＸが３ｍｍ以上、好ましくは３ｍｍ〜１０ｍｍ、連
結部の幅方向の厚みＹが外周部の径方向の厚みＸの４０
％以上、好ましくは４０％〜８５％、より好ましくは５
０％〜７５％、更に好ましくは３ｍｍ以上である。In the composite rotating body of the present invention, the radial thickness X of the outer peripheral portion is 3 mm or more, preferably 3 mm to 10 mm, and the thickness Y of the connecting portion in the width direction is 40 times the radial thickness X of the outer peripheral portion.
% Or more, preferably 40% to 85%, more preferably 5%
0% to 75%, more preferably 3 mm or more.
【００１４】外周部の径方向の厚みＸが３ｍｍ以上であ
れば、強度、真円性や表面性を維持することができ好ま
しい。また、成形性、経済性、複合回転体の重量の観点
から、外周部の径方向の厚みＸは１０ｍｍ以下であるの
が好ましい。When the thickness X in the radial direction of the outer peripheral portion is 3 mm or more, strength, roundness and surface properties can be maintained, which is preferable. Further, from the viewpoints of moldability, economy, and weight of the composite rotating body, the radial thickness X of the outer peripheral portion is preferably 10 mm or less.
【００１５】連結部の幅方向の厚みＹが外周部の径方向
の厚みＸの４０％以上であれば、強度、真円性や表面性
を維持することができ好ましい。また、成形性、経済
性、複合回転体の重量の観点から、連結部の幅方向の厚
みＹが外周部の径方向の厚みＸは８５％以下であるのが
好ましい。When the thickness Y in the width direction of the connecting portion is 40% or more of the thickness X in the radial direction of the outer peripheral portion, strength, roundness and surface property can be maintained, which is preferable. Further, from the viewpoint of moldability, economy, and weight of the composite rotating body, it is preferable that the thickness Y in the width direction of the connecting portion is 85% or less in the radial direction X of the outer peripheral portion.
【００１６】本発明の複合回転体は、上記形状とするこ
とで、リブを必要とせずに駆動体による張力に十分耐え
得る強度を維持することが出来る。しかも、リブを必要
としないため、リブ部のひけによる凸凹やリブ間の収縮
などによる真円性や表面性の低下はなく、複合回転体の
表面において幅方向、周方向のいずれにおいても真円性
を０．２％以下となす事が可能であり、駆動体からの動
力伝達の損失や騒音の発生を抑えることができる。ここ
で、真円性とは、金属軸芯１の中心点から熱可塑性樹脂
外層の最外層表面までの寸法の変動率をいう。By adopting the above-described shape, the composite rotating body of the present invention can maintain strength enough to withstand the tension caused by the driving body without requiring ribs. Moreover, since no ribs are required, there is no reduction in roundness or surface properties due to unevenness due to sinking of the ribs or shrinkage between the ribs, and a perfect circle in the width direction and the circumferential direction on the surface of the composite rotating body. Performance can be reduced to 0.2% or less, and loss of power transmission from the driving body and generation of noise can be suppressed. Here, the circularity refers to a rate of change in dimension from the center point of the metal shaft core 1 to the outermost surface of the thermoplastic resin outer layer.
【００１７】本発明に用いる熱可塑性樹脂としては、通
常一般に用いられる熱可塑性樹脂が使用できるが、結晶
性樹脂が回転体として要求される性能を満たす上で好ま
しい。なかでも、ポリアミド樹脂、特にガラス繊維ある
いはマイカ、タルク、カオリン、ワラストナイトなど一
般に用いられる補強材から選ばれた少なくとも１種以上
で強化したポリアミド樹脂が好適である。As the thermoplastic resin used in the present invention, a generally used thermoplastic resin can be used, but a crystalline resin is preferable to satisfy the performance required for a rotating body. Among them, a polyamide resin, particularly a polyamide resin reinforced with at least one selected from glass fiber or a generally used reinforcing material such as mica, talc, kaolin, wollastonite, and the like, is preferable.
【００１８】次に、複合回転体の製造方法について説明
する。Next, a method of manufacturing the composite rotating body will be described.
【００１９】複合回転体の製造方法は特に限定されず、
通常の射出成形等を適用できるが、金属軸芯を金型内に
設置し熱可塑性樹脂の一部を射出し第１の樹脂外層を成
形する第１の工程と、第１の樹脂部外層の少なくとも外
周部を覆うように残りの熱可塑性樹脂を射出し第２の樹
脂外層を成形する第２の工程を有する製造方法により、
真円性と表面性をより一層向上せしめることが可能であ
る。The method for producing the composite rotating body is not particularly limited.
A normal injection molding or the like can be applied, but a first step of setting a metal shaft core in a mold, injecting a part of the thermoplastic resin to form a first resin outer layer, and a first resin part outer layer. By a manufacturing method having a second step of injecting the remaining thermoplastic resin to cover at least the outer peripheral portion and molding a second resin outer layer,
It is possible to further improve roundness and surface properties.
【００２０】前記したように真円性や表面性は、金属軸
芯の周囲に射出し形成する熱可塑性樹脂外層の収縮の状
態に影響される。本発明の方法では、先ず熱可塑性樹脂
外層を形成する熱可塑性樹脂の一部を軸芯となる金属体
の周囲に射出し、第１の樹脂外層を成形し、第１の樹脂
外層を冷却固化、収縮させた後、ふたたび第１の樹脂外
層の外周に新たな熱可塑性樹脂を射出し、第２の樹脂外
層を成形させることにより、第１の工程で生ずる熱可塑
性樹脂の収縮を第２の工程で補填するため、熱可塑性樹
脂外層部を１回の工程で形成させる場合に比較し樹脂外
層部全体の収縮は少なく真円性や平滑性が極めて良好と
なる。As described above, the roundness and surface properties are affected by the state of contraction of the thermoplastic resin outer layer formed by injection around the metal shaft core. In the method of the present invention, first, a part of a thermoplastic resin forming a thermoplastic resin outer layer is injected around a metal body serving as a shaft core, a first resin outer layer is formed, and the first resin outer layer is cooled and solidified. After the contraction, a new thermoplastic resin is again injected to the outer periphery of the first resin outer layer, and the second resin outer layer is molded, whereby the contraction of the thermoplastic resin caused in the first step is reduced to the second resin outer layer. Since the thermoplastic resin outer layer portion is formed in one step, shrinkage of the entire resin outer layer portion is small and circularity and smoothness are extremely good because the resin layer is compensated in the process.
【００２１】第２の工程においては、図３（ａ）に示す
ように、少なくとも第１の樹脂外層６の外周部３を覆う
ように残りの熱可塑性樹脂を射出する必要があるが、第
１の樹脂外層６と第２の樹脂外層７の境界面を強固に接
合する上で、図３（ｂ）に示すように第１の樹脂外層６
の全体を覆うように残りの熱可塑性樹脂を射出すること
が好ましい。In the second step, as shown in FIG. 3A, it is necessary to inject the remaining thermoplastic resin so as to cover at least the outer peripheral portion 3 of the first resin outer layer 6; In order to firmly join the boundary surface between the resin outer layer 6 and the second resin outer layer 7, the first resin outer layer 6 as shown in FIG.
It is preferable to inject the remaining thermoplastic resin so as to cover the entirety.
【００２２】また、第１の工程、第２の工程で使用する
熱可塑性樹脂の割合は特に限定されないが、第１の工程
で使用する比率が４０重量％以上８０重量％未満、好ま
しくは６０重量％以上８０重量％未満が良好な真円性と
表面性を得る上で好ましい。The ratio of the thermoplastic resin used in the first step and the second step is not particularly limited, but the ratio used in the first step is 40% by weight or more and less than 80% by weight, preferably 60% by weight. % Or more and less than 80% by weight is preferable for obtaining good roundness and surface properties.
【００２３】具体的には、例えば、通常のインサート射
出成形で実施されると同様に第１の工程で第１の樹脂外
層を成形し、該成形物を再度金型の所定位置内にインサ
ートし通常のインサート射出成形で実施されると同様に
第２の樹脂外層を成形する方法、第２の樹脂外層に相当
する部分をスライド可能な構造とした金型を用いること
により第１の工程から第２の工程を連続的に実施する方
法等が適用できるが、これらの方法には限定されない。More specifically, for example, a first resin outer layer is formed in a first step in the same manner as in usual insert injection molding, and the molded product is inserted again into a predetermined position of a mold. A method for molding the second resin outer layer in the same manner as that performed in the usual insert injection molding, and a method in which a portion corresponding to the second resin outer layer is configured to be slidable from the first step to the first step. A method of continuously performing the second step can be applied, but the method is not limited to these methods.
【００２４】[0024]
【実施例】以下実施例により本発明を更に詳細に説明す
るが、以下の実施例は本発明の一部を例示するものであ
り、本発明を限定するものではない。EXAMPLES The present invention will be described in more detail with reference to the following Examples, which are illustrative of some of the present invention and do not limit the present invention.
【００２５】尚、実施例で用いた評価方法は以下の通り
である。The evaluation method used in the examples is as follows.
【００２６】（１）最大発生応力：熱可塑性樹脂外層の
連結部を拘束し、熱可塑性樹脂外層端部２０ｍｍの範囲
に線荷重１００ｋｇｆを負荷した時の最大発生応力であ
る。(1) Maximum generated stress: This is the maximum generated stress when a linear load of 100 kgf is applied to the end portion of the thermoplastic resin outer layer in a range of 20 mm while restraining the connecting portion of the thermoplastic resin outer layer.
【００２７】（２）実機強度試験：駆動体から面荷重５
００ｋｇ／５０ｍｍ2を負荷し、１，８００ｒｐｍで１
６８ｈｒ運転後の面ぶれ、騒音状態から判定した。(2) Actual machine strength test: surface load 5 from driving body
Load at 100 kg / 50 mm 2 and 1 at 1,800 rpm
Judgment was made based on surface runout and noise after 68 hours of operation.
【００２８】（３）真円性：熱可塑性樹脂外層の最外層
表面の円周方向の全周を（株）ミツトヨ製ラウンドテス
トＲＡ４００で測定し、最大値と最小値の差及び回転体
直径に対する比率で示した。(3) Roundness: The entire circumference of the outermost layer surface of the thermoplastic resin outer layer in the circumferential direction was measured by a round test RA400 manufactured by Mitutoyo Corporation, and the difference between the maximum value and the minimum value and the diameter of the rotating body were measured. The ratio is shown.
【００２９】（４）表面性：熱可塑性樹脂外層の最外層
表面の幅方向にリブ接合部の凹み量及び回転体直径に対
する比率を測定した。(4) Surface properties: The amount of depression of the rib joint and the ratio to the diameter of the rotating body were measured in the width direction of the outermost layer surface of the thermoplastic resin outer layer.
【００３０】また、実施例における成形条件は以下の通
りである。The molding conditions in the examples are as follows.
【００３１】使用樹脂：ガラス繊維３３％を含有するポ
リアミド樹脂（旭化成工業（株）製レオナ１３００Ｇ） 射出成形機：日精樹脂工業（株）製ＦＥ１２０Ｓ 金型温度：８０℃ 成形温度：２９５℃ 冷却時間：３５秒。Resin used: Polyamide resin containing 33% of glass fiber (Leona 1300G manufactured by Asahi Chemical Industry Co., Ltd.) Injection molding machine: FE120S manufactured by Nissei Plastic Industry Co., Ltd. Mold temperature: 80 ° C. Molding temperature: 295 ° C. Cooling time : 35 seconds.
【００３２】（実施例１，２，比較例２）熱可塑性樹脂
外層を一回の工程で成形することにより、図１及び図２
に示す複合回転体を製造した。複合回転体の各部寸法及
び評価結果を表１に示す。(Examples 1, 2 and Comparative Example 2) By molding the outer layer of the thermoplastic resin in a single step, FIGS.
Was manufactured. Table 1 shows dimensions and evaluation results of each part of the composite rotating body.
【００３３】（実施例３）熱可塑性樹脂外層部を形成す
る樹脂の６０重量％を用いて第１の樹脂外層を成形した
後、他の金型で第１の樹脂外層の全体を覆う様に残りの
樹脂を用いて第２の樹脂外層を成形することにより、図
１及び図２に示す複合回転体を製造した。複合回転体の
各部寸法及び評価結果を表１に示す。Example 3 After forming the first resin outer layer using 60% by weight of the resin forming the thermoplastic resin outer layer portion, the first resin outer layer was entirely covered with another mold. By forming a second resin outer layer using the remaining resin, the composite rotating body shown in FIGS. 1 and 2 was manufactured. Table 1 shows dimensions and evaluation results of each part of the composite rotating body.
【００３４】（比較例１）熱可塑性樹脂外層を一回の工
程で成形することにより、図４に示すリブを有する複合
回転体を製造した。複合回転体の各部寸法及び評価結果
を表１に示す。Comparative Example 1 A composite rotating body having ribs as shown in FIG. 4 was manufactured by molding a thermoplastic resin outer layer in a single step. Table 1 shows dimensions and evaluation results of each part of the composite rotating body.
【００３５】[0035]
【表１】 [Table 1]
【００３６】[0036]
【発明の効果】本発明の複合回転体は、従来の回転体や
その製法に比較し、煩雑な２次加工処理などを要せずに
強度を維持した上に優れた真円性や表面性の回転体を容
易に得ることが出来、さらに優れた真円性や表面性によ
り動力損失や騒音の発生を少なくすることが可能であ
り、実用上大きな利点を与えるものである。The composite rotating body of the present invention has excellent roundness and surface properties while maintaining strength without requiring complicated secondary processing, etc., as compared with the conventional rotating body and its manufacturing method. Can easily be obtained, and power loss and generation of noise can be reduced due to the excellent roundness and surface properties, which provides a great advantage in practical use.
【図１】本発明の複合回転体の一例を示す正面図であ
る。FIG. 1 is a front view showing an example of a composite rotating body of the present invention.
【図２】本発明の複合回転体の一例を示す断面図であ
る。FIG. 2 is a cross-sectional view illustrating an example of the composite rotating body of the present invention.
【図３】本発明の製造方法を説明する概略図である。FIG. 3 is a schematic diagram illustrating a manufacturing method of the present invention.
【図４】従来の複合回転体を示す正面図である。FIG. 4 is a front view showing a conventional composite rotating body.
１ 金属軸芯 ２ 軸受け部 ３ 連結部 ４ 外周部 ５ リブ ６ 第１の樹脂外層 ７ 第２の樹脂外層 DESCRIPTION OF SYMBOLS 1 Metal shaft core 2 Bearing part 3 Connecting part 4 Outer peripheral part 5 Rib 6 1st resin outer layer 7 2nd resin outer layer
Claims (5)
った複合回転体であって、熱可塑性樹脂外層が金属軸心
と接する軸受け部、駆動体と接する外周部及び軸受け部
と外周部を連結する連結部よりなり、外周部の径方向の
厚みが３ｍｍ以上、連結部の幅方向の厚みが外周部の径
方向の厚みの４０％以上であることを特徴とする複合回
転体。1. A composite rotating body in which a thermoplastic resin outer layer and a metal shaft are integrated, wherein the thermoplastic resin outer layer is in contact with a metal shaft, an outer peripheral portion is in contact with a driver, and a bearing portion and an outer peripheral portion. Wherein the radial thickness of the outer peripheral portion is 3 mm or more, and the thickness of the connecting portion in the width direction is 40% or more of the radial thickness of the outer peripheral portion.
ｍであることを特徴とする請求項１に記載の複合回転
体。2. A radial thickness of the outer peripheral portion is 3 mm to 10 m.
The composite rotating body according to claim 1, wherein m is m.
の厚みの４０％〜８５％であることを特徴とする請求項
１〜２に記載の複合回転体。3. The composite rotating body according to claim 1, wherein the thickness of the connecting portion in the width direction is 40% to 85% of the radial thickness of the outer peripheral portion.
アミド樹脂よりなることを特徴とする請求項１〜３に記
載の複合回転体。4. The composite rotating body according to claim 1, wherein the thermoplastic resin outer layer is made of a glass fiber reinforced polyamide resin.
の一部を射出し第１の樹脂外層を成形する第１の工程
と、第１の樹脂部外層の少なくとも外周部を覆うように
残りの熱可塑性樹脂を射出し第２の樹脂外層を成形する
第２の工程を有することを特徴とする複合回転体の製造
方法。5. A first step of placing a metal shaft core in a mold and injecting a part of a thermoplastic resin to form a first resin outer layer, and covering at least an outer peripheral portion of the first resin part outer layer. And a second step of injecting the remaining thermoplastic resin to form a second resin outer layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12907797A JPH10318252A (en) | 1997-05-20 | 1997-05-20 | Composite rotary body and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12907797A JPH10318252A (en) | 1997-05-20 | 1997-05-20 | Composite rotary body and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10318252A true JPH10318252A (en) | 1998-12-02 |
Family
ID=15000514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12907797A Pending JPH10318252A (en) | 1997-05-20 | 1997-05-20 | Composite rotary body and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10318252A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112512883A (en) * | 2018-07-31 | 2021-03-16 | 奔迪士商业运输***公司 | Bushing assembly for spring brake actuator of vehicle air brake system |
-
1997
- 1997-05-20 JP JP12907797A patent/JPH10318252A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112512883A (en) * | 2018-07-31 | 2021-03-16 | 奔迪士商业运输***公司 | Bushing assembly for spring brake actuator of vehicle air brake system |
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