JPH054255A - Insert molding method of transmission member - Google Patents
Insert molding method of transmission memberInfo
- Publication number
- JPH054255A JPH054255A JP20336091A JP20336091A JPH054255A JP H054255 A JPH054255 A JP H054255A JP 20336091 A JP20336091 A JP 20336091A JP 20336091 A JP20336091 A JP 20336091A JP H054255 A JPH054255 A JP H054255A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- transmission member
- insert
- molding
- 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.)
- Pending
Links
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
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14344—Moulding in or through a hole in the article, e.g. outsert moulding
-
- 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
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14344—Moulding in or through a hole in the article, e.g. outsert moulding
- B29C2045/1436—Moulding in or through a hole in the article, e.g. outsert moulding coating hollow articles having holes passing through the wall
-
- 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
- B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
-
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Pulleys (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、伝動部材のインサート
成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for insert molding a transmission member.
【０００２】[0002]
【発明の背景】伝動部材とは、二以上の部材が接触して
相互の摩擦力により動力を一方から他方へそのまま又は
変換して伝える部材を言うものであり、具体的には、歯
車、カム、摩擦車、つめ車、鎖車、星形車、エスケープ
車、ころ、滑車、プーリー等である。従来、これらの伝
動部材を、シャフトないしは軸受部等と伝動接触面部分
とを異なる材質によって成形する場合、シャフトないし
は軸受部等をインサート部材とし、伝動接触面部分を樹
脂成形部とするインサート成形による成形方法が、特開
平２−４１２２２号公報に記載の如く行われている。BACKGROUND OF THE INVENTION A transmission member means a member that two or more members come into contact with each other to transmit power as they are or converted from one to the other by mutual frictional force, and specifically, gears and cams. , Friction wheel, ratchet wheel, chain wheel, star wheel, escape wheel, roller, pulley, pulley, etc. Conventionally, when molding these transmission members with different materials for the shaft or bearing and the transmission contact surface portion, insert molding is performed with the shaft or bearing portion as the insert member and the transmission contact surface portion as the resin molding portion. The molding method is performed as described in JP-A-2-41222.
【０００３】係るインサート成形方法によれば、ゲート
から注入された樹脂の一部がインサート部材内の樹脂通
路を通って樹脂成形部を形成するため、樹脂成形部に後
工程によってインサート部材を挿通したものに比して、
樹脂成形部とインサート部材との一体性が高く、相対位
置のずれが少ない伝動部材を得ることができる。According to such an insert molding method, a part of the resin injected from the gate passes through the resin passage in the insert member to form the resin molded portion. Therefore, the insert member is inserted into the resin molded portion in a later step. Compared to things
It is possible to obtain a transmission member in which the resin molding portion and the insert member have a high degree of integration and whose relative position is less displaced.
【０００４】この様な従来のインサート成形方法では、
金型内に予めインサート部材を自動または半自動でセッ
トして樹脂成形部の表面に相当する部分に、即ち、キャ
ビティー外周面にゲートを設けた金型で成形している
（図７参照）。According to such a conventional insert molding method,
The insert member is automatically or semi-automatically set in advance in the mold and is molded in the mold corresponding to the surface of the resin molding part, that is, the mold having the gate on the outer peripheral surface of the cavity (see FIG. 7).
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記従来の成
形方法では、樹脂注入ノズル先端の冷却した樹脂が、キ
ャビティー内へ注入されるとフローマークやショートシ
ョット等の不良発生の原因となる。特に伝動部材として
の機能上、最も重要である伝動接触面に前記冷却した樹
脂が送り込まれてしまった場合、伝動接触面強度が低下
するだけでなく、伝動部材としての絶対的な機械的強度
や部品的信頼性が全く得られなくなるという重大な欠点
を有している。However, in the above-described conventional molding method, when the cooled resin at the tip of the resin injection nozzle is injected into the cavity, it causes defects such as flow marks and short shots. In particular, in terms of the function as a transmission member, when the cooled resin is sent to the transmission contact surface, which is the most important, not only the strength of the transmission contact surface decreases, but also the absolute mechanical strength as a transmission member and It has a serious drawback that no reliability of parts can be obtained.
【０００６】また、キャビティー外周面にゲートを設け
た金型で成形しているので、樹脂成形部の表面にゲート
痕が残るため、該ゲート痕の切削及び研磨等の後処理工
程が必要であるだけでなく、切削及び研磨の度合いによ
っては、面と面との平行性や平面性が損なわれたり、仕
上がり寸法の狂いが生じたり、ウェルドラインが残るた
め、強度を落とす場合があるという欠点を有している。Further, since the mold is formed by a mold having a gate provided on the outer peripheral surface of the cavity, a gate mark remains on the surface of the resin molding portion, and therefore a post-treatment process such as cutting and polishing of the gate mark is required. Not only that, but depending on the degree of cutting and polishing, the parallelism and flatness of the surfaces may be impaired, the finished dimensions may be misaligned, and weld lines may remain, resulting in a decrease in strength. have.
【０００７】係るゲートは、その位置、個数及び形状等
の条件によって樹脂成形部の寸法精度及び強度に大きく
影響するものであり、金型設計時に経験やコンピュータ
計算による金型内樹脂流動解析または強度解析等に基づ
き、製品全体としての最高強度が得られるように最適な
設計条件を決定する必要がある。The gate has a great influence on the dimensional accuracy and strength of the resin molding portion depending on conditions such as the position, number and shape of the gate. It is necessary to determine the optimum design conditions based on analysis etc. so that the maximum strength of the entire product can be obtained.
【０００８】しかし、従来の金型では、ゲート以外の他
の条件、例えば、スプールまたはランナーの位置、イン
サート部材の位置、前記後処理工程時の切削及び研磨の
行い易さ等、様々な条件を考慮して金型設計条件が決定
されているため、前記キャビティー外周面のゲート位置
は寸法精度及び強度の点で理想的な位置とは云えず、こ
のような金型によるインサート成形によれば、樹脂の流
れが矢符Ｙで示すように不均一で偏ったものとなった
り、ウェルドラインが発生するため、樹脂成形部の寸法
安定性及び精度、並びに機械強度が部位によって一定で
はないと云う欠点を有している。However, in the conventional mold, various conditions other than the gate, such as the position of the spool or the runner, the position of the insert member, the ease of cutting and polishing during the post-treatment process, etc., can be satisfied. Since the mold design conditions are determined in consideration, the gate position on the outer peripheral surface of the cavity cannot be said to be an ideal position in terms of dimensional accuracy and strength. It is said that the resin flow becomes uneven and uneven as shown by the arrow Y, or a weld line is generated, so that the dimensional stability and accuracy of the resin molding portion and the mechanical strength are not constant depending on the site. It has drawbacks.
【０００９】[0009]
【発明の目的】そこで本発明の目的は、伝動接触面強度
が高く機械的強度及び部品的信頼性の向上した伝動部材
のインサート成形方法を提供することにある。SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an insert molding method for a transmission member having a high transmission contact surface strength and improved mechanical strength and component reliability.
【００１０】[0010]
【課題を解決するための手段】本発明者らは上記目的を
達成するため、鋭意検討を重ねた結果、本発明に至った
ものである。The inventors of the present invention have made extensive studies to achieve the above object, and as a result, the present invention has been achieved.
【００１１】即ち、本発明に係る伝動部材インサート成
形方法は、先端又は終端にコールドスラグウェル部を有
するスプールまたはランナーが内部に形成されていると
共に、一ないし複数のゲートが成形後に樹脂によって被
覆される部分に形成されているインサート部材を用い、
該インサート部材のスプールまたはランナー及びゲート
を介して溶融状態の樹脂を金型内に送り込むことを特徴
とする。That is, in the transmission member insert molding method according to the present invention, a spool or a runner having a cold slug well portion at the tip or the end is formed inside, and one or a plurality of gates are covered with resin after molding. Using the insert member formed in the
It is characterized in that the molten resin is fed into the mold through the spool or the runner and the gate of the insert member.
【００１２】また本発明に係る伝動部材インサート成形
方法の好ましい実施態様は、インサート部材周囲に２以
上の樹脂成形部を独立して成形することである。A preferred embodiment of the transmission member insert molding method according to the present invention is to independently mold two or more resin molding parts around the insert member.
【００１３】[0013]
【作用】本発明によれば、溶融した樹脂がインサート部
材の内部の中空部であるスプールまたはランナーを通過
し、インサート部材に形成された透孔部であるゲートか
ら金型内に送り込まれて、伝動部材が得られる。このと
き、樹脂注入ノズル先端の冷却した樹脂は、スプール又
はランナーの先端又は終端に形成されているコールドス
ラグウェル部に入り込むことにより、金型内に送り込ま
れることがないので、フローマークやショートショット
等の不良発生の原因となることがない。According to the present invention, the molten resin passes through the spool or runner, which is a hollow portion inside the insert member, and is fed into the mold from the gate, which is a through hole formed in the insert member, A transmission member is obtained. At this time, the cooled resin at the tip of the resin injection nozzle will not be sent into the mold by entering the cold slag well portion formed at the tip or the end of the spool or runner. It does not cause the occurrence of defects such as.
【００１４】また、樹脂成形部を二以上とした場合であ
っても、金型スプールまたはランナーの通路を複雑とし
たり、樹脂注入ノズルを二以上としたりすることなく、
一つの樹脂注入ノズルによって極めて容易に成形するこ
とができる。Further, even when there are two or more resin molding parts, there is no need to complicate the passage of the mold spool or runner, or to have two or more resin injection nozzles.
It can be molded extremely easily by one resin injection nozzle.
【００１５】また、得られた伝動部材は、表面にゲート
痕が残らないため、切削及び研磨等の後処理が不要であ
る。Further, the obtained transmission member does not have a gate mark on the surface thereof, so that post-processing such as cutting and polishing is unnecessary.
【００１６】更に、得られた伝動部材は、樹脂が樹脂成
形部とインサート部材の内部とにおいて一体的となって
いるので、インサート部材の位置ズレ及び抜け等を完全
に防止することができる。Further, in the obtained transmission member, the resin is integrated in the resin molding portion and the inside of the insert member, so that the positional deviation and the detachment of the insert member can be completely prevented.
【００１７】[0017]
【実施例】以下、本発明の実施例について添付図面に基
づき説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１８】図１はインサート部材をセットした状態の
金型を示す概略断面図、図２は図１の金型によって得ら
れた伝動部材の一例を示す断面図、図３は本発明の成形
方法によって得られる伝動部材の他の例を示す断面図、
図４は本発明の成形方法によって得られる伝動部材の他
の例を示す断面図、図５は本発明の成形方法によって得
られる伝動部材の他の例を示す断面図、図６は本発明の
成形方法によって得られる伝動部材の他の例を示す断面
図、図７は従来の成形方法による伝動部材及び金型を示
す概略断面図である。FIG. 1 is a schematic sectional view showing a mold with an insert member set, FIG. 2 is a sectional view showing an example of a transmission member obtained by the mold of FIG. 1, and FIG. 3 is a molding method of the present invention. Sectional drawing which shows the other example of the transmission member obtained by
FIG. 4 is a sectional view showing another example of the transmission member obtained by the molding method of the present invention, FIG. 5 is a sectional view showing another example of the transmission member obtained by the molding method of the present invention, and FIG. FIG. 7 is a sectional view showing another example of the transmission member obtained by the molding method, and FIG. 7 is a schematic sectional view showing the transmission member and the mold by the conventional molding method.
【００１９】図１において、１は二つの割型１Ａ・１Ｂ
から成る金型であり、成形の度に後述する構成を有する
インサート部材４がセットされた後、該金型１のキャビ
ティー２に樹脂注入ノズル３によって樹脂が注入され
て、図２に示す如きインサート部材４の周囲に樹脂成形
部６が被覆成形された伝動部材５が成形されるものであ
る。尚、樹脂成形部６の表面である６Ａは、伝動部材５
の伝動接触面であり、該伝動接触面６Ａとは、伝動部材
５が、例えば歯車である場合には、歯車の歯先（ｔｉ
ｐ）、歯末の面（ｆａｃｅ）、歯元の面（ｆｌａｎｋ）
を言うものである。In FIG. 1, 1 is two split molds 1A and 1B.
After the insert member 4 having the structure described below is set for each molding, the resin is injected into the cavity 2 of the mold 1 by the resin injection nozzle 3, and as shown in FIG. The transmission member 5 in which the resin molding portion 6 is covered and molded around the insert member 4 is molded. Incidentally, 6A, which is the surface of the resin molding portion 6, is the transmission member 5
And the transmission contact surface 6A means a tooth tip (ti) of the gear when the transmission member 5 is, for example, a gear.
p), the end surface (face), the root surface (flank)
Is to say.
【００２０】本発明において金型１にセットされるイン
サート部材４には、樹脂成形部６に被覆される部分に一
ないし複数の透孔部４Ｂが形成されて樹脂注入時のゲー
トとなり、且つ該透孔部４Ｂに連続して中空部４Ａが形
成されて樹脂注入時のスプール又はランナーとなる。
尚、ゲートである透孔部４Ｂの位置は、成形後に樹脂成
形部６によって被覆される部分であればよいが、好まし
くは樹脂成形部６の略中心部である。また、その口径及
び個数は、用いられるインサート部材４のサイズや材
質、樹脂の種類、得られる伝動部材５の要求強度等の条
件に応じて適宜決定されるが、複数の透孔部４Ｂを略等
間隔で放射状に設けることが均一成形の点で好ましい。
さらに中空部４Ａであるスプール又はランナーの先端又
は終端には、図１及び図２に示す如くコールドスラグウ
ェル部４Ｃが形成されており、該コールドスラグウェル
部４Ｃの存在により、樹脂を注入した際、樹脂注入ノズ
ル３先端の冷却した樹脂は、前記コールドスラグウェル
部４Ｃに入り込むことになる。In the present invention, the insert member 4 set in the mold 1 is provided with one or a plurality of through holes 4B in the portion covered by the resin molding portion 6 to serve as a gate for resin injection, and A hollow portion 4A is formed continuously with the through hole portion 4B to serve as a spool or a runner during resin injection.
The position of the through hole portion 4B, which is a gate, may be a portion covered by the resin molding portion 6 after molding, but is preferably substantially the central portion of the resin molding portion 6. Further, the diameter and the number thereof are appropriately determined according to conditions such as the size and material of the insert member 4 used, the type of resin, the required strength of the transmission member 5 to be obtained, and the like, but the plurality of through holes 4B are omitted. It is preferable to provide them radially at equal intervals in terms of uniform molding.
Further, as shown in FIGS. 1 and 2, a cold slag well portion 4C is formed at the tip or end of the spool or runner which is the hollow portion 4A. Due to the presence of the cold slag well portion 4C, when the resin is injected, The cooled resin at the tip of the resin injection nozzle 3 enters the cold slag well portion 4C.
【００２１】本発明に係る伝動部材５のインサート成形
方法では、図１に示す如き金型１及び前記構成を有する
インサート部材４を用い、樹脂注入ノズル３から注入さ
れ金型スプールまたはランナー１Ｃを通った樹脂を、イ
ンサート部材４に形成された中空部４Ａ内を通過させた
後、該中空部４Ａに連続して形成された透孔部４Ｂから
キャビティー２内へ注入させるものである。即ち、イン
サート部材４に形成された中空部４Ａをスプールまたは
ランナーとし、透孔部４Ｂをゲートとして、樹脂をキャ
ビティー２内へ注入するのである。この時、注入された
樹脂の内、前述したように樹脂注入ノズル３先端の冷却
した樹脂は、前記コールドスラグウェル部４Ｃに入り込
み、該冷却した樹脂に連続する溶融樹脂が金型１のキャ
ビティー２内へ送り込まれて樹脂成形部６を構成するも
のである。従って、冷却した樹脂が金型１のキャビティ
ー２内へ送り込まれることがなくなるため、樹脂成形部
６にフローマークやショートショット等を生じさせて不
良発生の原因としたり、伝動接触面６Ａの強度を低下さ
せたりするしたりすることがないので、得られる伝動部
材５は、伝動接触面６Ａの強度が高く機械的強度及び部
品的信頼性が向上している。In the insert molding method of the transmission member 5 according to the present invention, the mold 1 as shown in FIG. 1 and the insert member 4 having the above-mentioned structure are used, and the mold is injected from the resin injection nozzle 3 and passed through the mold spool or runner 1C. The resin is passed through the hollow portion 4A formed in the insert member 4 and then injected into the cavity 2 from the through hole portion 4B formed continuously in the hollow portion 4A. That is, the hollow portion 4A formed in the insert member 4 is used as a spool or a runner, and the through hole portion 4B is used as a gate to inject the resin into the cavity 2. At this time, among the injected resins, the cooled resin at the tip of the resin injection nozzle 3 enters the cold slag well portion 4C as described above, and the molten resin continuous to the cooled resin is the cavity of the mold 1. The resin molding portion 6 is formed by being sent into the inside of the resin molding machine 2. Therefore, since the cooled resin is not fed into the cavity 2 of the mold 1, flow marks, short shots, or the like are generated in the resin molding portion 6 to cause a defect or the strength of the transmission contact surface 6A. The resulting transmission member 5 has high strength of the transmission contact surface 6A and improved mechanical strength and reliability of parts.
【００２２】また、本発明の成形方法では、ゲートの位
置が射出成形において理想的な位置である伝動部材５の
樹脂成形部６の略中心となるので、注入した樹脂は樹脂
成形部６の略中心からキャビティー２の外周面、即ち、
伝動接触面６Ａに向かって矢符Ｘで示すように均一に流
動し固化するため、樹脂成形部６の寸法安定性及び精度
が優れている。さらに得られた伝動部材５は、ゲートが
樹脂成形部６によって被覆されるため表面にゲート痕が
残らず、切削及び研磨等の後処理が不要であるだけでな
く、後処理による仕上がり寸法の変化がないため、金型
１の設計に際しては切削量や研摩量等を考慮することな
く、伝動部材５の仕上がり寸法で設計することができ
る。従って、要求される精度の金型によって成形すれ
ば、所望する仕上がり精度の伝動部材５を得ることがで
きる。Further, in the molding method of the present invention, since the position of the gate is substantially the center of the resin molding portion 6 of the transmission member 5 which is an ideal position in injection molding, the injected resin is substantially in the resin molding portion 6. From the center to the outer peripheral surface of the cavity 2, that is,
The resin molding portion 6 has excellent dimensional stability and accuracy because it uniformly flows toward the transmission contact surface 6A as indicated by the arrow X and solidifies. Furthermore, since the gate of the transmission member 5 thus obtained is covered by the resin molding portion 6, no gate marks are left on the surface thereof, so that post-treatment such as cutting and polishing is not necessary, and a change in the finished dimension due to the post-treatment. Therefore, when designing the die 1, the finished dimension of the transmission member 5 can be designed without considering the cutting amount, the polishing amount, and the like. Therefore, by molding with a die having required accuracy, the transmission member 5 with desired finishing accuracy can be obtained.
【００２３】さらに得られた伝動部材５は、樹脂が樹脂
成形部６とインサート部材４の内部である前記中空部４
Ａ及び透孔部４Ｂとにおいて一体的となっているので、
インサート部材４の位置ズレ及び抜け等を完全に防止す
ることができる。従って、インサート部材４の材質及び
樹脂の種類を同一とした場合、従来の成形方法で得られ
た伝動部材に比して、本発明の成形方法で得られた伝動
部材５は機械強度が大きく、部品機能の信頼性が高い。
樹脂成形部６とインサート部材４との一体性をより強固
とするために、図３に示す如く透孔部４Ｂをインサート
部材４外周に形成した溝部４Ｄ内に形成してもよい。Further, the transmission member 5 thus obtained has the hollow portion 4 in which the resin is inside the resin molding portion 6 and the insert member 4.
Since it is integrated with A and the through hole portion 4B,
It is possible to completely prevent the positional deviation and the detachment of the insert member 4. Therefore, when the material of the insert member 4 and the type of resin are the same, the mechanical strength of the transmission member 5 obtained by the molding method of the present invention is higher than that of the transmission member obtained by the conventional molding method. High reliability of parts function.
In order to further strengthen the integrity of the resin molded portion 6 and the insert member 4, the through hole portion 4B may be formed in the groove portion 4D formed on the outer periphery of the insert member 4 as shown in FIG.
【００２４】尚、図示の実施例では、透孔部４Ｂを一列
の放射状に配置した場合を示したが、複数列の放射状な
いしランダムに複数個を配置してもよい。In the illustrated embodiment, the through holes 4B are arranged radially in one row, but a plurality of rows may be arranged radially or randomly.
【００２５】尚また、図示の実施例では、樹脂注入ノズ
ル３からの樹脂の注入を金型１の金型スプールまたはラ
ンナー１Ｃを介してインサート部材４内に注入している
が、本発明はこれに限らず、インサート部材４端部に樹
脂注入ノズル３を圧接して樹脂を直接注入してもよい。
更に樹脂の注入は、樹脂成形部６に近い側のインサート
部材４の端部に限らず、遠い側の端部からでもよいし、
図５に示す如くインサート部材４の表面からでもよい。Further, in the illustrated embodiment, the resin injection from the resin injection nozzle 3 is injected into the insert member 4 via the mold spool of the mold 1 or the runner 1C. However, the resin injection nozzle 3 may be pressed against the end of the insert member 4 to directly inject the resin.
Furthermore, the injection of the resin is not limited to the end of the insert member 4 on the side closer to the resin molding portion 6, but may be from the end on the far side,
It may be from the surface of the insert member 4 as shown in FIG.
【００２６】以上、本発明に係る伝動部材インサート成
形方法の一実施例について説明したが、本発明の成形方
法によれば、得られる伝動部材５の樹脂成形部６は一つ
に限らず、図４、図５及び図６に示すように二以上の場
合にも適用可能である。即ち、図４〜図６に示す如くス
プール又はランナー及びゲートを構成することにより樹
脂成形部６を二以上とした場合であっても、金型スプー
ルまたはランナーの通路を複雑としたり、樹脂注入ノズ
ルを二以上としたりすることなく、一つの樹脂注入ノズ
ル３によって極めて容易に成形可能である。Although one embodiment of the transmission member insert molding method according to the present invention has been described above, according to the molding method of the present invention, the number of resin molding portions 6 of the transmission member 5 to be obtained is not limited to one. It is also applicable to the case of two or more as shown in FIG. That is, even when the number of resin molding portions 6 is two or more by forming the spool or the runner and the gate as shown in FIGS. 4 to 6, the passage of the mold spool or the runner is complicated, or the resin injection nozzle is used. It is possible to mold extremely easily with one resin injection nozzle 3 without having to make two or more.
【００２７】以上、本発明に係る伝動部材の成形方法に
ついて説明したが、本発明は上記に限らず、成形する伝
動部材の態様によって適宜、本発明の範囲内において変
更することができる。尚、インサート部材４及び樹脂成
形部６に用いられる材質例を下記する。Although the method for molding the transmission member according to the present invention has been described above, the present invention is not limited to the above, and can be appropriately changed within the scope of the present invention depending on the mode of the transmission member to be molded. Examples of materials used for the insert member 4 and the resin molding portion 6 will be described below.
【００２８】本発明の方法において使用されるインサー
ト部材４の材質としては、インサート成形による伝動部
材として種々公知の材質、即ち、鉄、ステンレス、アル
ミニウム、真鍮等の金属製あるいはアルミナ、炭化ケイ
素等のセラミックス製、その他耐熱性プラスチック材、
強化木材（紙パルプ等）、竹材等を用いることができ、
樹脂接触面にローレット加工を施してもよい。As the material of the insert member 4 used in the method of the present invention, various known materials as a transmission member by insert molding, that is, metal such as iron, stainless steel, aluminum, brass, or alumina, silicon carbide or the like is used. Ceramics, other heat resistant plastic materials,
Reinforced wood (paper pulp, etc.), bamboo, etc. can be used,
The resin contact surface may be knurled.
【００２９】また、注入される樹脂、即ち、樹脂成形部
６の材質としては、熱可塑性樹脂、熱硬化性樹脂の何れ
で形成されていてもよく、具体的には、熱可塑性樹脂と
しては、例えば、ポリエチレン、ポリプロピレン、ポリ
メチルペンテン、ポリブテン、ポリブタジエン、ポリス
チレン、スチレン−ブタジエン樹脂、ポリ塩化ビニル、
ポリ酢酸ビニル、ポリメチルメタアクリレート、ポリ塩
化ビニリデン、ポリテトラフロロエチレン、ＡＳ樹脂、
ＡＢＳ樹脂、ポリアクリロニトリル、ポリアセタール、
ポリアミド、ポリカーボネート、ポリフェニレンオキシ
ド、ポリエチレンテレフタレート、ポリブチレンテレフ
タレート、ポリアリレート、ポリスルホン、ポリフェニ
レンスルフィド、ポリエーテルスルホン、ポリエーテル
エーテルケトン、ポリエーテルケトン、ポリエーテルイ
ミド、ポリアミドイミド、ポリイミド等が挙げられ、ま
た、熱硬化性樹脂としては、例えば、ホルムアルデヒド
樹脂、フェノール樹脂、アミノ樹脂、不飽和ポリエステ
ル樹脂、エポキシ樹脂、ジアリルフタレート樹脂、シリ
コーン、ポリウレタン、ポリアミノビスマレイミド樹脂
等が挙げられ、これらは単独あるいは二種以上のブレン
ド樹脂であってもよい。The resin to be injected, that is, the material of the resin molding portion 6 may be formed of either a thermoplastic resin or a thermosetting resin. Specifically, as the thermoplastic resin, For example, polyethylene, polypropylene, polymethylpentene, polybutene, polybutadiene, polystyrene, styrene-butadiene resin, polyvinyl chloride,
Polyvinyl acetate, polymethylmethacrylate, polyvinylidene chloride, polytetrafluoroethylene, AS resin,
ABS resin, polyacrylonitrile, polyacetal,
Polyamide, polycarbonate, polyphenylene oxide, polyethylene terephthalate, polybutylene terephthalate, polyarylate, polysulfone, polyphenylene sulfide, polyether sulfone, polyether ether ketone, polyether ketone, polyether imide, polyamide imide, polyimide and the like, also, Examples of the thermosetting resin include formaldehyde resin, phenol resin, amino resin, unsaturated polyester resin, epoxy resin, diallyl phthalate resin, silicone, polyurethane, polyamino bismaleimide resin, and the like, which may be used alone or in combination of two or more. It may be a blend resin.
【００３０】またこれらの樹脂は、繊維状補強材、例え
ば、ガラス繊維、炭素繊維、アラミド繊維、セラミック
ス繊維、金属繊維等を混合したものであってもよい。繊
維状補強材を混合した場合、本発明によれば、繊維配向
が図１の矢符Ｘ方向、即ち、樹脂成形部６の略中心部か
ら伝動接触面６Ａ方向に放射状に並ぶので高い伝動接触
面強度を得ることができる。Further, these resins may be a mixture of fibrous reinforcing materials such as glass fibers, carbon fibers, aramid fibers, ceramics fibers and metal fibers. When the fibrous reinforcing material is mixed, according to the present invention, the fiber orientation is arranged radially in the arrow X direction in FIG. 1, that is, from the substantially central portion of the resin molding portion 6 in the transmission contact surface 6A direction, so that high transmission contact is achieved. Surface strength can be obtained.
【００３１】[0031]
【発明の効果】本発明によれば、上記構成を有するの
で、樹脂注入時、樹脂注入ノズル先端の冷却した樹脂
が、スプール又はランナーの先端又は終端に形成されて
いるコールドスラグウェル部に入り込むことにより、金
型内に送り込まれることがなくなるため、樹脂成形部に
フローマークやショートショット等を生じさせて不良発
生の原因としたり、伝動接触面の強度を低下させたりす
るしたりすることがないので、得られる伝動部材は、伝
動接触面の強度が高く機械的強度及び部品的信頼性が向
上している。EFFECTS OF THE INVENTION According to the present invention, since it has the above-mentioned structure, at the time of resin injection, the cooled resin at the tip of the resin injection nozzle enters the cold slag well portion formed at the tip or end of the spool or runner. As a result, the resin is not fed into the mold, so that flow marks, short shots, etc. are not generated in the resin molding part, which does not cause defects, or the strength of the transmission contact surface is not reduced. Therefore, in the obtained transmission member, the strength of the transmission contact surface is high, and the mechanical strength and reliability of parts are improved.
【図１】インサート部材をセットした状態の金型を示す
概略断面図である。FIG. 1 is a schematic cross-sectional view showing a mold with an insert member set.
【図２】図１の金型によって得られた伝動部材の一例を
示す断面図である。FIG. 2 is a sectional view showing an example of a transmission member obtained by the mold of FIG.
【図３】本発明の成形方法によって得られる伝動部材の
他の例を示す断面図である。FIG. 3 is a cross-sectional view showing another example of the transmission member obtained by the molding method of the present invention.
【図４】本発明の成形方法によって得られる伝動部材の
他の例を示す断面図である。FIG. 4 is a cross-sectional view showing another example of the transmission member obtained by the molding method of the present invention.
【図５】本発明の成形方法によって得られる伝動部材の
他の例を示す断面図である。FIG. 5 is a cross-sectional view showing another example of the transmission member obtained by the molding method of the present invention.
【図６】本発明の成形方法によって得られる伝動部材の
他の例を示す断面図である。FIG. 6 is a cross-sectional view showing another example of the transmission member obtained by the molding method of the present invention.
【図７】従来の成形方法による伝動部材及び金型を示す
概略断面図である。FIG. 7 is a schematic cross-sectional view showing a transmission member and a mold according to a conventional molding method.
１ 金型 １Ａ，１Ｂ 割型 １Ｃ 金型スプールまたはランナー ２ キャビティー ３ 樹脂注入ノズル ４ インサート部材 ４Ａ 中空部（スプールまたはランナー） ４Ｂ 透孔部（ゲート） ４Ｃ コールドスラグウェル部 ４Ｄ 溝部 ５ 伝動部材 ６ 樹脂成形部 ６Ａ 伝動接触面 1 mold 1A, 1B split type 1C mold spool or runner 2 cavities 3 resin injection nozzle 4 Insert member 4A hollow part (spool or runner) 4B through hole (gate) 4C cold slag well section 4D groove 5 Transmission member 6 Resin molding part 6A Transmission contact surface
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｋ 105:12 105:20 Ｂ２９Ｌ 31:32 4Ｆ (72)発明者 茂呂 和夫 東京都八王子市東浅川町55番地 甲陽精密 株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical display location // B29K 105: 12 105: 20 B29L 31:32 4F (72) Inventor Kazuo Mororo East of Hachioji, Tokyo 55 Asakawacho Koyo Precision Co., Ltd.
Claims (2)
有するスプールまたはランナーが内部に形成されている
と共に、一ないし複数のゲートが成形後に樹脂によって
被覆される部分に形成されているインサート部材を用
い、該インサート部材のスプールまたはランナー及びゲ
ートを介して溶融状態の樹脂を金型内に送り込むことを
特徴とする伝動部材インサート成形方法。1. An insert member in which a spool or a runner having a cold slug well portion at the tip or the end is formed inside, and one or a plurality of gates are formed in a portion which is covered with resin after molding is used. A method for insert molding a transmission member, characterized in that a resin in a molten state is fed into a mold via a spool or a runner and a gate of the insert member.
を独立して成形することを特徴とする請求項１記載の伝
動部材インサート成形方法。2. The transmission member insert molding method according to claim 1, wherein two or more resin molding parts are independently molded around the insert member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20336091A JPH054255A (en) | 1991-03-20 | 1991-07-19 | Insert molding method of transmission member |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3-81671 | 1991-03-20 | ||
| JP8167191 | 1991-03-20 | ||
| JP20336091A JPH054255A (en) | 1991-03-20 | 1991-07-19 | Insert molding method of transmission member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH054255A true JPH054255A (en) | 1993-01-14 |
Family
ID=26422676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20336091A Pending JPH054255A (en) | 1991-03-20 | 1991-07-19 | Insert molding method of transmission member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH054255A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0957786A (en) * | 1995-08-18 | 1997-03-04 | Oob Kogyo Kk | Insert molding and molding thereof |
| JP2003512197A (en) * | 1999-10-18 | 2003-04-02 | スベンスカ・ロツタア・マスキナア・アクチボラグ | Method for manufacturing polymer rotor |
| WO2013017187A1 (en) * | 2011-07-29 | 2013-02-07 | Robert Bosch Gmbh | Gear shaft arrangement |
| CN109228209A (en) * | 2018-09-20 | 2019-01-18 | 昆山弘正电子科技有限公司 | The injection mold of router lower cover and the Shooting Technique of router lower cover |
| CN109228207A (en) * | 2018-09-20 | 2019-01-18 | 昆山弘正电子科技有限公司 | The injection mold of router upper cover and the Shooting Technique of router upper cover |
-
1991
- 1991-07-19 JP JP20336091A patent/JPH054255A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0957786A (en) * | 1995-08-18 | 1997-03-04 | Oob Kogyo Kk | Insert molding and molding thereof |
| JP2003512197A (en) * | 1999-10-18 | 2003-04-02 | スベンスカ・ロツタア・マスキナア・アクチボラグ | Method for manufacturing polymer rotor |
| WO2013017187A1 (en) * | 2011-07-29 | 2013-02-07 | Robert Bosch Gmbh | Gear shaft arrangement |
| CN109228209A (en) * | 2018-09-20 | 2019-01-18 | 昆山弘正电子科技有限公司 | The injection mold of router lower cover and the Shooting Technique of router lower cover |
| CN109228207A (en) * | 2018-09-20 | 2019-01-18 | 昆山弘正电子科技有限公司 | The injection mold of router upper cover and the Shooting Technique of router upper cover |
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