JPH066299B2 - Distribution rotor and its molding method - Google Patents
Distribution rotor and its molding methodInfo
- Publication number
- JPH066299B2 JPH066299B2 JP61142631A JP14263186A JPH066299B2 JP H066299 B2 JPH066299 B2 JP H066299B2 JP 61142631 A JP61142631 A JP 61142631A JP 14263186 A JP14263186 A JP 14263186A JP H066299 B2 JPH066299 B2 JP H066299B2
- Authority
- JP
- Japan
- Prior art keywords
- distribution rotor
- resin material
- mold
- rotor
- cooling
- 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 - Lifetime
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
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は例えば内燃機関点火用配電器の配電ロータ部
を樹脂成形する方法ならびにその成形物に関するもので
ある。Description: TECHNICAL FIELD The present invention relates to, for example, a method of resin-molding a distribution rotor portion of an internal combustion engine ignition distributor, and a molded product thereof.
第５図は一般的な内燃機関点火用配電器を示す断面図で
あり、図において(1)は内燃機関（図示せず）に同期し
て回転されるシヤフト、(2)は遠心進角機構、(3)は真空
進角機構、(4)はシヤフト(1)に対して進角機構(2)によ
り進角制御されて回転される進角スリーブ、(5)は進角
スリーブ(4)に取り付けられた配電ロータ、（５Ａ）時
は配電ロータ(5)に設けられたロータ電極、(6)は配電キ
ヤツプに取り付けられて配電ロータ(5)のロータ電極
（５Ａ）に高電圧を供給する中心電極、(7)は配電キヤ
ツプに取り付けられて配電ロータ(5)の周辺に位置する
周辺電極である。FIG. 5 is a sectional view showing a general internal combustion engine ignition distributor. In the figure, (1) is a shaft which is rotated in synchronization with an internal combustion engine (not shown), and (2) is a centrifugal advance mechanism. , (3) is a vacuum advance mechanism, (4) is an advance sleeve that is rotated by the advance mechanism (2) with respect to the shaft (1), and (5) is an advance sleeve (4). A distribution rotor attached to the power distribution rotor, a rotor electrode provided on the distribution rotor (5) when (5A), and a high voltage applied to the rotor electrode (5A) of the distribution rotor (5) attached to the distribution cap. The central electrode (7) is a peripheral electrode attached to the distribution cap and located around the distribution rotor (5).
中心電極(6)は配電ロータ(5)のロータ電極（５Ａ）に対
接して、回転する配電ロータ(5)と共に回転するロータ
電極（５Ａ）に高電圧を供給する。かかる高電圧を供給
されたロータ電極（５Ａ）はその回転につれて周辺電極
(7)に高電圧を配電するようになつている。The center electrode (6) contacts the rotor electrode (5A) of the distribution rotor (5) and supplies a high voltage to the rotor electrode (5A) that rotates together with the rotating distribution rotor (5). As the rotor electrode (5A) supplied with such a high voltage rotates, it rotates the peripheral electrode.
High voltage is distributed to (7).
さて、その配電ロータ(5)は単に樹脂材を射出成形され
たもので第６図に示す射出成形物である。The distribution rotor (5) is an injection-molded product shown in FIG. 6, which is simply a resin material injection-molded.
上記のような従来の射出成形物である配電ロータ(5)は
第７図に示す如く、その内部にボイド(8)を含んでい
る。このボイドは、射出成形後、樹脂のヒケ（冷却によ
る肉厚の収縮）等により厚肉部に発生する空洞である。
ところで一般に配電ロータは、一方で内燃機関点火用高
電圧が印加される高圧電極（中心電極(6)、ロータ電極
(5A)）と対向し、更に他方で接地電位の金属部材（進角
スリーブ(4)（進角スリーブ(4)はシャフト(1)を介して
機関に電気的に接続されることになり、接地電位とな
る））と対向している。このため、配電ロータに加わる
電位差は非常に大きなものとなる。The distribution rotor (5), which is a conventional injection-molded product as described above, includes a void (8) in its interior, as shown in FIG. The voids are cavities that are generated in the thick portion due to sink marks of resin (thickness shrinkage due to cooling) after injection molding.
By the way, in general, a power distribution rotor is a high-voltage electrode (center electrode (6), rotor electrode
(5A)), and the other side is a metal member of ground potential (advancing sleeve (4) (advancing sleeve (4) is electrically connected to the engine via the shaft (1), It becomes the ground potential)). Therefore, the potential difference applied to the distribution rotor becomes very large.
従って、配電ロータ(5)の、上記高圧電極に対向する部
分にボイド(8)が発生すると、樹脂の耐電圧寿命が低下
し、最悪の場合には進角スリーブ(4)を介してリークを
生じ、充分な点火エネルギーが得られず、機関が失火状
態となるという致命的な障害を生じ、信頼性に欠けると
いう問題点があった。Therefore, if a void (8) occurs in the portion of the power distribution rotor (5) that faces the high-voltage electrode, the withstand voltage life of the resin will decrease, and in the worst case, leakage will occur via the advance sleeve (4). However, there is a problem in that sufficient ignition energy cannot be obtained, a fatal obstacle occurs that the engine is in a misfire state, and reliability is poor.
この発明は、かかる問題点を解決するためになされたも
ので、配電ロータの耐電圧部にボイドを発生させないよ
うにした成形方法およびこの方法により成形された成形
物を得ることを目的とする。The present invention has been made to solve such a problem, and an object of the present invention is to obtain a molding method in which voids are not generated in the withstand voltage portion of the distribution rotor and a molded product molded by this method.
この発明に係る配電ロータおよびその成形方法は、配電
ロータの高圧電極と対向する所定部分が部分的に加圧さ
れてこの所定部分におけるボイドが除去されていること
によって上記問題点を解決する。The distribution rotor and the molding method therefor according to the present invention solve the above-mentioned problems by partially pressurizing a predetermined portion of the power distribution rotor facing the high-voltage electrode to remove voids in the predetermined portion.
この発明においては、配電ロータの高圧電極と対向する
所定部分が部分的に加圧状態に維持されて冷却されるた
めに、この所定部分にボイドが発生しない。In the present invention, the predetermined portion of the distribution rotor facing the high-voltage electrode is partially maintained in the pressurized state and cooled, so that no void is generated in this predetermined portion.
第１図乃至第４図はこの発明の一実施例を示す断面図で
あり、第１図は配電ロータの射出成形物を示し、第２図
は型内に注入されただけで加圧されていない状態（実線
図示）と、所定部分を部分的に加圧された状態（点線図
示）、即ち冷却後の成形物とを示し、第３図は所定部分
の加圧前の状態を拡大して示し、第４図は所定部分の加
圧状態を拡大して示す図であり、(5)は配電ロータの射
出成形物（この外観は第６図に示すものと全く同じ）、
(9)は所定部分を加圧するために一時的に存在する凸
部、（１０）は型の半体、（１１）は型の反体、（１
２）は型の半体（１０）の一部であつてこれに対して可
動である部分である。1 to 4 are cross-sectional views showing an embodiment of the present invention, FIG. 1 shows an injection molded article of a distribution rotor, and FIG. 2 is only injected into a mold and pressurized. Fig. 3 shows a state in which there is no pressure (shown by a solid line) and a state in which a predetermined portion is partially pressed (shown by a dotted line), that is, a molded product after cooling. FIG. 4 is an enlarged view showing a pressurized state of a predetermined portion, and (5) is an injection molded product of a distribution rotor (this appearance is exactly the same as that shown in FIG. 6),
(9) is a convex portion that is temporarily present to pressurize a predetermined portion, (10) is a mold half body, (11) is a mold inverse body, and (1)
2) is a part of the mold half (10) which is movable relative to it.
さて、型の半体（１０）の可動部分（１２）を第３図の
状態に維持して、（１０），（１１）で形成された型内
に樹脂材を注入する。この注入完了状態で樹脂材は第３
図に示す如く型内に充満する。この注入工程が完了する
と、樹脂材の硬化前に型の半体（１０）の可動部分（１
２）を第４図の如く移動させ、凸部(9)の樹脂材を更に
型内に繰り込む。これによって配電ロータ(5)の耐電圧
部を加圧し（かくして第６図に示す如きボイド(8)は消
滅する）、第４図の状態を維持して樹脂材を冷却、硬化
する。このようにして出来た成形物の絶縁能力は従来の
ものに比較して一実験値として約３倍あることが判つ
た。Now, while maintaining the movable part (12) of the mold half (10) in the state of FIG. 3, a resin material is injected into the mold formed by (10) and (11). When this injection is completed, the resin material is the third
Fill the mold as shown. Upon completion of this injection step, the moving parts (1) of the mold half (10) are cured before the resin material is cured.
2) is moved as shown in FIG. 4, and the resin material of the convex portion (9) is further fed into the mold. As a result, the withstand voltage portion of the power distribution rotor (5) is pressurized (thus eliminating the void (8) as shown in FIG. 6), and the resin material is cooled and hardened while maintaining the state of FIG. It was found that the insulating ability of the thus-formed molding was about three times as an experimental value as compared with the conventional one.
なお、この実施例では型の半体（１０）の可動部分（１
２）はエジエクタピンをも兼ねており、冷却完了後に成
形物を型より放出させる。In this embodiment, the movable part (1) of the mold half (10) is
2) also functions as an ediectapine, and releases the molded product from the mold after cooling is completed.
この発明は以上説明したとおり、樹脂材を成形してなる
配電ロータのうちで特にボイドを嫌う部分、すなわち高
圧電極と対向する所定部分を成形時に部分圧縮しつつ冷
却することによりボイドの発生を防止し、かくして高密
度の成形物を提供できる効果がある。このことは応力歪
に対して強度の高い成形物を提供できる効果をも有す
る。As described above, the present invention prevents generation of voids by partially compressing and cooling a portion of the power distribution rotor formed by molding a resin material that does not particularly require voids, that is, a predetermined portion facing the high voltage electrode while molding. Thus, there is an effect that a high-density molded product can be provided. This also has the effect of providing a molded product having high strength against stress strain.
またこのようにして成形された配電ロータは、高圧電極
部とアース間の樹脂部にボイドが存在しないために、樹
脂の耐電圧寿命が延びるという効果がある。かつ絶縁能
力は従来のものに比較して高く、従って機関の失火を防
止し、高信頼性を得るという効果がある。In addition, since the distribution rotor molded in this manner has no voids in the resin portion between the high-voltage electrode portion and the ground, it has the effect of extending the withstand voltage life of the resin. Moreover, the insulation ability is higher than that of the conventional one, and therefore, there is an effect of preventing misfire of the engine and obtaining high reliability.
第１図は本発明の配電ロータを示す断面図、第２図は中
間段階での配電ロータを示す断面図、第３図は本発明の
方法を説明するための図、第４図は第３図に続く成形段
階を示す図、第５図は一般的なデイストリビユータを示
す断面図、第６図は従来の配電ロータの状態を示す断面
図、第７図は第６図の円部分に相当する箇所の拡大図で
ある。 図において、(5)は配電ロータ、(9)は凸部、（10），
（１１）は型の半体、（１２）は型の半体(10)の可動部
分である。 なお、各図中同一符号は同一または相当部分を示す。FIG. 1 is a sectional view showing a distribution rotor of the present invention, FIG. 2 is a sectional view showing a distribution rotor in an intermediate stage, FIG. 3 is a diagram for explaining the method of the present invention, and FIG. 5 is a sectional view showing a general distributor, FIG. 6 is a sectional view showing a state of a conventional distribution rotor, and FIG. 7 is a circle portion in FIG. It is an enlarged view of a corresponding part. In the figure, (5) is a distribution rotor, (9) is a convex portion, (10),
(11) is a mold half, and (12) is a movable part of the mold half (10). In the drawings, the same reference numerals indicate the same or corresponding parts.
フロントページの続き (72)発明者 後藤 利彦 兵庫県姫路市千代田町840番地 三菱電機 株式会社姫路製作所内 (56)参考文献 特開 昭58−179625（ＪＰ，Ａ)Front page continuation (72) Inventor Toshihiko Goto 840 Chiyoda-cho, Himeji-shi, Hyogo Mitsubishi Electric Corporation Himeji Manufacturing Co., Ltd. (56) Reference JP-A-58-179625 (JP, A)
Claims (3)
却し、その後成形物を型抜きされて成形される配電ロー
タであって、樹脂材を型内に注入した後樹脂材の冷却が
完了するまで、前記配電ロータの高圧電極と対向する所
定部分が部分的に加圧されてこの所定部分におけるボイ
ドが除去されていることを特徴とする配電ロータ。1. A distribution rotor in which a resin material is injected into a mold, then the resin material is cooled, and then a molded product is die-cut and molded, wherein the resin material is injected into the mold. A distribution rotor characterized in that a predetermined portion of the distribution rotor facing the high-voltage electrode is partially pressurized to remove voids in the predetermined portion until cooling is completed.
脂材を冷却する冷却工程、及び前記冷却工程後に成形物
を型抜きする型抜き工程からなる配電ロータの成形方法
において、前記注入工程後、前記冷却工程終了まで前記
配電ロータの高圧電極と対向する所定部分を部分的に加
圧し、その加圧状態を維持する工程を含むことを特徴と
する配電ロータの成形方法。2. A method of molding a distribution rotor, comprising: an injection step of injecting a resin material into a mold, a cooling step of cooling the resin material, and a die cutting step of demolding a molded product after the cooling step. After the step, a step of partially pressurizing a predetermined portion of the power distribution rotor facing the high-voltage electrode until the end of the cooling step, and maintaining the pressed state is included.
この可動部分の移動により部分的に加圧しその加圧状態
を維持する特許請求の範囲第２項記載の配電ロータの成
形方法。3. The molding of a power distribution rotor according to claim 2, wherein a part of the mold facing the predetermined part is made movable, and the movable part is partially pressed to maintain the pressed state. Method.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61142631A JPH066299B2 (en) | 1986-06-17 | 1986-06-17 | Distribution rotor and its molding method |
| KR1019870004294A KR900007325B1 (en) | 1986-06-17 | 1987-05-01 | Method for molding resin molded item and molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61142631A JPH066299B2 (en) | 1986-06-17 | 1986-06-17 | Distribution rotor and its molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62297118A JPS62297118A (en) | 1987-12-24 |
| JPH066299B2 true JPH066299B2 (en) | 1994-01-26 |
Family
ID=15319835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61142631A Expired - Lifetime JPH066299B2 (en) | 1986-06-17 | 1986-06-17 | Distribution rotor and its molding method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH066299B2 (en) |
| KR (1) | KR900007325B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2527303Y2 (en) * | 1991-04-09 | 1997-02-26 | 東光電気株式会社 | Pressurizing equipment for molded resin products |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58179625A (en) * | 1982-04-15 | 1983-10-20 | Nippon Denso Co Ltd | Void eliminating method and equipment in injection molding |
-
1986
- 1986-06-17 JP JP61142631A patent/JPH066299B2/en not_active Expired - Lifetime
-
1987
- 1987-05-01 KR KR1019870004294A patent/KR900007325B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| KR880000205A (en) | 1988-03-24 |
| KR900007325B1 (en) | 1990-10-08 |
| JPS62297118A (en) | 1987-12-24 |
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