JPH04194366A - Manufacture of distributor cap - Google Patents
Manufacture of distributor capInfo
- Publication number
- JPH04194366A JPH04194366A JP32283890A JP32283890A JPH04194366A JP H04194366 A JPH04194366 A JP H04194366A JP 32283890 A JP32283890 A JP 32283890A JP 32283890 A JP32283890 A JP 32283890A JP H04194366 A JPH04194366 A JP H04194366A
- Authority
- JP
- Japan
- Prior art keywords
- distributor cap
- distributor
- manufacture
- polypropylene
- heat resistance
- 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
- Ignition Installations For Internal Combustion Engines (AREA)
- Reinforced Plastic Materials (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ディストリビュータキャップに係り耐熱性、
剛性及び表面硬度、耐クリープ性を大巾に改良したディ
ストリビュータキャップの製造方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a distributor cap that has heat resistance,
This invention relates to a method for manufacturing a distributor cap that has greatly improved rigidity, surface hardness, and creep resistance.
従来のディストリビュータキャップは、電気絶縁性の高
いこと及び耐熱性を重要視して、無機充填剤を配合した
ポリプロピレンやポリブチレンテレフタレート等の熱可
塑性樹脂が用いられてきた。Conventional distributor caps have been made of thermoplastic resins such as polypropylene and polybutylene terephthalate mixed with inorganic fillers, with emphasis placed on high electrical insulation and heat resistance.
これら従来の技術に係わるディストリビュータキャップ
は、従来の火花点火式内燃機関の一般的な使用条件にお
ける電気＃！縁性や耐熱性に関する要求を満してきた。Distributor caps related to these conventional technologies can be used under the general operating conditions of conventional spark ignition internal combustion engines. It has met the requirements regarding affinity and heat resistance.
上記従来技術に用いていた樹脂は主として、ポリプロピ
レンやポリブチレンテレフタレートが用いられており、
市場においても十分な突稜がある。The resins used in the above conventional technology are mainly polypropylene and polybutylene terephthalate.
There are enough ridges in the market.
しかし、最近の自動車技術の進歩により、更に高温に耐
える樹脂が必要となった。However, recent advances in automobile technology have created a need for resins that can withstand even higher temperatures.
本発明の目的は、材料で上記要求を満足し、ディストリ
ビュータキャップの寿命を延長し、信頼性のあるディス
トリビュータキャップを得ることを目的とする。The object of the present invention is to obtain a distributor cap that satisfies the above requirements with a material, extends the life of the distributor cap, and is reliable.
（課題を解決するための手段〕
上記目的を達成するため、高結晶化ポリプロピレンを用
いてディストリビュータキャップを成形したものである
。これにより、裕度のある、耐熱性、剛性、表面硬度、
耐クリープの良好なディストリビュータキャップを得る
ことが出来る。(Means for Solving the Problems) In order to achieve the above object, the distributor cap is molded using highly crystallized polypropylene.As a result, it has a high tolerance for heat resistance, rigidity, surface hardness,
A distributor cap with good creep resistance can be obtained.
高結晶化ポリプロピレンは、従来のポリプロピレンに比
べ１割程度結晶化度が高い。そのため、耐熱性は１１０
°が１３５℃に向上し、剛性も６０％位向上する。更に
無機充填度が高くなり、傷がつきにくくなる。Highly crystalline polypropylene has a degree of crystallinity about 10% higher than that of conventional polypropylene. Therefore, the heat resistance is 110
The temperature is improved to 135°C, and the rigidity is also improved by about 60%. Furthermore, the degree of inorganic filling increases, making it less likely to be scratched.
以下、本発明の一実施例をより具体的に説明するが、本
発明はこれら実施例に限定されるものではない。Hereinafter, one example of the present invention will be described in more detail, but the present invention is not limited to these examples.
実施例１〜３及び比較例１
第１表に示した実施例は各々ディストリビュータキャッ
プの成形用樹脂として高結晶化ポリプロピレンを用い、
補強剤としてガラス繊維及びタルク、ケイ酸カルシウム
を配合した樹脂組成物を用いた実施例である。第１表に
示した比較例はディストリビュータキャップの成形用樹
脂としてポリプロピレンにタルクを補強剤として配合し
た樹脂組成物を比較例として示した。補強剤としての配
合量は、実施例の場合、樹脂の補強効果を期待して成形
時の作業が十分に可能な限界迄増量して配合した。比較
例においては、従来の突稜のある配合量に固定して配合
した。〜成形法は、従来の熱可塑性樹脂を成形した射出
成形機を用いて成形した。Examples 1 to 3 and Comparative Example 1 In each of the examples shown in Table 1, highly crystallized polypropylene was used as the molding resin for the distributor cap,
This example uses a resin composition containing glass fiber, talc, and calcium silicate as reinforcing agents. The comparative example shown in Table 1 is a resin composition in which polypropylene is blended with talc as a reinforcing agent as a molding resin for a distributor cap. In the case of the examples, the amount of the reinforcing agent was increased to the limit that would allow sufficient work during molding in anticipation of the reinforcing effect of the resin. In the comparative example, the blending amount was fixed at the conventional ridged blending amount. ~The molding method was performed using a conventional injection molding machine that molded thermoplastic resin.
実施例１〜３の樹脂組成物を用いたディストリビュータ
キャップは高温耐久試験を実施した後でも、いずれもク
ラック破損などの異常現象が全たく認められず、更に金
属による傷もつきにくいことが判明し、極めて良好な結
果が得られた。こ九らに対し、比較例の樹脂組成物を用
いたディストリビュータキャップは、金属による傷もつ
き易く剛性、耐熱ともに実施例１〜３樹脂組成物より低
くかった。Even after high-temperature durability tests were conducted on the distributor caps using the resin compositions of Examples 1 to 3, it was found that no abnormal phenomenon such as cracking or damage was observed in any of them, and that they were also less likely to be scratched by metal. Very good results were obtained. In contrast, the distributor caps using the resin compositions of Comparative Examples were easily scratched by metal and had lower rigidity and heat resistance than the resin compositions of Examples 1 to 3.
本発明によれば、高結晶化のため、耐熱性及び剛性が向
上し更に表面硬度が高く傷がつきにくくなる効果があり
、ディストリビュータの寿命及び信頼性を向上させる効
果がある。According to the present invention, due to the high crystallization, the heat resistance and rigidity are improved, and the surface hardness is high, making it difficult to get scratched, thereby improving the life span and reliability of the distributor.
Claims (1)
ップにおいて、高耐圧絶縁体樹脂として高結晶化性ポリ
プロピレンを用いたことを特徴とするディストリビュー
タキャップの製造方法。1. A method for producing a distributor cap, characterized in that the distributor cap is made of a high-voltage insulating resin and uses highly crystallized polypropylene as the high-voltage insulating resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32283890A JPH04194366A (en) | 1990-11-28 | 1990-11-28 | Manufacture of distributor cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32283890A JPH04194366A (en) | 1990-11-28 | 1990-11-28 | Manufacture of distributor cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04194366A true JPH04194366A (en) | 1992-07-14 |
Family
ID=18148173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32283890A Pending JPH04194366A (en) | 1990-11-28 | 1990-11-28 | Manufacture of distributor cap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04194366A (en) |
-
1990
- 1990-11-28 JP JP32283890A patent/JPH04194366A/en active Pending
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