JP2805807B2 - Composite ground electrode for spark plug and method of manufacturing the same - Google Patents
Composite ground electrode for spark plug and method of manufacturing the sameInfo
- Publication number
- JP2805807B2 JP2805807B2 JP1077513A JP7751389A JP2805807B2 JP 2805807 B2 JP2805807 B2 JP 2805807B2 JP 1077513 A JP1077513 A JP 1077513A JP 7751389 A JP7751389 A JP 7751389A JP 2805807 B2 JP2805807 B2 JP 2805807B2
- Authority
- JP
- Japan
- Prior art keywords
- covering member
- composite
- plug
- ground electrode
- mounting bracket
- 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
- 239000002131 composite material Substances 0.000 title claims description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 29
- 238000005260 corrosion Methods 0.000 claims description 22
- 230000007797 corrosion Effects 0.000 claims description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 238000001125 extrusion Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000000641 cold extrusion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Forging (AREA)
- Spark Plugs (AREA)
Description
【発明の詳細な説明】 「産業上の利用分野」 本発明は、点火プラグの複合接地電極の製造方法に関
し、詳しくは熱伝導度の高い金属によってなる芯部材と
該芯部材を覆う耐食性の金属によってなる被覆部材を備
える点火プラグの複合接地電極及びその製造方法に関す
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a composite ground electrode for a spark plug, and more particularly, to a core member made of a metal having high thermal conductivity and a corrosion-resistant metal covering the core member. And a method of manufacturing the same.
「従来の技術」 従来、この種の複合電極の製造方法として、例えば特
開昭53−132628号に開示されるような、耐食性の金属に
よってなり、その一端に開口した穴を設けられたカップ
状の被覆部材に、熱伝導度の高い金属によってなる棒状
のコア部材を嵌合した後接合して前記コア部材が露出し
た複合体となし、該複合体を冷間押出し加工により成形
する方法があった。2. Description of the Related Art Conventionally, as a method of manufacturing a composite electrode of this type, for example, as disclosed in JP-A-53-132628, a cup-shaped member made of a corrosion-resistant metal and provided with a hole opened at one end thereof There is a method in which a rod-shaped core member made of a metal having a high thermal conductivity is fitted to the covering member and joined to form a composite in which the core member is exposed, and the composite is formed by cold extrusion. Was.
しかしながら上記の方法により得られた複合電極で
は、コア部材が耐食性の金属によってなる被覆部材に完
全には包囲されず、電極の一端に露出しているので、接
地電極として用いるには耐食性が充分でなく、また点火
プラグの取付金具に溶接した際に、露出したコア部材と
取付金具とが接合されることになり、その接合部におい
て充分な強度が得られないという問題点があった。However, in the composite electrode obtained by the above method, the core member is not completely surrounded by the coating member made of the corrosion-resistant metal and is exposed at one end of the electrode, so that the corrosion resistance is sufficient for use as a ground electrode. In addition, when being welded to the mounting bracket of the ignition plug, the exposed core member and the mounting bracket are joined, and there is a problem that sufficient strength cannot be obtained at the joint.
また、特公昭63−49356号に開示された複合電極の製
造方法によれば、耐食性の金属によってなりその一端に
開口した穴を設けられたカップ状の被覆部材に、熱伝導
度の高い金属によってなる円柱状のコア部材を、その露
出側端面が前記被覆部材の開口部端面よりも凹むように
挿入して複合体となし、該複合体を押出し加工し、さら
に被覆部材をその開端において、該開端よりも凹んでい
るコア部材を包囲するように塑性加工するものであっ
た。このようにすれば、接地電極として用いる場合、点
火プラグの取付金具に溶接されるのはコア部材でなく被
覆部材であるようにすることができた。According to the method for manufacturing a composite electrode disclosed in Japanese Patent Publication No. 63-49356, a cup-shaped covering member made of a corrosion-resistant metal and provided with a hole opened at one end is provided with a metal having a high thermal conductivity. A cylindrical core member is formed by inserting the exposed end surface of the core member so as to be recessed from the opening end surface of the covering member to form a composite, extruding the composite, and further covering the covering member at its open end. The plastic working is performed so as to surround the core member that is recessed from the open end. In this way, when used as a ground electrode, it is possible to weld not the core member but the cover member to the fitting of the ignition plug.
しかしながら上記の方法によれば、コア部材を被覆部
材によって包囲させる工程を備えるために、従来の押出
し型とは別の金型および塑性加工を行う装置が必要にな
るという問題点があった。However, according to the above method, there is a problem that a mold and a device for performing plastic working different from the conventional extrusion die are required in order to provide a step of surrounding the core member with the covering member.
また、一般にニッケルにクロムあるいはアルミニウム
等を添加することにより耐食性は向上するが、逆に溶接
性はニッケルの純度が低下するのにつれて悪化するとい
うように、耐食性と溶接性とは相反することがあり、上
記の方法によれば、電極の被覆部材の一部が取付金具に
接合されるのであって、運転状態において最も高温にさ
らされ耐食性が要求される先端と、取付金具との溶接性
の良さが要求される取付部とが同一の材質であるから、
耐食性と溶接性とを両立させることができないという問
題点があった。In general, corrosion resistance is improved by adding chromium or aluminum to nickel, but conversely, corrosion resistance and weldability may be contradictory, as weldability deteriorates as nickel purity decreases. According to the above-described method, a part of the electrode covering member is joined to the mounting bracket, and the tip which is exposed to the highest temperature and is required to have corrosion resistance in the operating state and the weldability of the mounting bracket are good. Is required to be made of the same material,
There was a problem that it was not possible to achieve both corrosion resistance and weldability.
「発明が解決しようとする課題」 本発明は以上述べたような問題点に鑑みてなされたも
のであり、その第１の課題とするところは、従来の押出
し型を使用して、コア部材が被覆部材から露出せず、複
合接地電極の取付部と取付金具とが十分な接合強度を持
つような点火プラグの複合接地電極の製造方法を提供す
ることである。"Problems to be Solved by the Invention" The present invention has been made in view of the above-described problems, and the first problem is that a core member is formed using a conventional extrusion die. An object of the present invention is to provide a method for manufacturing a composite ground electrode of a spark plug in which the mounting portion of the composite ground electrode and the mounting metal have sufficient bonding strength without being exposed from the covering member.
また、本発明の第２の課題とするところは、複合接地
電極において耐食性と取付金具への溶接性との両立を実
現することである。A second object of the present invention is to achieve both corrosion resistance and weldability to a mounting bracket in a composite ground electrode.
「課題を解決するための手段および作用」 本発明は、上記第１及び第２の課題を解決するため、
以下の技術的手段を採用する。"Means and Actions for Solving the Problem" The present invention has been made in order to solve the first and second problems.
The following technical measures are adopted.
すなわち、請求項１記載の発明によれば、耐食性の金
属によってなりその一端に開口した穴を設けられたカッ
プ状の被覆部材を成形する工程と、被覆部材よりも熱伝
導度の高い金属によってなり被覆部材の穴に嵌合するコ
ア部材と、取付金具に対する溶接性が被覆部材よりも優
れた金属によってなり被覆部材の穴に嵌合する栓部材と
をそれぞれ成形する工程と、コア部材と栓部材とを接合
する工程と、その接合されたコア部材と栓部材とを被覆
部材の穴に挿入後接合してコア部材が内部に密封された
複合体となす工程と、その複合体を所定の寸法形状に押
出し成形する工程と、を備えることを特徴とする。That is, according to the first aspect of the present invention, a step of forming a cup-shaped covering member made of a corrosion-resistant metal and having a hole opened at one end thereof, and a step of forming a metal having a higher thermal conductivity than the covering member. Forming a core member fitted into the hole of the covering member, and a plug member made of metal having better weldability to the mounting bracket than the covering member and fitting into the hole of the covering member; And a step of inserting the joined core member and plug member into the hole of the covering member and joining them to form a composite in which the core member is sealed inside, and sizing the composite to a predetermined size. Extruding into a shape.
このように、本発明によれば、熱伝導度の高い金属に
よってなるコア部材と、該コア部材に接合された栓部材
とがカップ状の被覆部材に挿入されているので、従来通
りの押出し加工によって、一端にコア部材が露出しない
複合接地電極が得られる。As described above, according to the present invention, since the core member made of a metal having high thermal conductivity and the plug member joined to the core member are inserted into the cup-shaped covering member, the conventional extrusion process is performed. Thereby, a composite ground electrode in which the core member is not exposed at one end is obtained.
また、その被覆部材と栓部材とは別部品であって、そ
れぞれ用途に応じた材質が選択可能であり、本発明で
は、被覆部材は耐食性の金属、栓部材は取付金具に対す
る溶接性が被覆部材よりも優れた金属を用いるから、栓
部材と取付金具とが十分な接合強度を持つため優れた溶
接性を実現するとともに、耐食性をも兼ね備えた点火プ
ラグの複合接地電極の製造方法を提供できる。In addition, the covering member and the plug member are separate parts, and a material according to each application can be selected. In the present invention, the covering member is a corrosion-resistant metal, and the plug member has a weldability with respect to the mounting bracket. Since a superior metal is used, the plug member and the mounting bracket have sufficient joining strength to achieve excellent weldability, and provide a method for manufacturing a composite ground electrode of a spark plug that also has corrosion resistance.
また、請求項２記載の発明においては、取付金具に溶
接される栓部材の材質が、取付金具に対する溶接性が被
覆部材よりも優れた金属によってなる点火プラグの複合
接地電極であることを特徴とする。Further, the invention according to claim 2 is characterized in that the material of the plug member welded to the mounting bracket is a composite ground electrode of a spark plug made of a metal having better weldability to the mounting bracket than the covering member. I do.
それによって、被覆部材においては良好な耐食性を確
保し、栓部材においては取付金具に対する良好な溶接性
を確保できる。すなわち、耐食性と取付金具への溶接性
との両立を実現する複合接地電極を提供できる。Thereby, good corrosion resistance can be secured in the covering member, and good weldability to the mounting bracket can be secured in the plug member. That is, it is possible to provide a composite ground electrode that achieves both corrosion resistance and weldability to the mounting bracket.
「実施例」 以下本発明の実施例につき図面を参照して説明する。"Example" Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図は被覆部材を示す断面図である。被覆部材１
は、耐食性の金属によってなる。この耐食性の金属は、
例えばニッケルに、溶接性の良否には関係なく、耐食性
の向上に充分な量のクロムあるいはアルミニウム等が添
加されたものである。そして被覆部材１は、後方押出し
加工等の図示しない塑性加工手段によりその一端に開口
した穴1aを設けられたカップ状に成形されている。FIG. 1 is a sectional view showing a covering member. Covering member 1
Is made of a corrosion-resistant metal. This corrosion resistant metal
For example, nickel is obtained by adding chromium, aluminum, or the like in an amount sufficient for improving corrosion resistance, regardless of the weldability. The covering member 1 is formed into a cup shape provided with a hole 1a opened at one end thereof by plastic working means (not shown) such as backward extrusion.
第２図はコア部材と栓部材とを示す断面図である。コ
ア部材２は、例えば銅等の熱伝導度の高い金属によって
なり、被覆部材の穴1aの内径寸法にほぼ等しい外径寸法
を有する円柱状に形成されている。栓部材３は、例えば
純度の高いニッケル等の良溶接性金属によってなり、被
覆部材１の穴1aの内径寸法にほぼ等しい外径寸法を有す
る円柱状に形成されている。これらコア部材と栓部材の
高さ寸法の和が、被覆部材の穴1aの深さ寸法に略等しく
なっている。FIG. 2 is a sectional view showing a core member and a plug member. The core member 2 is made of a metal having high thermal conductivity such as copper, for example, and is formed in a cylindrical shape having an outer diameter substantially equal to the inner diameter of the hole 1a of the covering member. The plug member 3 is made of a highly weldable metal such as high-purity nickel, for example, and is formed in a cylindrical shape having an outer diameter substantially equal to the inner diameter of the hole 1 a of the covering member 1. The sum of the heights of the core member and the plug member is substantially equal to the depth of the hole 1a of the covering member.
第３図はコア部材２と栓部材３とが接合された状態を
示す断面図である。コア部材２と栓部材３とは、ろう付
け等により接合されている。FIG. 3 is a sectional view showing a state where the core member 2 and the plug member 3 are joined. The core member 2 and the plug member 3 are joined by brazing or the like.
第４図は接合されたコア部材２と栓部材３とを被覆部
材１に挿入し、接合して複合体４となした状態を示す断
面図である。このとき被覆部材１の穴1aの開口側に栓部
材３が配設され、内部側にコア部材２が配設され、穴1a
の開口側において被覆部材１の端面と、露出した栓部材
３の端面とはほぼ同一面をなしている。そしてコア部材
２と被覆部材１との接触部、および栓部材３と被覆部材
１との接触部を介して通電し、ジュール熱を発生させて
前記接触部を軟化させ、その軟化した接触部をさらに加
圧変形させて接合する。このようにしてコア部材2,栓部
材3,そして被覆部材１が互いに接合されて一体化し、複
合体４となる。FIG. 4 is a cross-sectional view showing a state where the joined core member 2 and plug member 3 are inserted into the covering member 1 and joined to form the composite 4. At this time, the plug member 3 is provided on the opening side of the hole 1a of the covering member 1, the core member 2 is provided on the inner side, and the hole 1a is provided.
The end face of the covering member 1 and the exposed end face of the plug member 3 are substantially flush with each other on the opening side. Then, electricity is supplied through a contact portion between the core member 2 and the covering member 1 and a contact portion between the plug member 3 and the covering member 1 to generate Joule heat to soften the contact portion. Further, they are deformed under pressure and joined. In this way, the core member 2, the plug member 3, and the covering member 1 are joined together and integrated to form the composite 4.
第５図は、前記複合体４を押出し加工した状態を示す
断面図である。第４図に示す複合体４は、図示しない押
出し型内に挿入された後加圧され、冷間押出し加工がな
される。この押出し型および冷間押出し加工手段は、特
公昭53−132628号に開示されたものと同一である。FIG. 5 is a sectional view showing a state where the composite 4 is extruded. The composite 4 shown in FIG. 4 is inserted into an extrusion die (not shown) and then pressurized to perform cold extrusion. The extrusion die and the cold extrusion processing means are the same as those disclosed in JP-B-53-132628.
第６図は押出し加工後の複合体４を所定の寸法に切断
して複合接地電極５となした状態を示す断面図である。
切断後の開口部5aには栓部材３が露出し、コア部材２は
内部に密封されている。FIG. 6 is a cross-sectional view showing a state where the composite 4 after extrusion processing is cut into a predetermined size to form a composite ground electrode 5.
The plug member 3 is exposed at the opening 5a after cutting, and the core member 2 is sealed inside.
第７図は曲げ成形された複合接地電極５を点火プラグ
６の取付金具７に溶接した状態を示す断面図である。こ
こで取付金具７は周知の如く鉄系金属からなる。複合接
地電極５の取付金具７に対する溶接部5cの強度は、主に
栓部材３の材質により決定される。FIG. 7 is a sectional view showing a state in which the bent composite ground electrode 5 is welded to the mounting bracket 7 of the ignition plug 6. Here, the mounting bracket 7 is made of a ferrous metal as is well known. The strength of the welded portion 5c of the composite ground electrode 5 with respect to the mounting member 7 is determined mainly by the material of the plug member 3.
以上述べたように本実施例では、複合接地電極５は、
ニッケルに充分な量のクロムあるいはアルミニウム等が
添加された耐食性の金属によってなる先端部5bと、純度
の高いニッケル等の良溶接性金属によってなり取付金具
に対する溶接部5cとを備え、先端部5bと溶接部5cとにそ
れぞれ用途に応じた材質が選択され、用いられている。As described above, in the present embodiment, the composite ground electrode 5
A tip part 5b made of a corrosion-resistant metal in which a sufficient amount of chromium or aluminum is added to nickel, and a welded part 5c made of a highly weldable metal such as nickel having a good weldability to a mounting bracket are provided. Materials corresponding to the respective applications are selected and used for the welded portion 5c.
「発明の効果」 以上説明したように、本発明によれば、カップ状の被
覆部材に、コア部材と栓部材を内部に密封し、その複合
体を所定形状としたので、一端にコア部材が露出せず耐
食性の高い接地電極が得られ、被覆部材と栓部材とが別
部品であってそれぞれ用途に応じた最適の材質が選択可
能になるという効果がある。[Effects of the Invention] As described above, according to the present invention, the core member and the plug member are hermetically sealed inside the cup-shaped covering member, and the composite is formed into a predetermined shape. A ground electrode that is not exposed and has high corrosion resistance is obtained, and the covering member and the plug member are separate components, and there is an effect that an optimum material can be selected according to each application.
また、本発明では、前記栓部材を良溶接性の金属にし
ているから、従来通りの押出し加工手段により取付金具
に対して充分な溶接強度を有する複合接地電極が得ら
れ、溶接部品質の安定した点火プラグが供給できるよう
になるという効果がある。Further, in the present invention, since the plug member is made of a metal having good weldability, a composite grounding electrode having a sufficient welding strength to the mounting bracket can be obtained by the conventional extrusion processing means, and the quality of the welded portion can be stabilized. This has the effect that a spark plug can be supplied.
第１図〜第７図は本発明の点火プラグの複合接地電極の
製造方法における各工程について示し、第１図は押出し
加工前の被覆部材を示す断面図、第２図は押出し加工前
のコア部材と栓部材とを示す断面図、第３図は前記コア
部材と栓部材とを接合した状態を示す断面図、第４図は
その接合されたコア部材と栓部材とを被覆部材に挿入
し、接合して複合体となした状態を示す断面図、第５図
は前記複合体に押出し加工を施した状態を示す断面図、
第６図は押出し加工後の前記複合体を所定の寸法に切断
して複合接地電極となした状態を示す断面図であり、第
７図は前記複合接地電極を点火プラグの取付金具に溶接
した状態を示す断面図である。 １……被覆部材、1a……穴、２……コア部材、３……栓
部材、４……複合体、５……複合接地電極、６……点火
プラグ。1 to 7 show steps in a method of manufacturing a composite ground electrode of a spark plug according to the present invention. FIG. 1 is a sectional view showing a covering member before extrusion, and FIG. 2 is a core before extrusion. FIG. 3 is a sectional view showing a state in which the core member and the plug member are joined, and FIG. 4 is a sectional view showing the joined core member and the stopper member inserted into the covering member. FIG. 5 is a cross-sectional view showing a state in which the composite is joined, and FIG. 5 is a cross-sectional view showing a state in which the composite is extruded.
FIG. 6 is a cross-sectional view showing a state where the composite after extrusion processing is cut into a predetermined size to form a composite ground electrode, and FIG. 7 is a diagram showing the composite ground electrode welded to a mounting bracket of a spark plug. It is sectional drawing which shows a state. DESCRIPTION OF SYMBOLS 1 ... Coating member, 1a ... Hole, 2 ... Core member, 3 ... Plug member, 4 ... Composite, 5 ... Composite ground electrode, 6 ... Spark plug.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｈ０１Ｔ 13/20 Ｈ０１Ｔ 13/20 Ｅ (58)調査した分野(Int.Cl.6，ＤＢ名) H01T 21/02 H01T 13/20 B21K 3/00 B21K 21/08──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 identification symbol FI H01T 13/20 H01T 13/20 E (58) Investigated field (Int.Cl. 6 , DB name) H01T 21/02 H01T 13 / 20 B21K 3/00 B21K 21/08
Claims (2)
地電極の製造方法であって、 耐食性の金属によってなりその一端に開口した穴を設け
られたカップ状の被覆部材を成形する工程と、 前記被覆部材よりも熱伝導度の高い金属によってなり前
記被覆部材の穴に嵌合するコア部材と、前記取付金具に
対する溶接性が前記被覆部材よりも優れた金属によって
なり前記被覆部材の穴に嵌合する栓部材とをそれぞれ成
形する工程と、 前記コア部材と前記栓部材とを接合する工程と、 その接合された前記コア部材と前記栓部材とを前記被覆
部材の穴に挿入後接合して前記コア部材が内部に密封さ
れた複合体となす工程と、 その複合体を所定の寸法形状に押出し成形する工程と、 を備えることを特徴とする点火プラグの複合接地電極の
製造方法。1. A method of manufacturing a composite ground electrode to be welded to a mounting bracket of a spark plug, comprising the steps of: forming a cup-shaped covering member made of a corrosion-resistant metal and having a hole opened at one end thereof; A core member made of a metal having a higher thermal conductivity than the covering member and fitted into the hole of the covering member; and a core member made of a metal having better weldability to the mounting bracket than the covering member and fitted into the hole of the covering member. Forming each of the plug members to be combined with each other; bonding the core member and the plug member; and inserting the bonded core member and the plug member into a hole of the covering member and then bonding them. A method of manufacturing a composite ground electrode for a spark plug, comprising: a step of forming a composite in which the core member is sealed inside; and a step of extruding the composite into a predetermined size and shape.
地電極であって、 耐食性の金属によってなりその一端に開口した穴を有す
るカップ状の被覆部材と、 前記被覆部材よりも熱伝導度の高い金属によってなり前
記被覆部材の穴に嵌合されたコア部材と、 前記取付金具に対する溶接性が前記被覆部材よりも優れ
た金属によってなり前記被覆部材の穴に嵌合されて前記
コア部材を前記被覆部材内に封入する栓部材とを備え、 前記栓部材が前記取付金具に溶接されていることを特徴
とする点火プラグの複合接地電極。2. A composite ground electrode welded to a mounting bracket of a spark plug, comprising: a cup-shaped covering member made of a corrosion-resistant metal and having a hole opened at one end thereof; A core member made of a high metal and fitted into the hole of the covering member; and a core made of a metal having better weldability to the mounting bracket than the covering member and fitted into the hole of the covering member to form the core member. A plug member sealed in a covering member, wherein the plug member is welded to the mounting bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1077513A JP2805807B2 (en) | 1989-03-29 | 1989-03-29 | Composite ground electrode for spark plug and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1077513A JP2805807B2 (en) | 1989-03-29 | 1989-03-29 | Composite ground electrode for spark plug and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02256187A JPH02256187A (en) | 1990-10-16 |
| JP2805807B2 true JP2805807B2 (en) | 1998-09-30 |
Family
ID=13636048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1077513A Expired - Lifetime JP2805807B2 (en) | 1989-03-29 | 1989-03-29 | Composite ground electrode for spark plug and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2805807B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004329335A (en) | 2003-04-30 | 2004-11-25 | Endo Mfg Co Ltd | Manufacturing method of golf club head |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2633655B2 (en) * | 1988-10-31 | 1997-07-23 | 日本特殊陶業株式会社 | Method for manufacturing outer electrode of spark plug in which good heat conducting metal is wrapped |
-
1989
- 1989-03-29 JP JP1077513A patent/JP2805807B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02256187A (en) | 1990-10-16 |
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