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公开(公告)号：US20170326765A1
公开(公告)日：2017-11-16
申请号：US15534529
申请日：2015-09-23
发明人： Hirokazu Kurono , Hironori Uegaki , Toshitaka Honda , Hiroyuki Hazama , Kuniharu Tanaka , Hiroyuki Kawaji
CPC分类号： B29C45/14655 , B28B1/24 , B28B7/0038 , B28B7/18 , B28B7/346 , B28B13/06 , H01T13/20 , H01T13/34 , H01T13/39 , H01T21/02
摘要： An employed rear mold is comprised of a plurality of mold pieces. The plurality of mold pieces include a first mold piece which forms a first partial internal surface of the internal surface of the rear mold along the entire circumference of the internal surface, and a second mold piece which is located axially forward of the first mold piece and forms a second partial internal surface of the internal surface of the rear mold along the entire circumference of the internal surface. Releasing the molded body includes starting to move the first mold piece rearward in relation to a rear molded portion, and, subsequently to starting to move the first mold piece, starting to move the second mold piece rearward in relation to the rear molded portion, thereby disassembling the rear mold into the plurality of mold pieces.
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公开(公告)号：US09806500B2
公开(公告)日：2017-10-31
申请号：US15504500
申请日：2015-09-11
发明人： Koichi Sakairi , Hiroshi Matsuo , Kunihiro Tanaka
CPC分类号： H01T13/39 , B23K11/002 , H01T21/02
摘要： The present invention relates to a tape material for manufacturing an ignition plug electrode, the tape material being a member for forming an electrode chip, in which a base metal layer and a precious metal layer are cladded, on a bonded region set on an electrode base material of an ignition plug, the member is in the form of a long tape in which the base metal layer being in contact with the bonded region is cladded with the precious metal layer being in contact with the base metal layer, the base metal layer has a width substantially equal to one of the longitudinal width, lateral width and diameter of the bonded region. According to the present invention, bonding between a precious metal chip and a substrate can be reliably maintained to prolong the life of an ignition plug. Accordingly, precious metals can be efficiently used to save resources.
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公开(公告)号：US20170288372A1
公开(公告)日：2017-10-05
申请号：US15453565
申请日：2017-03-08
发明人： Susumu IMAI
IPC分类号： H01T13/39
摘要： A spark plug includes an insulator having an axial hole extending along an axial line, a center electrode disposed in the axial hole, a tubular metallic shell surrounding the insulator, a ground electrode whose proximal end is fixed to the metallic shell, and a cylindrical noble metal tip fixed to the ground electrode via an intermediate tip so as to form a gap between the noble metal tip and the center electrode. A weld portion is provided between the noble metal tip and the intermediate tip. The weld portion has a diameter larger than that of a portion of the intermediate tip which is adjacent to the weld portion. The noble metal tip is located inside a virtual tapered cylindrical surface which extends from a peripheral edge of a gap-side end of the center electrode so as to contact an outer circumferential edge of the weld portion.
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公开(公告)号：US20170264082A1
公开(公告)日：2017-09-14
申请号：US15504500
申请日：2015-09-11
发明人： Koichi SAKAIRI , Hiroshi MATSUO , Kunihiro TANAKA
CPC分类号： H01T13/39 , B23K11/002 , H01T21/02
摘要： The present invention relates to a tape material for manufacturing an ignition plug electrode, the tape material being a member for forming an electrode chip, in which a base metal layer and a precious metal layer are cladded, on a bonded region set on an electrode base material of an ignition plug, the member is in the form of a long tape in which the base metal layer being in contact with the bonded region is cladded with the precious metal layer being in contact with the base metal layer, the base metal layer has a width substantially equal to one of the longitudinal width, lateral width and diameter of the bonded region. According to the present invention, bonding between a precious metal chip and a substrate can be reliably maintained to prolong the life of an ignition plug. Accordingly, precious metals can be efficiently used to save resources.
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公开(公告)号：US20170256916A1
公开(公告)日：2017-09-07
申请号：US15444857
申请日：2017-02-28
发明人： Tomoyuki IGARASHI
摘要： A spark plug having a noble metal tip that is joined to a tip-joining surface of a ground electrode so as to face an end face of a center electrode. When the noble metal tip is projected onto a projection plane parallel to the tip-joining surface, the noble metal tip has an elliptical shape in the projection plane. When the ground electrode is also projected onto the projection plane, an angle of 45° or less is formed between the major axis of the elliptical shape in the projection plane and a straight line extending in the lengthwise direction of the ground electrode and passing through the center of the noble metal tip in the projection plane.
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公开(公告)号：US09705291B2
公开(公告)日：2017-07-11
申请号：US15072820
申请日：2016-03-17
发明人： Yuichi Yamada , Takuya Kawade
摘要： An ignition plug having a ground electrode that includes a base material layer and an erosion-resistant layer having a thermal conductivity of 40 w/m·K or more. The erosion-resistant layer extends at least from the center-electrode-facing portion to a location closer to the fixed end than a front end of the center electrode and 0.2 mm≦thickness t1 of the erosion-resistant layer≦thickness T of the ground electrode 30−0.6 mm is satisfied.
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公开(公告)号：US20170170636A1
公开(公告)日：2017-06-15
申请号：US15380323
申请日：2016-12-15
CPC分类号： H01T13/467 , H01T13/32 , H01T13/39
摘要： A spark plug having at least one center or ground electrode that includes a first base metal or a first base metal alloy and a precious metal or a precious metal alloy. The at least one electrode has a surface bordering a spark gap that is made of a composite material in which crystalline particles of the precious metal or precious metal alloy are mixed with the first base metal or the first base metal alloy, and a portion of the particles of the precious metal or precious metal alloy forms a portion of the surface that borders the spark gap.
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公开(公告)号：US09614353B2
公开(公告)日：2017-04-04
申请号：US14755361
申请日：2015-06-30
发明人： Yusuke Kawashima
摘要： A spark plug comprises a ground electrode including a chip whose one end has a cylinder shape having a diameter A from 0.8 to 1.2 mm and whose main component is a noble metal, and an electrode base material. In the ground electrode, a portion of the other end of the chip is joined to the electrode base material through a fused portion. The spark plug also comprises a chip-and-base-material interface in which the chip and the electrode base material contact each other and which is surrounded by the fused portion. In a cross section passing through a center axis, a distance between an end point Pa7 located on the chip-and-base-material interface and an end point Pa5 located on an interface between the chip and the fused portion is equal to or greater than 0.7 times the diameter A.
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公开(公告)号：US20170077682A1
公开(公告)日：2017-03-16
申请号：US15261017
申请日：2016-09-09
申请人： DENSO CORPORATION
摘要： A spark plug for an internal combustion engine is provided which includes a housing, a porcelain insulator, a center electrode, and an annular ground electrode. The housing has a small-diameter portion which has a smaller inner diameter and defines a front end thereof. The ground electrode is secured to a front end surface of the small-diameter portion and forms a spark gap between itself and an outer periphery of the center electrode. The ground electrode is smaller in outer diameter than the front end surface of the small-diameter portion. A annular weld which joints the ground electrode and the small-diameter portion is formed in an annular boundary through which the front end surface of the small-diameter portion and the base end surface of the ground electrode face each other. The annular weld continuously and fully extends in a circumferential direction of the ground electrode.
摘要翻译： 提供了一种用于内燃机的火花塞，其包括壳体，瓷绝缘体，中心电极和环形接地电极。 壳体具有小直径部分，其具有较小的内径并限定其前端。 接地电极被固定到小直径部分的前端表面，并且在其自身与中心电极的外周之间形成火花隙。 接地电极的外径小于小直径部分的前端面。 将接地电极和小直径部分接合的环形焊缝形成在小直径部分的前端表面和接地电极的基端面面对的环形边界中。 连续地并且完全沿接地电极的圆周方向延伸的环形焊缝。
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公开(公告)号：US20170047712A1
公开(公告)日：2017-02-16
申请号：US15233668
申请日：2016-08-10
发明人： Werner Niessner , Alexander Schenk
摘要： A spark plug haying a center conductor, an insulator surrounding the center conductor, at least two electrodes forming a spark gap, and a spark plug body surrounding the insulator and haying an external thread arranged at the front end of the spark plug for screwing in to an internal combustion engine. A component that is attached to the front end of the spark plug and comes into contact with fuel during operation is formed as a sintered powder injection molded part, referred to as a MIM component.
摘要翻译： 火花塞缠绕中心导体，围绕中心导体的绝缘体，形成火花间隙的至少两个电极和围绕绝缘体的火花塞体，并且缠绕设置在火花塞前端的外螺纹，用于拧入 内燃机 形成作为火花塞的前端并与运转时的燃料接触的部件，形成为烧结粉末注射成型部件，称为MIM部件。
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