Insulator for spark plug, and method for manufacturing spark plug

A manufacturing method and insulator technology, applied in spark plug manufacturing, spark plugs, manufacturing tools, etc., can solve problems such as increased manufacturing costs, and achieve the effects of guaranteed yield, high yield, and low manufacturing cost

Active Publication Date: 2009-09-23
NGK SPARK PLUG CO LTD
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the insulator for the spark plug may become a defective product, or the pres

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Insulator for spark plug, and method for manufacturing spark plug
  • Insulator for spark plug, and method for manufacturing spark plug
  • Insulator for spark plug, and method for manufacturing spark plug

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] The manufacturing method of Example 1 is a method of manufacturing the insulator 2, and the insulator 2 is an insulator for spark plugs. Since the spark plug 100 includes the insulator 2, first, the overall configuration of the spark plug 100 will be explained.

[0032] The spark plug 100 includes: a cylindrical metal shell 1; an insulator 2 fitted into the metal shell 1 so that its front end protrudes; a center electrode 3 provided in the insulator 2 with its front end protruding; and The ground electrode 4 is configured such that one end of the ground electrode 4 is joined to the metal shell 1 by welding or the like and the other end is bent laterally so that one side of the other end faces the front end of the center electrode 3.

[0033] A spark discharge gap g is formed between the ground electrode 4 and the center electrode 3. The metal shell 1 is formed of a metal such as low carbon steel in a cylindrical shape, and forms a casing for the spark p...

Example Embodiment

[0073] Example 2

[0074] Although the manufacturing method of the second embodiment is similar to the manufacturing method of the first embodiment, the pressing pin 250 and the upper holding portion 286 are used in the second embodiment instead of the pressing pin 50 and the upper holding portion 86 in the first embodiment. Therefore, due to the difference in the structure of these components, the above steps also have different points. Hereinafter, the description will be focused on differences from the manufacturing method of Embodiment 1, and the description of the same steps as those of Embodiment 1 will be omitted or simplified. The same reference numerals are used to indicate the same configurations as in Embodiment 1, and the description of these same configurations is omitted.

[0075] Below, will refer to Figure 9 to Figure 13 The method of manufacturing the insulator 2 according to Embodiment 2 will be described.

[0076] Preparation steps

[0077] Such as Picture ...

Example Embodiment

[0101] Example 3

[0102] Although the manufacturing method of embodiment 3 is similar to that of embodiment 1, as Figure 14 with 15 As shown, the pin configuration steps of Example 1 are changed (such as image 3 Shown) and powder filling steps (such as Figure 4 Shown). Hereinafter, the description will focus on the differences from the manufacturing method of Embodiment 1, and the description of the same steps as those of Embodiment 1 will be omitted or simplified. In addition, the same configurations as those of Embodiment 1 are designated by the same reference numerals, and the description of these same configurations is omitted.

[0103] Preparation steps

[0104] In the preparation step, similar to Example 1, the pressing pin 50 and the forming die 80 are prepared. As described in the preparation procedure of Example 1, the pressing pin 50 has: the first shaft portion 51 on the front end side in the axial direction; and is closer to the rear end side than the first sha...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an insulator for a spark plug, and a method for manufacturing the spark plug. The method includes: a preparing step; a press pin arranging step; a powder filling step after the press pin arranging step; a cavity blocking step after the powder filling step; a compression molding step after the cavity blocking step; a die releasing step after the compression molding step; and a press pin removing step after the die releasing step.

Description

technical field [0001] The present invention relates to an insulator for a spark plug and a method for manufacturing the spark plug. Background technique [0002] Japanese Patent Application Laid-Open No. 2000-315563 Figure 2 to Figure 6 A method of manufacturing an insulator for a spark plug is disclosed. This manufacturing method forms through-holes for inserting a center electrode and a terminal electrode in an axial direction in an insulator. [0003] In this manufacturing method, first, as a preparation step, a press pin for forming a through hole and a forming die having a cavity in which a rear end side in the axial direction is formed There are openings. A rib-shaped pin-side helical portion that spirally rotates around the outer peripheral surface of the press pin is formed at the rear end side of the press pin. [0004] Next, as a powder filling step, green powder is loaded from the opening and filled into the cavity. Next, as a press pin arranging step after ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01T21/02H01T13/20H01T13/38
CPCB28B1/30B28B1/44B28B3/003
Inventor 本田稔贵水野贵光樱井真一
Owner NGK SPARK PLUG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap