Sintering process for automobile ceramic sparking plug

Abstract

The invention relates to the technical field of ceramic part manufacturing, in particular to a sintering process for an automobile ceramic sparking plug. The sintering process comprises the five steps of isostatic compaction, abrasive machining, biscuit firing, glazing and high-pressure sintering. According to the sintering process, dry pressing molding is used for replacing a traditional slurry injection hot briquetting process, an isostatic press is used for conducting cold press molding on dry powder, and in the process engineering, the parameters such as the feeding amount of the dry powder, the heating temperature and time, the thickness of an enamel layer are continuously optimized. A formed sparking plug product is high in density, small in sintering shrinkage, stable in thermal performance, high in production efficiency and high in applicability.

Description

Technical field: [0001] The invention relates to the technical field of manufacturing ceramic parts, in particular to a sintering process for ceramic spark plugs used in automobiles. Background technique: [0002] The function of the spark plug is to discharge the pulsed high-voltage electricity sent by the high-voltage wire, break down the air between the two electrodes of the spark plug, and generate electric sparks to ignite the mixed gas in the cylinder; as one of the key ignition components of gasoline or gas engines, the spark plug, It cooperates with the ignition system and the fuel supply system to make the engine work, and the reliability of the spark plug directly affects the power and exhaust emission of the engine; due to the increase of the cylinder compression ratio, the ignition voltage of the spark plug must be increased accordingly, so The working environment of spark plug porcelain insulators will become more and more harsh, and the traditional manufacturin...

AI Technical Summary

Problems solved by technology

[0002] The function of the spark plug is to discharge the pulsed high-voltage electricity sent by the high-voltage wire, break down the air between the two electrodes of the spark plug, and generate electric sparks to ignite the mixed gas in the cylinder; as one of the key ignition components of gasoline or gas engines, the spark plug, It cooperates with the ignition system and the fuel supply system to make the engine work, and the reliability of the spark plug directly affects the power and exhaust emission of the engine; due to the increase of the cylinder compression ratio, the ignition voltage of the spark plug must be increased accordingly, so The working environment of spark plug porcelain insulators will become more and more harsh, and the traditional manufacturing process of spark plug porcelain insulators is mostly slurry injection hot pressing molding, and the porcelain insulators made by slurry injection hot pressing molding will have pores, shrinkage cavities and cracks during firing. Instable thermal performance and other defects, its performance is also difficult to meet the needs of the development of gasoline or gas engines

[0003] A few days ago, powder molding is a very important processing method, an advanced manufacturing technology that saves energy and materials, and is currently a more advanced molding process. With its unique advantages, it has begun to replace traditional molding methods, such as ceramic production. Spark plugs, ceramic balls, plungers, vacuum tube shells and other products, the existing dry powder molding equipment for the production of spark plugs, it is difficult to further improve the processing dimensional accuracy of spark plugs, and cannot meet market requirements