| 摘要 |
PURPOSE:To easily manufacture a purifier base body in which stainless steel pipes and an external pipe are combined by closely inserting stainless steel pipes filled with easily soluble powder into a heat-resistant steel pipe, reducing the sectional area by hot processing, then, cutting the pipe to a required length and removing the easily soluble powder. CONSTITUTION:A stainless steel belt 1 is formed into a pipe and just after a seam is welded by a welding torch 6, the inside of the steel pipe is packed by a nozzle 8 with easily soluble powder 10. The stainless steel pipes 11 are provided by reducing their diameters with cold milling rolls 9 and pressing the powder. Then, a honeycomb shape is prepared by closely inserting a necessary number of stainless steel pipes for a honeycomb pipe into the heat-resistant pipe 12 for the external pipe. Then, hot processing is given to these pipes to reduce their sectional areas under a quarter of the original and join the stainless steel pipes 11 to each other. Then, they are cut to necessary lengths and the easily soluble powder 10 is melted and removed by chemical or electrochemical treating to obtain the base body for an exhaust gas purifier packed with honeycomb stainless steel pipes 11 having spaces 13 in the heat-resistant pipe 12 for the external pipe.
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