| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw for injection molding for a powder material capable of stably sending a powder material for injection molding, capable of suppressing the irregularity of a charge time low to obtain a molded product of stable quality. SOLUTION: The surface roughness of the feed zone 12 of a screw main body is finished to about 6.3S or less in the max. height (Rmax) and the surface roughness of the compression zone and the metering zone 14 is highly finished to about 0.8S or less in the max. height (Rmax). |
