| 摘要 |
<p>The pressure table (18) has a movable press piston (10), and, at the top, a shaft hand driven by bars (6). The shaft carries a cam which works with a follower (8), fixed to the piston. The cam has one part which is helical and a constant radius section. The follower is pressed against the cam to follow its profile. A movable mould (19) can imprint on to the pressure table. Below is another piston, working parallel with the first, to effect a process to release from the mould.</p> |
