| 摘要 |
A rocking press machine includes a swinging metal die 2 and a rocking shaft 1 mounted above the metal die 1 and transmitting a swinging motion to the metal die 2, with the angle of eccentricity of the central axis thereof and the angular velocity of the orbiting motion thereof being adjustable. A friction disk 3 is provided between the metal die 2 and rocking shaft 1, a gyro 4 encloses the metal die 2 or a frame 20 surrounding the metal die 2 and supports 5 provided outside the gyro 4, first projections 61 and first recesses 71 rotatably supporting the first projections formed on the metal die 2 or the surrounding frame 20 and in the gyro 4, second projections 62 and second recesses 72 rotatably supporting the second projections formed on the gyro 4 and the supports 5. The rocking press machine permits the metal die 2 to swing with freedom of angular motion in a two dimensional space, prevents the metal die 2 from rotating on its own central axis, and, thereby, permits obtaining accurate patterns. The rocking press machine forms accurate patterns by preventing shifts that might be caused by the rolling motion of the metal die over the surface of the work and resultant undesirable effects in pattern forming.
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