Form for molding machine to manufacture cinder block e.g. precast concrete block has mold cavity, elevation or recess on side wall whereby elevation or recess has gap and runs from higher located first point to lower second point

摘要

The form (1) has the elevation and/or the recess (8,9) on the sidewall (4,5,6,7). The elevation and/or recess runs from higher located first point (P1) to the lower located second point (P2). The elevation and/or recess is sloped at an angle (alpha ) from 2[deg] to 10[deg] and particularly 5[deg] to a horizontal angle.