Delay_System

10 ����������� ��������� ��������� ��� �������������������� �������� ��� �������������������� �������������� ����������� ��������� ��������� ��� �������������������� �������� ��� �������������������� �������������� ���������� 5 6 7 8 9 12 11 11 10 1 2 3 4 4 1 2 3 4 4 10 5 6 7 8 9 12 11 11 ��������������� ��������������� The Ram of the press 1 starts its return stroke from the BDC while the cylinder rods are blocked at the BDC (the retention is pos- sible even with partial rod strokes). In case the full stroke is used, no fluid is left inside the cylinders 3 , whereas in case of partial stroke use, some residual volume is left. The retention valves 4 stand idle and the pressure-reducing valve 6 no longer produces any contrasting force. It is during this phase that the fluid compressability leads to the so-called Springback* effect for an extent of 0.2 mm maximum. The fluid pumped by the command unit 12 goes on flowing through the circuit of the air-oil exchanger 7 . * Springback = slight subsidence in the retention of the cylinder rods, hence of the blank holder. Maximum extent: 0.2 mm. Phase 3