Patent ID: 7216421
Filing Date: 2007-05-15
Classification: H05K,Y10T

Abstract:
1. A stamping machine adapted for mounting a retention frame of a heat sink to a motherboard, the stamping machine comprising: a machine body comprising: a control unit controlling stamping of the stamping block, wherein the control unit comprises an Alternating Current (AC) loop and a Direct Current (DC) loop system, the AC loop comprises a power supply switch and a first relay connected in series to an AC power source, the DC loop system comprises a protecting loop, a start-up loop having two touch switches connected in series to be simultaneously pressed to start up the cylinder, an overtime loop having an overtime relay, and a control loop comprising an overtime relay switch controlled by the overtime relay, and an electromagnetic valve connected in series to the overtime relay switch to control the cylinder, and wherein the four loops of the DC loop system are connected in parallel to a DC power source via a relay switch which is controlled by the first relay of the AC loop.