With increasing time the movement, velocity and acceleration of mold will become sinusoidal wave. When the crank length increases from 40mm to 70mm under linkage length L=160mm the maximum movement, velocity and acceleration will increase and the minimum ones will increase. The phase angle will decline with inclining rotation with sinusoidal wave but the size of them maintains unchanged respectively. So it is chosen of the short crank and long linkage so as to maintain maximum force. To be rapid work the rotation is needed highly.