Dynamic Characteristics Analysis of Mold Oscillation Mechanism Generating Non-Sinusoidal Waves

Abstract

In this study, to understand the vibration characteristics of the mold vibrator, the vertical vibration, including the rotational transmission of a four-bar mechanism generating non-sinusoidal waves, was numerically implemented. Physical characteristics were compared through behavior comparison with a mechanism that vibrates in a sinusoidal wave due to gear transmission, and the impact that the system receives was discussed by introducing the jerk, a first-time derivative of acceleration. Based on this basic modeling, an optimization problem with the change in the length of the crank and connecting rod constituting the four-bar linkage as a variable was finally established, and the process of deriving the solution was performed. The equation of motion was derived using the Newmark, direct integration, and the transient response obtained by applying a constant rotational force was compared. Unlike the transmission of rotation by gears, the deviation of the behavior of the four-bar mechanism follower increases, and the non-sinusoidal vibration changes according to the length ratio of the crank and connecting rod, so the effect on the playing process was analyzed.