Hold-down structure for corrugated board making machine

A hold-down structure installed in a machine base of a machine and adapted for compacting a workpiece being transferred by said machine, said hold-down structure comprising:

• a conveyer unit, said conveyer unit comprising an upper conveyer means, a lower conveyer means spaced below said upper conveyer means, a transfer path defined between said upper conveyer means and said lower conveyer means through which said workpiece is transferred, said upper conveyer means comprising of a circulating endless transfer belt and a plurality of rollers rotatable to move said circulating endless transfer belt;
• and
• a pressure unit, said pressure unit comprising front and rear pairs of upright supports arranged at two opposite lateral sides relative to said conveyer unit, and multiple linked series of pressure blocks arranged in parallel and suspending between said front and rear pairs of upright supports and pressed on a top surface of a lower part of said circulating endless transfer belt of said upper conveyer means to give a downward pressure to said lower part of said circulating endless transfer belt of said upper conveyer means against said workpiece.