Assembly block for producing polycrystalline diamond compacts

The invention belongs to the field of synthesizing polycrystalline diamond compacts by applying an ultrahigh pressure method, and particularly relates to an assembly block for producing the polycrystalline diamond compacts. The assembly block comprises a pressure transmission sealing plug, the pressure transmission sealing plug comprises a pressure transmission ring block, a conductive head is embedded in a ring hole of the pressure transmission ring block, the conductive head comprises a top wall, a bottom wall and a side wall connected between the top wall and the bottom wall, and the space among the top wall, the bottom wall and the side wall is filled with a pressure transmission body. The top wall and the bottom wall are flush with the upper end face and the lower end face of the pressure transmission ring block respectively. The pyrophyllite ring block is matched with the conductive head to form the plug, except for the top wall, the bottom wall and the side wall of the conductive head, the conductive h