PRODUCTION OF COMPOSITE TYPE VIBRATION DAMPING METALLIC PLATE

PURPOSE:To produce the composite type vibration damping metallic plate homogeneous over the entire part by uniformizing the face pressure over the entire surface at the time of producing the composite type vibration damping metallic plate by the diffusion joining arising between the metallic plate and an insert metal when these metals are annealed in the state of applying the face pressure thereto by weights. CONSTITUTION:The plural weights 1, 2, 3 having the same weight per unit base area are used as weights by arraying these weights on unjoined laminates 4 stacked on each other in the plate crown direction of the metallic plates in such a manner that these weight do not hinder the relative movement in a vertical direction and that the weights generate the load uniform over the entire surface of the metallic plates. The load in the thin part of the plate thickness is made larger than the load in the thick part by using the plural weights varying in the weight per unit base area if a spacing arises between the metallic plates in the thin part of the plate thickness. Since the material metallic plate can be made into the product effective for the full width, the yield is improved.