The utility model provides a preparation mold of a controllable-density
silica gel foaming material, which relates to the technical field of
silica gel foaming preparation and comprises a base, a sleeve arranged on the surface of the base, a vibrating spring arranged in the sleeve, a lower mold arranged at the top end of the vibrating spring, an
electric heating wire arranged in the lower mold and a fixing plate arranged on the surface of the base. A vibration
assembly is arranged on the surface of the fixing plate, the vibration
assembly, a vibration spring and a guide groove are adopted, a
servo motor drives a driving rod to rotate, a
crank at the end of the driving rod does
circular motion along with the driving rod, the
circular motion is converted into vertical
linear motion of a moving block through a connecting rod, and then a connecting plate drives a lower mold to vibrate vertically; and meanwhile, the vibration spring assists the lower mold to realize more stable and efficient vibration, continuous and regular acting force can be applied to
silica gel raw materials poured into the lower mold, the raw materials are promoted to be fully mixed in the lower mold, the density consistency of final products is greatly improved, and therefore the overall quality of the silica gel foaming materials is remarkably improved.