Abstract: Preform preparation apparatus for manufacturing plants for the production of bottles and containers, as well as products of various kind, comprising moulding means provided with machine tools for the preparation of a mass of molten plastic material, in view of obtaining a plurality of preforms therefrom, possible preform loading means and preform conveying means, along with means for cooling down and processing the same preforms in view of obtaining the desired finished products, in which said moulding means comprise at least a first and a second moulding means (26, 27) provided with plungers or punches (28) and at least a third moulding means (22) provided with moulding cavities (25), all of them communicating with said machine tools, said first and second moulding means (26, 27) being capable of selectively coupling with said third moulding means (22) for forming said preforms, in such a manner that, in the situation in which one of said first and second moulding means (26, 27) is coupled with said third mo