Metodo e apparato per lo stampaggio a caldo di prodotti in materiale termoplastico

The present invention relates to a method and apparatus for the moulding of products in thermoplastic material, particularly for the cooling of products obtained by hot injection of plastic materials into moulds. The production of products by the injection of thermoplastic materials into suitably shaped metal moulds is known in many sectors of the art. The moulds are mainly shaped by elements and contra-elements that, when united to close the mould, define a hollow space that reproduces the shape of the object that it is desired to obtain. The materials used, initially available in solid phase, usually as granules, are liquefied by increasing the temperature above their relative melting point and anjected by one ormore nozzles into the hollow space inside the closed mould. Subsequently, the mould is cooled to solidify the injected material and then to extract the finished product. With this system it is possible to produce parts, components, objects, etc., having complex shapes even for the most varied applications, e.g. for the production of objects in the auto, electrical appliance, electronic, aerospace and biomedical apparatus industries, etc.