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AssigneeC.R.F. Societa Consortile per Azioni
InventorDaniele Pullini
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A welded joint between at least one metal material element and at least one thermoplastic material element is obtained by pressing the elements against each other while applying heat. Contact surfaces of the metal material, which are in contact with the thermoplastic material, are provided with uneven surface portions having a distribution of asperities. With heat applied, the thermoplastic material fills spaces between these asperities and maintains this configuration after subsequent cooling, thereby improving strength of the joint. The uneven surface portions are obtained in a preliminary forming step of the metal material in a press mold, which is configured with a forming surface for generating the uneven surface portions by mechanical deformation and/or with a device for guiding a laser or electron beam. By this technique, hybrid components are obtained made of one or more elements of metal material between which a shaped component of thermoplastic material is interposed.
A method for obtaining a welded joint between elements of different materials, wherein the welded joint comprises at least one element of metal material and at least one element of thermoplastic material having respective contact surfaces, wherein said contact surfaces of said at least one element of metal material and said at least one element of thermoplastic material are pressed against each other with simultaneous application of heat, wherein the contact surface of said at least one metal element has at least one uneven surface portion, wherein said at least one uneven surface portion has a distribution of asperities, wherein said application of heat is such as to generate a softening of the thermoplastic material, so that said thermoplastic material fills spaces between the asperities of said uneven surface portion and maintains this configuration after a subsequent cooling,
Dependencies are inferred from the claim text.