Abstract: A twin-wall composite sheet (8) comprising (a) at least one inner thermoplastic polymer film (2), and (b) at least two external thermoplastic polymer films (4 and 5) is described. The inner film (2) is interposed between and connected to at least two of the outer films (4 and 5). The inner film has a three-dimensional structure comprising a plurality of at least one of elevations and depressions. The inner film has two main directions of extension, and the three-dimensional structure of the inner film has a substantially periodically recurring pattern in the two main directions of extension thereof. The inner film is fixedly connected to at least two of the outer films in a region of maximum height of elevations of the inner film and/or a region of the maximum depth of depressions of the inner film. The twin-walled composite sheet preferably has substantially the same flexural modulus in the two main directions of extension of the inner film.

Abstract: A laminated plastic and metal component is described, consisting of at least two metallic molded parts and which are connected to one another by injected thermoplastic molding composition, characterized in that in the area of the connection point of the molded parts, the molded parts form with the plastic a form closure, and in that the molded parts have no direct contact with one another, and in that the plastic forms an electrically insulating layer between the molded parts.

Abstract: A laminated plastic and metal component is described, consisting of at least two metallic moulded parts (1; 21; 31; 41) and (2; 22; 32; 42) which are connected to one another by gated thermoplastic plastic (3), characterised in that in the area of the connection point (17) of the moulded parts (1; 21; 31; 41) and (2; 22; 32; 42) the moulded parts (1; 21; 31; 41) and (2; 22; 32; 42) form with the plastic (3) a form closure, that the moulded parts (1; 21; 31; 41) and (2; 22; 32; 42) have no direct contact with one another, and that the plastic (3) forms an electrically insulating layer between the moulded parts (1; 21; 31; 41) and (2; 22; 32; 42).

Abstract: Complicated hollow bodies with undercuts and for multidimensional curves which do not permit the cores to be drawn out of the finished part, are pressed together from prefabricated shells (1) under simultaneously exact pre-shaping and are connected along the joints by injection-moulded plastics material.

Abstract: A unitary wheel is injection molded from reinforced thermoplastic material in such a manner that the melt streams of material meet and coalesce in the spokes of the wheel. This wheel has improved strength since the melt streams do not meet and coalesce in the rim portion thereby making the rim impact resistant. Coalescence of the melt streams in the spokes of the wheel is accomplished by introducing the streams into certain of the spokes while separating those spokes from each other by an odd number of intermediary spokes to which no material is directly injected.