A rotor assembly is provided for an electric motor. The rotor assembly includes: a cylindrical magnet member having magnetization in both axial and radial directions, the magnet member being formed from a moldable magnetic material; and an output shaft receivable within the magnet member. An inner surface of the magnet member and an outer surface of the output shaft have complementarily-engagable interface elements thereon to prevent or limit dislocation of the magnet member and output shaft, and at least one of the interface elements is formed by overmolding of the magnet member and output shaft with the other of magnet member and output shaft.

A method produces plastic/metal hybrid components, in particular for the automotive field. A plastic compound is injected into a tool mold, and the tool mold has a core onto which a metal is injected. The plastic compound is then injected into the tool mold such that the metal is back-molded with the plastic compound and is fixed to the plastic in order to produce a blank. The tool mold is used to produce at least one depression in the surface of the blank, the depression being at least partly filled with a metal as part of a first additional processing.

A composite component and methods for producing a composite component are described herein. In some aspects, a method for producing a composite component may include molding a body from a plastic material, such that the molded body has at least one recess arranged adjacent to at least one respective projection. This method may also include pressing the at least one respective projection such that the plastic material of the molded body is thereby displaced into an opening-side region of the at least one recess adjacent thereto. The method may further include introducing flowable filler material into the at least one recess and solidifying the filler material. The filler material may be an electrically conductive filler material.

To manufacture a motor vehicle composite component, plastic particles are introduced into a mold cavity of a mold and are connected there to one another to form a particle foam. The mold is then adjusted while the mold cavity changes, and a thermoplastic plastic is then injected into the mold cavity while a carrying element and/or at least one fastening element are formed, wherein the thermoplastic plastic is bonded to the particle foam at least by connection in substance. The aforementioned materials may also be introduced in the reverse order. The mold is then adjusted once again while the mold cavity changes, and a metal melt is then injected into the mold cavity, as a result of which an electrical strip conductor and/or at least one metallic fastening element are formed.

A method produces plastic/metal hybrid components, in particular for the automotive field. A plastic compound is injected into a tool mold, and the tool mold has a core onto which a metal is injected. The plastic compound is then injected into the tool mold such that the metal is back-molded with the plastic compound and is fixed to the plastic in order to produce a blank. The tool mold is used to produce at least one depression in the surface of the blank, the depression being at least partly filled with a metal as part of a first additional processing.

A rotor assembly is provided for an electric motor. The rotor assembly includes: a cylindrical magnet member having magnetization in both axial and radial directions, the magnet member being formed from a moldable magnetic material; and an output shaft receivable within the magnet member. An inner surface of the magnet member and an outer surface of the output shaft have complementarily-engagable interface elements thereon to prevent or limit dislocation of the magnet member and output shaft, and at least one of the interface elements is formed by overmolding of the magnet member and output shaft with the other of magnet member and output shaft.

A plastic component with at least one electrical contact element has a plastic body and at least one electrical strip conductor, by which the electrical contact element can be electrically connected. Provisions are made for the plastic component to be manufactured by a combined injection molding and metal casting method, in which the plastic body is manufactured by an injection molding method and the at least one electrical strip conductor is manufactured by a metal casting or metal injection molding method one after another. The component formed last is molded onto the component formed first. Further, a method for manufacturing a corresponding plastic component is described.

A composite component and methods for producing a composite component are described herein. In some aspects, a method for producing a composite component may include molding a body from a plastic material, such that the molded body has at least one recess arranged adjacent to at least one respective projection. This method may also include pressing the at least one respective projection such that the plastic material of the molded body is thereby displaced into an opening-side region of the at least one recess adjacent thereto. The method may further include introducing flowable filler material into the at least one recess and solidifying the filler material. The filler material may be an electrically conductive filler material.

A metal member-polyarylene sulfide resin member composite having an air-tight joint between the metal member and the polyarylene sulfide resin member and a method for its production are provided. A metal member-polyarylene sulfide resin member composite comprising a metal member and a polyarylene sulfide member which is obtained by injection molded direct joining, wherein the polyarylene sulfide member is made of a polyarylene sulfide resin composition which satisfies all of the following (1) to (3): (1) it has a melt crystallization peak temperature of at least 200 C. and at most 230 C., (2) it has an MFR of at least 20 g/10 minutes and at most 150 g/10 minutes, and (3) it comprises 100 parts by weight of a polyarylene sulfide resin (A), from 5 to 25 parts by weight of a modified ethylene copolymer (B) and from 10 to 120 parts by weight of glass fiber (C).

A method for making an oscillating weight for an automatic winding mechanism of a self-winding watch including a central part made from a first composite material and a heavy sector made from a second composite material charged with heavy metal particles, the method including: forming the central part with a lateral rib and a rebate by injecting the first composite material into a mold; overmolding the heavy sector onto the central part by injecting the second composite material into a mold containing the central part, so that the second composite material fills the rebate and a gap underneath the lateral rib, so that the lateral rib is embedded in the second composite material and the central part and the heavy sector are interlocked.