An apparatus and method for eliminating mold lines when molding a part having ferromagnetic pigments is provided. A mold assembly having a mold with a cavity and valve gates is formed. Pucks are fitted at the gates to collect residual cold plastic. The calculation of a specific sequence and timing of the opening of the valve gates is determined based on a calculation of the total number of valve gates needed to fill a part while maintaining acceptable injection molding pressure. Once calculated, the gates are positioned around the mold cavity to balance flow length ratio. A primary gate is chosen for initial injection. The time for the material to flow from the first to the second gate is established. The second gate is opened after the flow front reaches the second gate. This pattern continues until all valve gates are opened.

A cured object and a method for producing the same are disclosed herein. In some embodiments, the method of producing a cured object includes introducing a resin composition including a resin and magnetic powder into one or more slots of a tubular object, wherein the resin composition includes a resin and a magnetic powder, wherein the tubular object includes a penetration space and an edge region having the one more slots formed therein, and wherein the penetration space and the one or more slots are formed in a longitudinal direction of the tubular object; inserting a solenoid coil into the penetration space of the tubular object; and generating a magnetic field with the solenoid coil to cure the resin present in the one or more slots of the tubular object.

The cured resin object can also have excellent withstand voltage characteristics.

This rotor core manufacturing method includes a step of retracting a resin injection portion of a resin injection apparatus relative to a stacked core that remains pressed by a jig, while maintaining a resin material stored in the resin injection portion in a molten state.

A manufacturing method of a coil component comprising the steps of: preparing a coil assembly body in which a coil is attached on a magnetic core and a mold body which is formed with a cavity portion in the inside thereof and which includes at least one opening portion, putting a viscous admixture including magnetic powders and thermosetting resin and the coil assembly body in the cavity portion, pushing the put-in viscous admixture in the mold body, and thermally-curing the pushed-in viscous admixture and forming a magnetic exterior body which covers the coil assembly body.

Provided are a method for producing a carbon fiber-reinforced molding material including a step of detecting the presence of metal in a molding material by a magnetic sensor-type metal detection method, and a method for producing a molded article including subjecting the carbon fiber-reinforced molding material produced by the production method to hot press molding. The method for producing a carbon fiber-reinforced molding material involves accurately detecting foreign metal in the carbon fiber-reinforced molding material and efficiently produces a carbon fiber-reinforced molding material without damaging a mold or causing other problems. The production method is thus suitably used to produce various molded articles, such as automobile parts.

A resin composition for forming a magnetic member of the present invention, which is used for compression molding, includes a thermosetting resin, magnetic particles, and non-magnetic particles having a lower specific gravity and a smaller cumulative 50% particle diameter D.sub.50 than the magnetic particles, in which the resin composition for forming a magnetic member is solid at 25° C.

A method for improving z-axis strength of a 3D printed object is disclosed. For example, the method includes printing a three-dimensional (3D) object with a polymer and magnetic particles, heating the 3D object to a temperature at approximately a melting temperature of the polymer, and applying a magnetic field to the 3D object to locally move the magnetic particles in the polymer to generate heat and fuse the polymer around the magnetic particles to improve a z-axis strength of the 3D object.

A method of manufacturing magnets and a method of manufacturing a rotor are provided. An intermediate member includes a sheet and magnet bodies. The sheet includes a first sheet surface and a second sheet surface on a side opposite to the first sheet surface. The magnet bodies are located on the first sheet surface. A first die is made of an elastic material having an elastic coefficient lower than the elastic coefficient of the magnet bodies. The intermediate member is arranged between the first die and a second die such that the second sheet surface of the sheet faces the first die. The first die and the second die hold the intermediate member in between. Accordingly, the sheet is cut at positions between adjacent ones of the magnet bodies.

A structure includes a plurality of elongated members flexibly coupled together. The flexible coupling between the elongated members allows the structure to transition between a first and second outer shape. Each of the elongated members has embedded ferromagnetic particles aligned to cause the respective elongated member to move in a predetermined deflection relative to each other in response to an applied magnetic field. The predetermined deflections cause the elongated members to collectively move the structure between the first and second outer shapes. An enclosure is coupled to the structure. The movement of the structure between the first and second shapes performs at least one of compressing and expanding a volume of the enclosure

Disclosed are functional materials for use in additive manufacturing (AM). The functional material can comprise an elastomeric composition (e.g., a silicone composite) for use in, for example, direct ink writing. The elastomeric composition can include and elastomeric resin, and a magnetic nanorod filler dispersed within the elastomeric resin. Nanorod characteristics (e.g., length, diameter, aspect ratio) can be selected to create 3D-printed constructs with desired mechanical properties along different axes. Furthermore, since nickel nanorods are ferromagnetic, the spatial distribution and orientation of nanorods within the continuous phase can be controlled with an external magnetic field. This level of control over the nanostructure of the material system offers another degree of freedom in the design of functional parts and components with anisotropic properties. Magnetic fields can be used to remotely sense compression of the constructs, or alternatively, control the stiffness of these materials.