A stator manufacturing method includes providing a stator assembly including a stator core having coils wound on plural teeth projecting from a yoke and a case surrounding an outer periphery of the stator core, arranging a ring-shaped resin member at least at one end portion in an axial direction of the case such that at least part of the resin member is crushed when pressed by a mold, clamping the stator assembly inside the mold with the resin member arranged at the at least one end portion in a state in which the resin member is pressed, and injecting a molding resin into the mold.

Disclosed is a rotor for a compressible fluid pump, in particular a blood pump that can be introduced into a patient's body through a blood vessel; said rotor comprises one or more impeller elements, is compressible and expansible between an expanded state and a compressed state, is made at least in part of a fiber-reinforced plastic material, is provided for rotating about an axis of rotation, and is characterized in that in the expanded state of the rotor, a first percentage, i.e. more than 30%, in particular more than 50%, of the fibers runs substantially straight between the first end (10a, 11a, 13a) thereof lying closest to the axis of rotation and a second end lying further away from the axis of rotation. According to the invention, the rotor retains its shape very well even when subjected to repeated mechanical stress.

A transfer molding system includes a plurality of resin receptacles selectively movable by a resin support into registration with a first actuator for dispensing resin material through a transfer manifold and into a component core. Two or more component cores are supported on a core support for selective movement to a position for receiving resin material dispensed through the manifold. The resin receptacles and manifold may be controllably heated to melt the resin material and maintain temperatures to facilitate resin transfer into the component cores.

A rotor includes a rotor core including multiple housing holes, multiple magnets accommodated in the housing holes, and multiple plastic portions. Each plastic portion is formed by plastic that fills corresponding one of the housing holes and fixes the corresponding magnet to the rotor core. Each plastic portion includes an end face exposed from an opening of the corresponding housing hole. A gate mark is formed in the end face. A quotient obtained by dividing an area of the end face of each plastic portion by an area of the gate mark is in a range of 24 to 150.

A transfer molding system includes a plurality of resin receptacles selectively movable by a resin support into registration with a first actuator for dispensing resin material through a transfer manifold and into a component core. Two or more component cores are supported on a core support for selective movement to a position for receiving resin material dispensed through the manifold. The resin receptacles and manifold may be controllably heated to melt the resin material and maintain temperatures to facilitate resin transfer into the component cores.

The invention relates to a rotor for a compressible fluid pump, in particular a blood pump that can be introduced through a blood vessel into a patient's body, wherein said rotor comprises one or more conveying elements (15), is compressible and expandable between a first compressed state and a second radially expanded state, is made at least partially from a plastic reinforced with reinforcing elements, in particular fibers (10, 11, 13, 18, 19, 55, 56, 62, 63) and is provided for rotation about an axis of rotation (14). According to the invention, the rotor is tensioned in the first, compressed state and free from external stresses in the second, expanded state. A third state exists, which the rotor (42) occupies in the operating state under load. The reinforcing elements, in particular fibers, extend in the rotor in the third state at least in sections in a stretched manner.