An injection molding apparatus includes a plasticizing portion, a measurement injection portion that is disposed between the plasticizing portion and a molding mold, measures the plasticized material, and injects the measured plasticized material into the molding mold, a first drive portion changing a relative position between the plasticizing portion and the measurement injection portion, a pressure detection portion detecting a pressure inside the measurement injection portion and a control portion, in which the measurement injection portion is configured such that a volume of an internal space thereof, in which the plasticized material is stored, changes according to a change in the relative position between the measurement injection portion and the plasticizing portion, and the control portion executes at least one of a measurement operation of causing the measurement injection portion to measure the plasticized material by controlling the first drive portion to move the plasticizing portion and the measurement injection portion in a direction away from each other, and an injection operation of injecting the measured plasticized material into the molding mold by controlling the first drive portion to move the plasticizing portion and the measurement injection portion in a direction approaching each other depending on the pressure.

In manufacturing a magnet embedded core, creation of flash, and problems associated with flash are prevented. A device for manufacturing the magnet embedded core comprises a base (32) comprising an upper surface at which a resin pot chamber (64) for storing molten resin opens, a separator plate (36) detachably placed on the upper surface of the base (32) to support a rotor core (2) thereon and having a gate (50) and a cull opening (52) communicating the magnet insertion hole (4) of the rotor core (2) with the resin pot chamber (64), and a plunger (62) movably provided in the resin pot chamber (64) to press the molten resin in the resin pot chamber (64) into the magnet insertion hole (4) via the gate (50) and the cull opening (52), wherein an annular recess (66) is formed on the upper surface of the base (32) so as to extend outward of the resin pot chamber (64) and communicate with the resin pot chamber (64).

A core molding apparatus and a core molding method capable of reducing the possibility of the deterioration in the calculation accuracy of the amount of supply of a raw material for a core are provided. A core molding apparatus includes: a kneading tank configured to knead a raw material for a core; a raw material supply unit configured to supply the raw material to the kneading tank; a mold configured to contain a kneaded material made of the raw material kneaded in the kneading tank and to mold the core; a piston configured to inject the kneaded material contained in the kneading tank into the mold; and a control unit configured to control an amount of supply of the raw material from the raw material supply unit to the kneading tank.

The device for feeding molten plastic material into a molding cavity (30) includes a melting chamber (20) in which metered solid plastic material is introduced, a sonotrode (10) provided for tightly inserting a portion thereof into said melting chamber (20), causing the plastic material to melt by means of vibration, and relative movement of the sonotrode (10) and melting chamber (20) allows driving the molten plastic material inside a molding cavity (30) communicated with said melting chamber (20), the device including resistance sensors (40) allowing an electronic control device (50) to know the resistance that the plastic material has against the movement of the sonotrode (10).

In manufacturing a magnet embedded core, creation of flash, and problems associated with flash are prevented. A device for manufacturing the magnet embedded core comprises a base (32) comprising an upper surface at which a resin pot chamber (64) for storing molten resin opens, a separator plate (36) detachably placed on the upper surface of the base (32) to support a rotor core (2) thereon and having a gate (50) and a cull opening (52) communicating the magnet insertion hole (4) of the rotor core (2) with the resin pot chamber (64), and a plunger (62) movably provided in the resin pot chamber (64) to press the molten resin in the resin pot chamber (64) into the magnet insertion hole (4) via the gate (50) and the cull opening (52), wherein an annular recess (66) is formed on the upper surface of the base (32) so as to extend outward of the resin pot chamber (64) and communicate with the resin pot chamber (64).

An injection molding apparatus includes a plasticizing portion, a measurement injection portion that is disposed between the plasticizing portion and a molding mold, measures the plasticized material, and injects the measured plasticized material into the molding mold, a first drive portion changing a relative position between the plasticizing portion and the measurement injection portion, a pressure detection portion detecting a pressure inside the measurement injection portion and a control portion, in which the measurement injection portion is configured such that a volume of an internal space thereof, in which the plasticized material is stored, changes according to a change in the relative position between the measurement injection portion and the plasticizing portion, and the control portion executes at least one of a measurement operation of causing the measurement injection portion to measure the plasticized material by controlling the first drive portion to move the plasticizing portion and the measurement injection portion in a direction away from each other, and an injection operation of injecting the measured plasticized material into the molding mold by controlling the first drive portion to move the plasticizing portion and the measurement injection portion in a direction approaching each other depending on the pressure.

Provided is a resin molding apparatus that can reduce a variation in a thickness of a resin to be molded. A resin molding apparatus includes: a molding mold having one mold and the other mold; one mold wedge mechanism; and one mold cavity block driving mechanism. In a state that one mold cavity block is moved to a preset height position using the one mold cavity block driving mechanism and a position in a direction away from the other mold in the one mold cavity block having been moved to the height position is fixed to be limited using the one mold wedge mechanism, a resin is injected into one mold cavity, and thereafter resin molding can be performed by changing a depth of the one mold cavity using the one mold wedge mechanism and the one mold cavity block driving mechanism.

A micro moulding machine and process for forming small plastic parts for the medical device industry. The machine adds heat in two steps to a precision sized plastic pellet and then displaces the entire pellet volume into the mould cavity. A substantial amount of heat is added to the pellet by forcing it through an orifice very near the gate of the mould. The pneumatic pressure to drive the pellet through the orifice is controlled to regulate the amount of heat introduced into the pellet.

Disclosed is a method of adjusting a motion profile of a shooting pot plunger for use in a molding system, the shooting pot plunger slidably movable within a shooting pot cavity, the method comprising: sensing a characteristic at a predetermined location in an injection circuit of the molding system; determining that the sensed characteristic is outside of a threshold range; adjusting the motion profile of the shooting pot plunger to account for determining that the sensed characteristic is outside of the threshold range; and storing the adjusted motion profile in a memory.

The device for feeding molten plastic material into a molding cavity (30) includes a melting chamber (20) in which metered solid plastic material is introduced, a sonotrode (10) provided for tightly inserting a portion thereof into said melting chamber (20), causing the plastic material to melt by means of vibration, and relative movement of the sonotrode (10) and melting chamber (20) allows driving the molten plastic material inside a molding cavity (30) communicated with said melting chamber (20), the device including resistance sensors (40) allowing an electronic control device (50) to know the resistance that the plastic material has against the movement of the sonotrode (10).