Provided are a molding screw and an FBI molding machine using the same for manufacturing resin molded articles for reduced manufacturing variation with use of a resin powder, an additive, and a mixture material constituted by an inorganic material or an organic material. The molding screw can include a feeding portion for feeding a molding material, a compressing portion, and a metering portion that extend continuously from the feeding portion. The feeding portion and the compressing portion each can be provided with a spiral flight. The flight of the compressing portion can include multiple sub flights that extend in a spiral manner in a screw axis direction. The sub flights can each have a polygonal shape with rounded corner portions, and are arranged such that the corner portions are shifted by a set angle with respect to the screw axis.

To prevent creation of unnecessary resin when fixing a magnet with resin, a manufacturing method for manufacturing a magnet embedded core comprises: a placing step of placing the rotor core on a mounting table such that an end surface of the rotor core is in contact with the mounting table; a resin charging step of charging the resin in solid state into the magnet insertion hole; a melting step of inciting the resin in the magnet insertion hole; a magnet inserting step of inserting the magnet into the magnet insertion hole; a closure step of closing the opening of the magnet insertion hole remote from the mounting table; and a resin pressurizing step of pressurizing the molten resin that has flowed into a buffer chamber formed in the mounting table from the opening of the magnet insertion hole on a side of the mounting table following the closure step.

To prevent creation of unnecessary resin when fixing a magnet with resin, a manufacturing method for manufacturing a magnet embedded core comprises: a placing step of placing the rotor core on a mounting table such that an end surface of the rotor core is in contact with the mounting table; a resin charging step of charging the resin in solid state into the magnet insertion hole; a melting step of inciting the resin in the magnet insertion hole; a magnet inserting step of inserting the magnet into the magnet insertion hole; a closure step of closing the opening of the magnet insertion hole remote from the mounting table; and a resin pressurizing step of pressurizing the molten resin that has flowed into a buffer chamber formed in the mounting table from the opening of the magnet insertion hole on a side of the mounting table following the closure step.

An improved heater band for a hot runner injection molding machine. The heater band includes a cylindrical sleeve adapted to be disposed about a nozzle body in combination with a first wire heating element and a second wire heating element. The first wire heating element includes two contact terminals and an intermediate portion therebetween. The intermediate portion of the first wire heating element is disposed within the cylindrical sleeve. The second wire heating element includes two contact terminals and an intermediate portion therebetween. The intermediate portion of the second wire heating element is also disposed within the cylindrical sleeve. The intermediate portions of the heating elements are adjacent to and axially offset from one another within the cylindrical sleeve. The first wire heating element and the second wire heating element can be alternatively connected to an electrical power supply to extend the operational life of the heater band.

An improved heater band for a hot runner injection molding machine. The heater band includes a cylindrical sleeve adapted to be disposed about a nozzle body in combination with a first wire heating element and a second wire heating element. The first wire heating element includes two contact terminals and an intermediate portion therebetween. The intermediate portion of the first wire heating element is disposed within the cylindrical sleeve. The second wire heating element includes two contact terminals and an intermediate portion therebetween. The intermediate portion of the second wire heating element is also disposed within the cylindrical sleeve. The intermediate portions of the heating elements are adjacent to and axially offset from one another within the cylindrical sleeve. The first wire heating element and the second wire heating element can be alternatively connected to an electrical power supply to extend the operational life of the heater band.

The invention relates to a method for the online sensing of the rheology of thermoplastic and/or elastomer material for the production of injection-molded parts, wherein a measuring tool (6) is arranged in an injection-molding machine (1) between the stationary clamping plate (2) and the movable clamping plate (3) thereof instead of a mold die, wherein the measuring tool (6) comprises a measuring channel (13), in the course of which at least two pressure sensors (16) and at least two temperature sensors (17) are arranged, which transfer corresponding measured values of the material injected by means of an injection assembly (5) into the measuring channel (13) to a programmable logic controller (PLC) belonging to the injection-molding machine (1), with these measured values being processed by means of an algorithm in the PLC, evaluated and made available for the actual injection process.

The invention relates to a method for the online sensing of the rheology of thermoplastic and/or elastomer material for the production of injection-molded parts, wherein a measuring tool (6) is arranged in an injection-molding machine (1) between the stationary clamping plate (2) and the movable clamping plate (3) thereof instead of a mold die, wherein the measuring tool (6) comprises a measuring channel (13), in the course of which at least two pressure sensors (16) and at least two temperature sensors (17) are arranged, which transfer corresponding measured values of the material injected by means of an injection assembly (5) into the measuring channel (13) to a programmable logic controller (PLC) belonging to the injection-molding machine (1), with these measured values being processed by means of an algorithm in the PLC, evaluated and made available for the actual injection process.

A gap control part controls a clamping device so that mating surfaces in a die face each other across a gap, and thereby a cavity and an external part of the die communicate across the gap. A molten metal feed control part controls a molten metal feed device so as to feed molten metal into a sleeve when the gap is being maintained. An injection control part controls an injection device so as to start a forward movement of a plunger at a time when the gap is maintained and there is the molten metal in the sleeve. A clamping control part controls a clamping device so as to make the mating surfaces abut against each other to eliminate the gap after the forward movement of the plunger is started and before the molten metal reaches a molten metal surface height at which the molten metal flows into the gap.

An injection molding apparatus includes: a first upstream mold formed with a first gate opening into which a first molding material flows; a second upstream mold formed with a second gate opening into which a second molding material flows; a first injection unit configured to inject the first molding material; a second injection unit configured to inject the second molding material; and a downstream mold configured to be clamped to each of the first upstream mold and the second upstream mold. The first injection unit includes a plasticizing mechanism that plasticizes at least a part of a thermoplastic material containing a thermoplastic resin to generate the first molding material. The second injection unit includes a mechanism that mixes a resin and a curing agent to generate the second molding material that is a thermosetting mixture.

An injection molding apparatus includes: a first upstream mold formed with a first gate opening into which a first molding material flows; a second upstream mold formed with a second gate opening into which a second molding material flows; a first injection unit configured to inject the first molding material; a second injection unit configured to inject the second molding material; and a downstream mold configured to be clamped to each of the first upstream mold and the second upstream mold. The first injection unit includes a plasticizing mechanism that plasticizes at least a part of a thermoplastic material containing a thermoplastic resin to generate the first molding material. The second injection unit includes a mechanism that mixes a resin and a curing agent to generate the second molding material that is a thermosetting mixture.