An injection molding apparatus and method of fabricating a molded part are provided. The apparatus may include a barrel, a nozzle enclosing an end of the barrel and defining an opening in fluid communication with an inside of the barrel, and an extrusion screw positioned at least partially inside the barrel and rotatable relative to the barrel. The extrusion screw may include a screw tip. Relative axial movement between the barrel and the extrusion screw may open or close the opening of the nozzle to permit or prevent, respectively, material flow through the opening of the nozzle. The method may include clamping a mold, opening a nozzle, rotating the extrusion screw to pump a molten material into the mold until the mold is filled, closing the nozzle, and unclamping the mold to release a molded part.

An injection molding apparatus and method of fabricating a molded part are provided. The apparatus may include a barrel, a nozzle enclosing an end of the barrel and defining an opening in fluid communication with an inside of the barrel, and an extrusion screw positioned at least partially inside the barrel and rotatable relative to the barrel. The extrusion screw may include a screw tip. Relative axial movement between the barrel and the extrusion screw may open or close the opening of the nozzle to permit or prevent, respectively, material flow through the opening of the nozzle. The method may include clamping a mold, opening a nozzle, rotating the extrusion screw to pump a molten material into the mold until the mold is filled, closing the nozzle, and unclamping the mold to release a molded part.

A flow rate adjusting device includes a main body portion having a first opening portion to which a molten material is supplied, a second opening portion from which the molten material is discharged, a supply flow path communicating with the first opening portion and the second opening portion, and a cross hole intersecting the supply flow path; and a shaft-shaped valve portion disposed inside the cross hole. The valve portion has a tip end portion, a rear end portion, and a recessed portion provided between the tip end portion and the rear end portion and communicating with the first opening portion and the second opening portion, and the valve portion is rotated in the cross hole to change a position of the recessed portion, such that a flow path cross-sectional area of the supply flow path is changed to adjust a flow rate of the molten material discharged from the second opening portion; a storage chamber storing a part of the molten material flowing through the supply flow path between the first opening portion and the valve portion is defined by the tip end portion and an inner wall surface of the cross hole; the valve portion has a first contact surface provided between the recessed portion and the rear end portion and facing the rear end portion side; and the main body portion has a second contact surface to come into contact with the first contact surface from the tip end portion side.

A flow rate adjusting device includes a main body portion having a first opening portion to which a molten material is supplied, a second opening portion from which the molten material is discharged, a supply flow path communicating with the first opening portion and the second opening portion, and a cross hole intersecting the supply flow path; and a shaft-shaped valve portion disposed inside the cross hole. The valve portion has a tip end portion, a rear end portion, and a recessed portion provided between the tip end portion and the rear end portion and communicating with the first opening portion and the second opening portion, and the valve portion is rotated in the cross hole to change a position of the recessed portion, such that a flow path cross-sectional area of the supply flow path is changed to adjust a flow rate of the molten material discharged from the second opening portion; a storage chamber storing a part of the molten material flowing through the supply flow path between the first opening portion and the valve portion is defined by the tip end portion and an inner wall surface of the cross hole; the valve portion has a first contact surface provided between the recessed portion and the rear end portion and facing the rear end portion side; and the main body portion has a second contact surface to come into contact with the first contact surface from the tip end portion side.

A molding apparatus includes a plurality of axially extending extruders. Each of the extruders is fluidly connectable with a common mold whereby the mold may be concurrently filled from each of the extruders. Each of the extruders has a feed inlet, and the feed inlets are axially spaced from each other. Another molding apparatus includes a plurality of axially extending extruders, and a heated conduit in flow communication with the extruders. The heated conduit is connectable to a mold, whereby the mold may be concurrently fillable from each of the extruders.

A molding apparatus includes a plurality of axially extending extruders. Each of the extruders is fluidly connectable with a common mold whereby the mold may be concurrently filled from each of the extruders. Each of the extruders has a feed inlet, and the feed inlets are axially spaced from each other. Another molding apparatus includes a plurality of axially extending extruders, and a heated conduit in flow communication with the extruders. The heated conduit is connectable to a mold, whereby the mold may be concurrently fillable from each of the extruders.

A system and method of creating tableware includes blending wood particles with plastic to create a wood and plastic blend. The wood and plastic blend is then pressure injected into a mold to create a wood and plastic blend tableware. The wood and plastic blend tableware is then removed from the mold.

A plasticization device includes a screw configured to rotate around a rotation axis and including a groove forming surface on which a groove channel in which a groove extends spirally is formed; a heating unit configured to heat the material supplied to the groove channel; and a barrel including a facing surface that faces the groove forming surface and that is provided with a discharge port through which the molten material is to be discharged due to rotation of the screw and due to heating of the heating unit. The groove is defined by a first side wall portion, a second side wall portion provided at a position farther from the rotation axis than the first side wall portion, and a bottom surface portion coupled between the first side wall portion and the second side wall portion. The groove of the groove channel has an interval between the first side wall portion and the second side wall portion that becomes narrower as a distance from the bottom surface portion along the rotation axis increases.

A plasticization device includes a screw configured to rotate around a rotation axis and including a groove forming surface on which a groove channel in which a groove extends spirally is formed; a heating unit configured to heat the material supplied to the groove channel; and a barrel including a facing surface that faces the groove forming surface and that is provided with a discharge port through which the molten material is to be discharged due to rotation of the screw and due to heating of the heating unit. The groove is defined by a first side wall portion, a second side wall portion provided at a position farther from the rotation axis than the first side wall portion, and a bottom surface portion coupled between the first side wall portion and the second side wall portion. The groove of the groove channel has an interval between the first side wall portion and the second side wall portion that becomes narrower as a distance from the bottom surface portion along the rotation axis increases.

1. A plasticizing device includes a barrel including a resin material supply port portion and a fiber supply port portion which is formed on a distal side from the resin material supply port portion; and a screw that comprises a shaft body and a flight, and is received in the barrel. The barrel is disposed with a posture in which its axial line intersects a gravitational direction. A maximum length of an opening in the barrel of the fiber supply port portion along an axial direction of the barrel is 1 time or more and 2 times or less as much as a pitch of the flight disposed in a portion of the screw which faces the opening in the barrel of the fiber supply port portion in a direction perpendicular to the axial line of the barrel.