Extruder
AssigneeOmachron Intellectual Property Inc.
InventorWayne Ernest Conrad
Life of this patent
Estimating the term…
Abstract
An extruder has a barrel extending from a feed inlet end to an extruder outlet end. The barrel has an inner surface, an outer surface, and a wall thickness between the inner and outer surfaces. The extruder also has at least one heating member positioned provided on the barrel; a screw drive motor drivingly connected to a rotatably mounted screw positioned within the barrel, whereby the screw is rotatable at various revolutions per minute (RPM); and a controller is operably connected to the screw drive motor to adjust the RPM of the screw based upon a temperature of material passing through and/or being extruded from the barrel. Methods for operating an extruder filling a mold are also provided.
Claims22
An extruder comprising:
- a) a barrel extending from a feed inlet end to an extruder outlet end, the barrel having an inner surface, an outer surface and a wall thickness between the inner and outer surfaces;
- b) at least one barrel heater positioned exterior to the barrel;
- c) a screw drive motor drivingly connected to a rotatably mounted screw positioned within the barrel, the screw having a length from the feed inlet end of the barrel to the extruder outlet end of the barrel and the length has a single flight having a plurality of threads, whereby the screw is rotatable at various revolutions per minute (RPM), the screw is a flow inducing member that delivers plastic to a mold;
- and
- d) a controller operably connected to the screw drive motor to adjust the RPM of the screw based upon a temperature of material passing through and/or being extruded from the barrel
- wherein the barrel has a section that has a diameter of up to 2.405 inches in which solid feed material is liquefied that is operated at a pressure of 10-200 psi,
- wherein a flight clearance between the inner surface of the barrel and an outer extent of the flight is from 0.005 to 0.04 inches, and
- wherein the single flight has a flight depth from an outer lateral extent of the flight to an inner lateral extent that is generally constant and a flight width that is generally.
An extruder comprising:
- a) a barrel extending from a feed inlet end to an extruder outlet end, the barrel having an inner surface, an outer surface and a wall thickness between the inner and outer surfaces;
- b) at least one barrel heater positioned exterior to the barrel;
- c) a screw drive motor drivingly connected to a rotatably mounted screw positioned within the barrel, the screw having a length and a flight having a plurality of threads thereon, whereby the screw is rotatable at various revolutions per minute (RPM) and is a sole flow inducing member that delivers plastic to a mold;
- and
- d) a controller operably connected to the screw drive motor to adjust the RPM of the screw based upon a temperature of material passing through and/or being extruded from the barrel
- wherein the barrel has a section that has a diameter of up to 2.405 inches in which solid feed material is liquefied that is operated at a pressure of 10-200 psi,
- wherein a flight clearance between the inner surface of the barrel and an outer extent of the flight is from 0.005 to 0.04 inches, and
- wherein a flight depth from an outer lateral extent of the flight to an inner lateral extent of the flight along the length of the screw is generally constant and a flight width is generally constant along the length of the screw.
Dependencies are inferred from the claim text.