Apparatus for adjusting the thickness of a resin film exiting an extrusion lip of a blown film extruder
AssigneeElectronic Systems S.P.A.
InventorsTrizzino Stefano, Martena Florinda
Life of this patent
Estimating the term…
Abstract
The invention provides an appartus for adjusting the thickness of a resin film exiting an extrusion lip of a blown film extruder, the apparatus comprising: a gear motor configured to provide a rotational movement in any one of two directions; an actuation unit connected with a first side to the gear motor and with a second side to the extrusion lip, wherein the actuation unit is configured to convert the rotational movement of the gear motor into an axial movement, and wherein the actuation unit is further configured to adjust a local width of the extrusion lip by the axial movement for adjusting the thickness of the resin film exiting the extrusion lip of the blown film extruder.
Claims12
An apparatus for adjusting a thickness of a resin film exiting an extrusion lip of a blown film extruder, the apparatus comprising:
- a gear motor configured to provide a rotational movement in either of two directions;
- an actuation unit connected on a first side to the gear motor and on a second side to the extrusion lip;
- and
- a base ring having two guide protrusions connected thereto, the actuation unit being fixedly located between the two guide protrusions,
- wherein the actuation unit further comprises a threaded shaft, at least one hinge and an adjustable rod,
- wherein the threaded shaft is connected to the gear motor and the at least one hinge, wherein the at least one hinge is connected to the adjustable rod and wherein the adjustable rod is connected to the extrusion lip,
- wherein the actuation unit is configured to convert the rotational movement of the gear motor into an axial movement, and
- wherein the actuation unit is further configured to adjust a local width of the extrusion lip by the axial movement thereby adjusting the thickness of the resin film exiting the extrusion lip of the blown film extruder.
A system for adjusting a thickness of resin film exiting an extrusion lip of a blown film extruder, the system comprising:
- the extrusion lip for the blown film extruder configured to create resin film of a predetermined thickness;
- and
- at least one apparatus for adjusting the thickness of the resin film exiting the extrusion lip, the apparatus comprising:
- a gear motor configured to provide a rotational movement in either of two directions about an axis;
- an actuation unit comprising at least one hinge and a rod;
- a mechanical joint connected to the actuation unit and arranged to connect to the extrusion lip;
- and
- a base ring having two guide protrusions connected thereto, the actuation unit being fixedly located between the two guide protrusions,
- wherein the at least one hinge and the rod are connected between the gear motor and the mechanical joint along the axis,
- wherein the actuation unit is configured to convert the rotational movement of the gear motor into an axial movement in the direction of the axis, and
- wherein the actuation unit is further configured to adjust a local width of the extrusion lip by the axial movement in the direction of the axis.
Dependencies are inferred from the claim text.