Moulding assembly
AssigneeTetra Laval Holdings & Finance S.A.
InventorsHenrik Holm, Klas Sjöberg
Life of this patent
Estimating the term…
Abstract
Moulding assembly (100) with an inlet (117) for receiving raw material to be ejected, a barrel (112) for gathering and processing the raw material received through the inlet (117), a screw (110) for engaging the raw material in the barrel, a first drive unit (170) configured for rotating the screw (110) in order to grind the raw material into liquid form, where the moulding assembly further comprises a second drive unit (120) configured to displace the screw (110) in a direction essentially perpendicular to the rotation direction in and out of the barrel (112) depending on the pressure in the barrel (112).
Claims16
A moulding assembly comprising:
- an inlet configured for receiving raw material to be ejected;
- a barrel configured for gathering and processing the raw material received through the inlet;
- a screw configured for engaging the raw material in the barrel;
- a first drive unit configured for rotating the screw about a first axis extending through the barrel in order to grind the raw material into a liquid form;
- and
- a second drive unit, the second drive unit configured to move the screw along the first axis in and out of the barrel depending on the pressure in the barrel.
A method for moulding a product in a moulding assembly comprising:
- providing raw material through an inlet and into a barrel;
- rotating a screw in the barrel to grind the raw material into molten/liquid form;
- measuring a liquid pressure of the raw material in the barrel;
- comparing the measured liquid pressure value in the barrel with a critical threshold pressure value;
- and
- at least one of adjusting the pressure in the barrel by moving the screw out of the barrel and adjusting the rotational speed of the screw when the critical threshold pressure value has been reached.
Dependencies are inferred from the claim text.