Injection molding machine with viscosity measuring function and method for measuring viscosity using injection molding machine
AssigneeFanuc Corporation
InventorAkira OOMORI
Life of this patent
Estimating the term…
Abstract
A nozzle is attached to a heating cylinder via a nozzle adapter. A sensor for pressure measurement is attached to the nozzle adapter. A molten resin is injected into the air with a front of the nozzle open, and a resin pressure is measured by pressure measuring unit while the molten resin is being injected into the air. Based on the resin pressure, the viscosity of the injected molten resin is determined.
Claims9
An injection molding machine configured to melt a resin in a heating cylinder and then move a screw or a plunger forward to inject the molten resin through a nozzle, the injection molding machine comprising:
- a nozzle adapter attached between a tip portion of the heating cylinder and the nozzle to provide a molten resin channel that connects the heating cylinder to the nozzle;
- a pressure measuring unit configured to measure a resin pressure in the nozzle adapter;
- and
- a molten resin injecting unit configured to inject the molten resin into air with a front of the nozzle open,
- the injection molding machine further comprising:
- a viscosity determining unit configured to determine viscosity of the injected molten resin based on the resin pressure measured by the pressure measuring unit while the molten resin injecting unit is injecting the molten resin into the air.
A method for measuring resin viscosity using an injection molding machine configured to melt a resin in a heating cylinder and then moves a screw or a plunger forward to inject the molten resin through a nozzle, the method comprising:
- measuring the resin pressure when the molten resin is injected into air with a front of the nozzle open, using pressure measuring unit configured to measure a resin pressure in a nozzle adapter attached between a tip portion of the heating cylinder and the nozzle to provide a molten resin channel that connects the heating cylinder to the nozzle;
- determining viscosity of the injected molten resin based on the measured resin pressure.
Dependencies are inferred from the claim text.