×

Liquifier pump control in an extrusion apparatus

  • US 6,814,907 B1
  • Filed: 12/18/2001
  • Issued: 11/09/2004
  • Est. Priority Date: 12/18/2001
  • Status: Active Grant
First Claim
Patent Images

1. In an extrusion apparatus having an extrusion head including a liquifier which receives a solid element of a modeling material, heats the modeling material, and outputs a flow of the modeling material at an output flow rate while the extrusion head moves along a predetermined tool path at an extrusion head velocity, the apparatus using a material advance mechanism to supply the solid element of modeling material to the liquifier at an input rate which controls the output flow rate, a method for controlling the output flow rate comprising:

  • determining an extrusion head velocity profile based on the tool path; and

    controlling the input rate of modeling material to the liquifier to produce an output flow rate of modeling material from the liquifier that is proportional to a current extrusion head velocity corresponding to the extrusion head velocity profile.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×