Back to results
US 6,443,670 B1Granted
Powder coating equipment having zero-sum control of conveyance and supplement air lines
AssigneeITW Gema AG
InventorsGerald Haas, Hans Peter Michael
Life of this patent
Estimating the term…
Abstract
Powder-coating equipment comprises two throttles (6, 16) each mounted in one of a conveyance-air line (8) and a supplemental-air line (18). The throttles' flow impedance’ are adjustable in a motorized manner by providing throttle with its own adjustment motor (4, 14). The adjustment motors, such as electric stepping motors and/or servo-motors are driven by an electronic control unit (2).
Claims20
Coating equipment, comprising:
- a container for containing a coating material;
- an injector communicated with said container;
- a conveyance-air line and at least one supplemental air line connected to said injector and supplying conveyance air and supplemental air, respectively, to said injector for pneumatically sucking the coating material from said container into said injector and moving the sucked coating material toward an object to be coated;
- a plurality of throttles each mounted in one of the conveyance-air line and the at least one supplemental-air line and equipped with an adjustment motor for adjusting a cross section of said throttle, and hence, an air flow of said line;
- and
- an electronic control unit that electrically and mutually adjusts the adjustment motors of all said throttles as a function of a setpoint of a volumetric total air flow of the conveyance air and the supplemental air, and as a function of a setpoint of a material rate at which the coating material is to be applied to said object.
3 more elements
Powder-coating equipment, comprising:
- a container for containing a coating powder;
- an injector communicated with said container;
- a conveyance-air line and at least one supplemental air line connected to said injector and supplying conveyance air and supplemental air, respectively, to said injector for pneumatically sucking the coating powder from said container into said injector and moving the sucked coating powder toward an object to be coated;
- a plurality of throttles each mounted in one of the conveyance-air line and the at least one supplemental-air line and equipped with an adjustment motor for adjusting a flow impedance of said line;
- and
- an electronic control unit that electrically and mutually adjusts the adjustment motors of all said throttles as a function of a setpoint of a volumetric total air flow of the conveyance air and the supplemental air, and as a function of a setpoint of a powder rate at which the coating powder is to be applied to said object;
- wherein the adjustment motors are electrical stepping motors.
4 more elements
Powder-coating equipment, comprising:
- a container for containing a coating powder;
- an injector communicated with said container;
- a conveyance-air line and at least one supplemental air line connected to said injector and supplying conveyance air and supplemental air, respectively, to said injector for pneumatically sucking the coating powder from said container into said injector and moving the sucked coating powder toward an object to be coated;
- a plurality of throttles each mounted in one of the conveyance-air line and the at least one supplemental-air line and equipped with an adjustment motor for adjusting a flow impedance of said line;
- and
- an electronic control unit that electrically and mutually adjusts the adjustment motors of all said throttles as a function of a setpoint of a volumetric total air flow of the conveyance air and the supplemental air, and as a function of a setpoint of a powder rate at which the coating powder is to be applied to said object;
- wherein the adjustment motors are servo-motors.
4 more elements
Dependencies are inferred from the claim text.