Charles A Ammons

US Patent:

20080025139, Jan 31, 2008

Filed:

Jul 12, 2007

Appl. No.:

11/776957

Inventors:

Joseph Ferencz - Litchfield OH, US
Charles Ammons - Brook Park OH, US
Gregory Denk - Olmsted Twp. OH, US

International Classification:

B29B 7/24

US Classification:

366076100

Abstract:

A method of making thermosetting powder coating compositions utilizing an extruder system including an extruder body and an injection system is disclosed. Particulate additives such as pigments are mixed with base material such as thermoset resins in the extruder. The extruder body includes segments surrounding one or more rotating screws. A first segment's main inlet receives material, such as from a pre-mix hopper, and a final segment's outlet discharges extrudate. A low pressure injector injects the particulate additives, particularly those that are hard to incorporate, into one or more segments at one or more injection positions at the main inlet or between the main inlet and the outlet. The injector includes a source of pressurization coupled to a pressure vessel, a pressure regulator maintaining the pressure at or below a given level, a flow regulator, and an injection port. A sensor adjacent the outlet monitors the physical characteristics of the extrudate and is coupled to a controller of the low pressure injector for dynamic control thereof.

US Patent:

20050213423, Sep 29, 2005

Filed:

Mar 25, 2004

Appl. No.:

10/809639

Inventors:

Joseph Ferencz - Litchfield OH, US
Charles Ammons - Brook Park OH, US
Gregory Denk - Olmsted Twp. OH, US

International Classification:

B29B007/24
B29B007/60
B29C047/10

US Classification:

366076200

Abstract:

A thermosetting powder coating composition extruder system including an extruder body and an injection system is disclosed. The extruder body includes segments surrounding one or more rotating screws. A first segment's main inlet receives material, such as from a pre-mix hopper, and a final segment's outlet discharges extrudate. A low pressure injector injects additives, particularly those that are hard to incorporate, into one or more segments at one or more injection positions at the main inlet or between the main inlet and the outlet. The injector includes a source of pressurization coupled to a pressure vessel, a pressure regulator maintaining the pressure at or below a given level, a flow regulator, and an injection port. A sensor adjacent the outlet monitors the physical characteristics of the extrudate and is coupled to a controller of the low pressure injector for dynamic control thereof.