WESLEY WALLACE ROBERTS
Pilots at N6398 County Rd Q, Lake Mills, WI
License number
Wisconsin A1605075
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
N6398 County Road Q, Lake Mills, WI 53551
Professional information
Thermoforming Machine With Controlled Cooling Station
US Patent:
5620715, Apr 15, 1997
Filed:
Feb 10, 1994
Appl. No.:
8/195299
Inventors:
James P. Hart - Portage WI
Wesley W. Roberts - Lake Mills WI
Charles G. Geurts - Cambria WI
Wesley W. Roberts - Lake Mills WI
Charles G. Geurts - Cambria WI
Assignee:
Penda Corporation - Portage WI
International Classification:
B29C 5142
US Classification:
425143
Abstract:
A four-station rotary thermoformer has a rotary carriage which transports a sheet of thermoplastic material clamped on a subframe through a load/unload station; a heating station; a forming station where the sheet is molded; and a cooling station removed from the mold where the part is cooled on the subframe. The molded sheet is cooled in a cavity which has a lower portion mounted on a lift which travels vertically to engage against an upper portion and enclose the sheet for cooling. A multiplicity of air vents discharge cooling air into the cavity. Cooling air leaves the cavity through recirculation duct. The supply of air within the cooling cavity results in a uniform current of air against the article's surface, thus providing uniform cooling. A programmable controller controls the supply of cooling air and receives input from an infrared sensor which detects the temperature of the thermoformed article and also receives information from a sensor of the cooling air temperature. The programmable controller is programmed to provide a cooling cycle consisting of a three-parts.