Seamless model and method of making a seamless model

• Main Authors: BROAD RICHARD MARTIN, WOMBWELL PAUL TERRENCE, BADCOCK WILLIAM WALTER CHARLES, KOTNIS MAHESH ARVIND, OTLOSKI ELIZABETH LOUISE
• Format: Patent
• Language: Chinese; English
• Published: 27.08.2008
• Subjects: ADVERTISING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE; CASTING; CHEMISTRY; COMPOSITIONS BASED THEREON; CRYPTOGRAPHY; DECORATIVE ARTS; DIAGRAMS; DISPLAY; EDUCATION; EDUCATIONAL OR DEMONSTRATION APPLIANCES; FOUNDRY MOULDING; GENERAL PROCESSES OF COMPOUNDING; GLOBES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MOSAICS; ORGANIC MACROMOLECULAR COMPOUNDS; PAPERHANGING; PERFORMING OPERATIONS; PHYSICS; PLANETARIA; POWDER METALLURGY; PRODUCING DECORATIVE EFFECTS; SEALS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TARSIA WORK; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The present disclosure relates to a seamless model free of bond lines made by a method which includes the steps of providing a substructure having an exposed outer surface, applying a modeling paste to the outer surface of the substructure in the form of a continuous layer, curing the continuous layer of applied modeling paste, and machining said cured layer of modeling paste to the desired contour to form the seamless model. The modeling paste may be a mechanically frothed syntactic foam prepared by injecting inert gas with mechanical stirring into either a formed froth-forming polyurethane or epoxy composition containing microballoons.