COBEM99

SR26 Reologia

Title:

STUDY ON THE VISCOSITY OF A CARNAUBA WAX-BASED ORGANIC VEHICLE FOR CERAMIC INJECTION MOULDING

Summary :

ABSTRACT. THIS WORK PRESENTS A STUDY ON THE TECHNICAL VIABILITY OF A CARNAUBA WAX-BASED ORGANIC VEHICLE (VO) FOR THE LOW-PRESSURE INJECTION MOULDING (0,6MPA) OF METALLIC AND CERAMIC PARTS. THE ORGANIC VEHICLE DEVELOPED WAS USED FOR THE INJECTION OF CERAMIC THREAD-GUIDES. ALL MATERIALS ARE READILY AVAILABLE IN THE LOCAL MARKET. VISCOSITY TESTS WERE EMPLOYED TO DETERMINE THE RELATIVE AMOUNTS OF THE ORGANIC VEHICLE COMPONENTS (CARNAUBA WAX, LOW-DENSITY POLYETHYLENE AND STEARIC ACID) AS WELL AS THE OPTIMUM POWDER CONTENT IN THE CERAMIC MIX. VISCOSITY WAS MEASURED WITH A BROOKFIELD LV-DVIII RHEOMETER. A DOUBLE CAVITY MOLD FOR THE INJECTION OF SIMPLE THREAD-GUIDES WAS DESIGNED AND BUILT USING LOW-CARBON STEEL. PRELIMINARY RESULTS DEMONSTRATE THE POTENTIAL OF BOTH THE PROCESS AND THE VEHICLE DEVELOPED FOR THE MASS-PRODUCTION OF SMALL AND COMPLEX CERAMIC PARTS. KEYWORDS: MOULDING, INJECTION, CERAMICS

Author :

Bezerra, Alexandre Campos
de Sousa, Maria Rosimar
Nogueira, Ricardo Emílio F. Quevedo
Santos, Francisco C.

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