Analysis of Stress Distribution for Powder Compression Molding by Finite Element Method

Abstract

The ultrasonic mold was designed for the ceramic powder compression. CAD and CAE were used in the design to analyze the mold strength and its natural frequency. The study of stress distribution and compression in upper and lower punch, mold body and waveguide comparison of stresses was analyzed by FEA experiments under maximum compression at 50,000 N to validate the results of both methods and the mold natural frequency. The difference between FEA and experimental analysis was 3-7%, acceptable. The redesign results in a cylindrical mold body with the outer diameter of 80 mm, the height of 100 mm, and the upper punch of 125 mm in length. The six sides are 26 mm of the high waveguide with 100 mm height. The internal and external diameters are 80 and 110 mm, respectively. The mold has been redesigned and can support the maximum compression force of 1,500 kN. with the bearing steel, AISI 52100, obtainable hardness 65 HRC, the stress concentration occurs at the neck of the upper punch using the ultrasonic at 12.00 to 12.45 kHz.

Formation of Fly Ash Catalysts and Selection of a Matrix Binder and Its Application in Denitration

“…In fact, the powder molding process is a complicated combination of the shape, particle size, particle size distribution, density, pore structure, fluidity, and other physical properties of the powder material . Catalyst molding methods are mainly composed of the following four processes: compression, extrusion molding method, rotational molding method, and spray molding method . In particular, the extrusion molding method is also a widely used catalyst molding process .…”

“…14 Catalyst molding methods are mainly composed of the following four processes: compression, extrusion molding method, rotational molding method, and spray molding method. 15 In particular, the extrusion molding method is also a widely used catalyst molding process. 16 It mainly combines catalyst powder and a certain amount of water with extra additives.…”