Investigations on cold pressing forming technology applied to valve core manufacturing are conducted based on processing concept and die design principles.

Inner ratchet's cold extrusion process design and numerical simulation

Marc-the software of finite element,the numerical analysis was carried out using 3-D rigid-plastic finite element explicit arithmetic,to simulate the process of cold extrusion of the accumulator electrode,and the flow state of deformation materials and the equivalent plasticity strain distribution law were obtained.

The effect of silicon carbide particle distribution on extrusion paste's rheological property and green bodies' density were investigated by changing the volume fraction of different particles.

By constructing model,the movement and dynamics of ceramics pastes were analyzed during extrusion process.

The electrode samples were prepared with high softening-point modified pitch as binder via a procedure that includes three steps: extrusion under different conditions, baking and graphitization treatment.

By adopting plastic admixture, homogenization of the body batch,extrusion molding, micro-wave drying,sintering to net size and so on,the products attain good using effects.

The mould structure for extrusion molding of brass cartridge part and the related technology are also introduce

But continuum extrusion molding can reduce the mete of using water,reduce flotsam,carry out automatism,improve production and ensure the quality.