Co core block forming mould and preparing process thereof

The invention discloses a cobalt block forming module that includes rubber model and steel model. In the steel model, rubber module is installed. Cobalt powder is filled in the pore space of the rubber module. Upper and down blocks are installed in the top and bottom hatches of the pore. And upper and down buffers are installed on top surface and bottom surface of rubber model. Upper and down stampings are installed on the top surface and bottom of buffers. Bearing base is installed on stamping bottom. The cobalt block technology includes the following steps: weighing cobalt and poly-ethyl alcohol according to 100: 0.2-0.3; dissolving poly-ethyl alcohol in deionized water and mixing with cobalt powder to make wet powder, drying for 20-25h in vacuum at 80-100 degree centigrade, briquettingto block at 12-15MPa pressure, grinding powder to cobalt power that has the granularity under 0.18mm; taking high temperature sintering in H2 atmosphere in mould and pressurizing, taking acid washing,alkali washing and nickel