| 摘要 |
PROBLEM TO BE SOLVED: To release a carbon black press molding from a die without producing the lamellar destruction by releasing the carbon black press molding from a mold under a pressurizing state. SOLUTION: A carbon black powder 4 having 0.1-0.2g/cm<3> is packed into a metallic mold surrounded with a piston 1, a die 2 and a lower punch 3 and pressed at 1-250kgf/cm<2> to obtain the carbon black molding having 0.4-1.2g/cm<3> density. Next, the carbon black molding is released by moving the die 2 downward and pressing with the position 1 at 0.01-5kgf/cm<2> . |
