Patent ID: 7478772

Claim:
A crushing and grinding unit for crushing and grinding liquid-like materials or materials that contain liquid, said unit comprising a coarse-crushing section and a fine-grinding section, wherein said fine-grinding section comprises a stationary grinder and a rotary grinder, said coarse-crushing section is located in a chamber of the stationary grinder, and said coarse-crushing section includes a crushing blade, wherein a gap between the outer side surface of the crushing blade of the coarse-crushing section and the inner surface of the stationary grinder chamber gradually decreases from the leading portion of the blade to the base portion of the blade, thereby a crushing chamber is formed, and wherein the crushing blade includes a main blade area, a transition area and a secondary blade area, outer edges of these areas being defined by broken lines or curved lines, and the connections of said broken lines are smoothly transitioned, said main blade area has an inclination (α) of approximately 100° to 165°, while an inclination (θ) of the secondary blade area is approximately 10° to 70°, and a distance (X) at a feeding inlet of the main blade area is approximately 2 to 15 mm.