The invention discloses a freezing
mechanical crushing device suitable for preparing a
laser printer developer. The freezing
mechanical crushing device comprises a crushing cavity, a feeding pipeline, a freezing
airflow pipeline and a grading unit, wherein a feeding port and a discharging port are formed in the two ends of the crushing cavity, and the feeding pipeline and the freezing
airflow pipeline are communicated with the feeding port; the grading unit comprises a grading cavity, a material conveying pipeline and a material returning pipeline, the grading cavity is provided with a material conveying opening, a material discharging opening and a material returning opening, the material conveying pipeline is communicated with the material feeding opening and the material conveying opening, and the material returning pipeline is communicated with the material returning opening and the material supplying pipeline and / or the material feeding opening. On one hand, based on mixing of materials and freezing
airflow, crushing is performed by improving the
brittleness of the materials, the crushing quality of the materials is effectively improved, and the
sphericity of material particles is greatly improved; and on the other hand, crushing and grading are combined, materials can be continuously crushed and recovered in a grading manner, remaining materials can be circularly crushed,
continuous production is achieved,
energy consumption is low, production efficiency is high, and in addition, the structure is simple, operation is convenient, and input cost is low.