How to distinguish between soft plastic, semi-hard plastic and hard plasticity de-airing extruder

How to distinguish between soft plastic, semi-hard plastic and hard plasticity de-airing extruder

According the extruding pressure, classify de-airing extruder as below on international basis:
(1) Soft plasticity de-airing extruder: actual extruding pressure is 0.4~1.8MPa
(2) Semi-hard plasticity de-airing extruder: actual extruding pressure 1.8~2.5MPa
(3) Hard plasticity de-airing extruder: actual extruding pressure exceeds 2.5MPa, Max.pressure meet 8.0MPa.
Above date is from Handle German.
According extruding moisture, classify de-airing extrude pressure as below:
(1) America
Classify de-airing extruder as hard plasticity and soft plasticity 2 kinds. Classify principle is according to extruding moisture and brick or tile firing method.
A. Soft plasticity de-airing extruder: extruding moisture is around 12~20%, the extruded green adobe do not have enough strength, they must drying then load to kiln car for firing.
B. Hard plasticity de-airing extruder: extruding moisture is around 12~20%, the extruded green adobe do have enough strength, they will not distortion when setting height with 2 meters, can directly load to kiln car for drying and firing.
(2) German
Classify de-airing extruder as hard plasticity, semi-hard plasticity and soft plasticity 3 kinds:
A. Soft plasticity de-airing extruder: extruding moisture is around 19~27%;actual extruding pressure is 0.4~1.8MPa; green tile strength is 2kg/c m3
B. Semi hard de-airing extruder: extruding moisture is around 15~20%;actual extruding pressure is 1.8~2.5MPa; green tile strength is 2~3kg/cm3
C. Hard plasticity de-airing extruder: extruding moisture is around 12~16%, actual extruding pressure is 2.5~4.5MPa; green tile strength exceed 3kg/cm3
(3) China
No strictly classification, I prompt:
A. Soft plasticity de-airing extruder: extruding moisture exceed 18% which is normal clay roofing tile, split tile, terracotta facade, ceramic plate extruding moisture.
B. Hard plasticity de-airing extruder: extruding moisture between 12%~16% which is normal clay bricks extruding moisture.In fact, almost all clay bric making machine process material with this moisture.

23
12月
posted in: Clay roofing tile by