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Control of water content in molding
06-19
Control of water content in molding
You can use a rapid moisture analyzer, or immediately weigh the freshly cut wet blank on site, record it, and record the extruder at that time.'The load current of the lower motor and the number of cuts per minute of the cutting machine. The wet blank is placed in a square plate in the laboratory, chopped and put into a drying oven to dry to constant weight (dry thoroughly). The weight difference between the two is the mass of the molding water, divided by the weight of the wet blank is the relative molding moisture content (or wet base moisture content), and divided by the dry blank mass is the absolute molding moisture content (or dry base moisture content). Different clay materials and different extrusion equipment require a large difference in molding moisture. For example, the molding moisture content of hard plastic extruded coal gangue brick is only 13% ~ 14%, while the molding moisture content of soft plastic extruded clay brick is as high as 22% or more. The molding moisture content should be reduced as far as possible while ensuring the safety of equipment according to the raw materials and equipment capabilities of the factory.
The molding moisture content of brick billet shall be detected no less than twice per shift;
When extracting the sample brick, the extruder must be recorded at that time.'The load current of the extrusion motor, the extrusion speed of the mud strips (how many mud strips per minute).
This is because the molding moisture content of the brick is inversely proportional to the load current of the extrusion motor; and the molding moisture content is proportional to the extrusion speed of the mud strip, that is, the higher the molding moisture content, the faster the mud strip. In addition, the molding moisture content is inversely proportional to the strength of the brick, that is, the lower the molding moisture content, the harder the brick. Over time, just look at the load current of the motor, count the mud speed, and step on the strength of the brick to evaluate the molding moisture content at that time.
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