Nowadays, the application of graphite plate more and more, I believe that many people have also found some cracks in the graphite plate, worried that these cracks will bring some unknown damage. So why does the graphite plate crack? Today xiaobian to tell you about the cause of the graphite plate crack.

In the production of graphite plate, transverse or longitudinal cracks of more than 10 mm in length are not allowed, and cracks of more than 1 mm in width and more than 50 mm in length are not allowed for products of medium and above specifications. Most of the smaller cracks can be healed in the roasting process, but the larger cracks become the discharge channel of volatiles in the roasting process and make the cracks grow larger and larger.

1.the binder amount of paste is too large or the charging temperature is high, after the paste is pressed out, the elastic backswell is large, the stress disappears slowly, may lead to cracks. When the charging temperature is higher, the flue gas is not clean, and the flue gas is sandwiched in the paste, which also tends to crack. 2.paste binder dosage is too small or charging temperature is too low, paste plasticity is poor, paste adhesion between small, so it is not easy to compact, also easy to crack. 3.squeeze the mouthpiece and pressure chamber temperature is too high, close to squeeze the mouthpiece and pressure indoor wall paste by excessive heat, so the temperature and pressure compartment part of the paste is large, compression after the two kind of material is not the same as the extrusion speed, extruding part products for surface and back after expansion coefficient, which is easy to crack. Conversely, the heating temperature of the extrusion nozzle and the press chamber is lower, while the higher temperature of the paste has the same effect.