2023.03.25
The two phenomena mentioned above will also cause temperature out of control. Therefore, during the start-up process of the equipment, the cooling oil circuit or water circuit should be kept unblocked, and the relevant accessories should be checked frequently to see if they are normal.
The foam molding machine can judge the equipment status of the extruded board external wall insulation by observing the oil temperature, water temperature indication and pressure indication. The polystyrene foam board equipment factory placed the screw in the wrong position, and collisions and drops occurred during the installation process, which caused the screw to deform to a certain extent and had burrs, resulting in poor quality of polystyrene extruded foam board.
These often cause the instrument to work in the state of no output, and it is in a sub-runaway state (that is, the instrument has no output indication, but the temperature indication value still rises slowly and remains at a high temperature point). If this phenomenon occurs, in addition to eliminating the fan, In addition to factors such as oil cooling, cooling water, thermal instruments, and thermocouples, it is necessary to confirm the deformation of the screw and grind the screw if necessary.
Due to the rotation of the screw, the plastic particles are deformed and extruded in the barrel, and the heat and temperature rise sometimes exceed what is required for the plasticization of the plastic particles, even after the power is turned off, it still does not stop, and then exceeds the required range. At this time, if the balance of the cooling system of the machine is out of balance, such as insufficient power of the cooling fan, damage, etc., the temperature of the barrel will be out of control, causing the unbalanced plasticization of the particle material.
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