In the production process, the extruder will sometimes appear plastic, this is what reason?.
One, coke burning
1, coke burning phenomenon
(1) the temperature is very high, or the control temperature of the instrument failure, resulting in plastic super high temperature and coke burning.
(2) the head of the smoke big plastic mouth, have a strong odor, and crackling.
(3) the surface of the plastic granular coke burning.
(4) there are continuous pores at the joint of the plastic joint.
2, the cause of coke burning
(1) the temperature control of super high plastic coke burning.
(2) screw long-term use without cleaning, coke burning material accumulation, with plastic extrusion.
(3) the heating time is too long, the long-term accumulation of plastic heating, make plastic aging deterioration and scorch.
(4) the parking time is too long, without cleaning the nose and screw, resulting in plastic decomposition of coke burning.
(5) for a number of times to change or change color, resulting in plastic decomposition.
(6) the head cover is not pressed, plastic inside aging decomposition.
(7) the control temperature of the instrument failure, resulting in super high temperature after the coke burning.
3, the elimination of coke burning method
(1) the regular inspection of the heating system is normal.
(2) regular cleaning of the screw or head, to thoroughly clean.
(3) according to the requirements of the process of heating, heating time should not be too long, if the heating system has a problem to find the relevant personnel in a timely manner. (4) die change or change the color to be timely, clean, prevent or rubber scorch noise.
(5) adjust the mold to mold the gland, prevent the glue inlet.
(6) found that the coke burning should immediately clean up the nose and screw.
Two, poor plastic
1, the phenomenon of poor plastic
(1) the surface of the plastic layer has the phenomenon of toad skin type.
(2) the temperature control is low, the meter pointer reflects the temperature is low, the actual measurement temperature is low.
(3) the surface of the plastic hair black, and there is a small crack or no good plastic particles.
(4) the plastic is not good, there is a clear mark.
2, the cause of poor plastic
(1) the temperature control is too low or the control is not suitable.
(2) resin particles are difficult to be plastic.
(3) improper operation, the screw and the traction speed is too fast, the plastic has not completely achieved the plastic.
(4) when the mixing of plastic is not uniform or the quality of the plastic itself exists.