How To Control The Temperature During Pp Plastic Granulation? (Feeding Temperature, Screw Temperature, Die Temperature, Etc., What Is Their Significance?)

The granulation temperature of pp plastic is generally around 200 degrees, but does not include adding fiber and other fillers. The temperature of the feeding section is about 200 degrees, the middle of the screw is 210, 215, 205, and the mold temperature is between 180 and 200 degrees. If the feed temperature is too high, it is difficult to feed the material. The middle temperature of the screw has a melting effect. If the color is too high, it will cause problems. If the material is too low, it will not melt into the granulator to increase the load. The plastic mixing method is not good. The head temperature is just a constant temperature, and the material pulling force that is too high and too low is not very smooth. The heating temperature depends on the softening point or melting temperature of the carrier resin, which should generally be about 5°C higher than the melting temperature of the resin. If the heating temperature is too low, the resin cannot be completely melted, the limited carrier resin cannot completely cover the inorganic powder, holes appear on the surface of the rough particles of the masterbatch, and the resin and inorganic powder cannot form a uniform system. If the heating temperature is too high, the auxiliary agent is a volatile sample, and the screw shear force is reduced and should not be plasticized, which will also affect the quality of the masterbatch. First of all, plastic granulation skills 1. Learn to listen to the sound: the sound of the machine is very different as the feed speed and temperature change. This requires constant exploration in practice and trying to keep the machine in good condition for optimal operation. 2. Learn to look at the material: It is very important to look at the material from the nose, because this is the first key to finding the cause. For raw materials, if the temperature is too low, it must be heated; for coking, if the temperature is too high, it must be cooled, etc. 3. Observe the gloss and compactness of the particle surface: poor plasticization, loose particles, and dull surface.