1.Surface granulation:
Main reasons:
(1) There are impurities in the barrel and die head;
(2)The temperature is not correct;
(3) The heating residence time of raw materials in the barrel is too long;
The dispersion of color master or toner is not handled well;
The filter screen has been perforated.
Treatment method: adjust the temperature of the molding machine to 10-20℃ lower than the normal temperature, start the molding machine, use the primary color plastic resin to clean the work again at a slow speed, if necessary, take the die head apart to clean, and adjust the temperature, replace the filter screen in time.
Use a well-dispersed masterbatch or toner to re-debug.
2. Uneven diffusion:
Main reasons:
(1) the mixture is not uniform;
(2)The temperature is not appropriate;
(3) Color masterbatch and raw materials are incompatible;
(4) the plastic machine itself plasticized fruit;
The proportion of color master placement is too small.
Treatment method: fully stir, adjust the temperature properly, replace the color master or raw materials, replace the production of other machines, adjust the proportion of color master.
3. Constant cutting
Main reasons:
(1) incorrect temperature;
(2)Poor compatibility of raw materials;
(3)Poor color masterbatch dispersion;
(4)The proportion of color master is too high.
Treatment method: adjust the temperature more accurately, change the raw materials, change the color master with good dispersion, reduce the proportion of color master.
4. Color changes:
Main reasons:
(1) the use of raw materials background color is not consistent;
(2)The molding machine is not clean;
(3) the color master or toner temperature resistance is low, the temperature is too high when achromatic;
(4)The discharging door is not clean;
(5) Change of processing technology;
Master or toner itself has chromatic aberration;
Mixing machine is not clean or mixing time is not controlled.
Treatment: Clean the molding machine, blanking door and mixing machine thoroughly;
Use a temperature-resistant master or toner with the same color;
Use a stable process.
PUDA PVC particles packing machine:
PUDA will use gravity type open bag machi for pvc particles due to its good mobility. This type of machine use the following working princible:
Materials flow freely by gravity and product will enter into weighing system uniformly through feeding unit from silo. The feeding unit valve will open after start up packing machine, then Materials will be filled into bag or weighing hopper. When weight reaches the preset value, the feeding unit valve will close. Operator takes filled bag away, or put it on belt conveyor to sewing machine. The packing process is finished.
