PET bottle injection stretch blow molding defects and exclusion

After the preform is heated and bent, 1. The preform is eccentric 2. The temperature adjustment hole or the temperature adjustment base is eccentric 3. The density of the preform is different. Fix the mold 2. Correct temperature adjustment positioning part 3. Reduce the temperature, especially the curved part of the thermostat temperature pp> blowing bottle local white-bottle embryo thermoregulation increase pp> preform temperature and internal and external uniformity of the preform after tempering white in the white section of the preform thermostat temperature is too high Guarantee pp>Bottle preform at 80 degrees to 110 degrees pp>Blowing bottle pp>Bottle blown without inflation 1.Gas pressure less than 2.Bottle embryo tempering insufficiently 3.Bottle embryo injection defect 1.Increasing pressure gas volume 2.Increase embryo temperature 2 Use 100 degrees water to check if pp > preform is softened and evenly pull through the embryo base. 1. Embryo temperature is too high 2. Embryo temperature is too low 3. Degradation of plastic seriously 1. Adjust embryo temperature 2. Racha to replace preforms and raw materials to enhance drying preform eccentricity 1. Blow too soon 2. Wind pressure is too high 3. Stretch rod and bottom misalignment. Bottleneck eccentricity serious 5. Stretch rod speed is too slow Stretch rod is greater than 1.5mm from the bottom mold
7. The temperature of the preform is too high. Slow down delay blow time 2. Reduce wind pressure 3. Correct the installation status 4. Check the correct preform condition 5. Adjust the tension cylinder pressure 6. Adjust the end of the stretch rod to the bottom mold 1-1.5mm
7. Reduce the temperature at the lower end of the temperature bottle is not full in the vertical direction
1. Dissatisfaction with some thermostats is too high. Dissatisfaction with part of the bottle has a cold block 3. Wind pressure less than 4. Bad blowing mold exhaust 5. Blow mold temperature too high The preform wall is too thin. The longitudinal stretch ratio of the bottle is less than 1. Adjust pp> preform temperature 2. Do not touch the heated body, check if the cold block touched 3. Increase the air pressure of the stored gas. 4. Increase the exhaust 5. Add cooling water to the blow mold. Correct the mold 7. Increase the stretch ratio (vertical) pp> Bottle wall circumference is not uniform in wall thickness 1. Bottle preform eccentric 2. Uneven temperature adjustment 3. Bad exhaust Improved preform mold 2. Improve temperature control equipment 3. Reduce the bad part pp> preform temperature 4. Increase the exhaust bottle at the bottom of the "crater"-like raised the bottom of the bottle is too cold or other parts of the preform temperature is too high earlier blowing time, adjust the temperature adjustment after blowing the bottle partially white. Local thermoregulation is less than 2. The local stretch ratio is too large. There is moisture in the compressed air. Increase preform temperature 2. Check the preform design 3. Strengthen the poor vertical bearing capacity of the filter oil filter jar. Uneven wall thickness 2. The temperature of the preform is too high 3. Bottle shape is bad 1. Improve the wall thickness of the bottle As far as possible low temperature high pressure molding 3. Improve the bottle design bottle easily fall below 1. The bottom wall thickness is not properly stretched. Degradation of plastics Improve the bottom draw ratio. Strengthen raw materials before injection Reducing the production temperature There are pits and white fog in the bottle. Blowing in dirty air Humidity in the air Set air filter device 2. Reduce the humidity of the blown air. The bottle is too soft. Bad design 2. Processing temperature is too high Improve design 2. As far as possible at the low temperature injection and blow molding bottle blow molding after the foul odor 1. Warming too high 2. Bad compressed air 3. Use inferior materials 1. Lower blowing temperature Finishing air compressor and filter 3. After using the regular bottle of water for a period of time, the water will taste bad. The acetaldehyde content of the bottle is too high. Inappropriate raw materials Low temperature injection and blowing Check the content of acetaldehyde before raw materials processing, eliminate inferior materials