西班牙语Causes and solutions of general quality problems in heat-resistant PET bottles in the production process
Bottleneck skew
Oil circuit is blocked Clear the oil circuit of the mold body
Stretching rod exhaust hole is blocked Clear the stretching rod blowing hole
Damaged nozzle seal Replace nozzle seal
center point deviation
Pre-blow pressure too high Decrease pre-blow pressure
The pre-blow flow is too large Reduce the pre-blow flow
Pre-blowing position too early Delay pre-blowing position
The stretch rod is bent Replace the stretch rod
The gap between the stretch rod and the bottom mold is too large. Adjust the stretch rod gap.
The preform temperature is too high Reduce the preform set temperature
Deformation of the bottom of the bottle
Bottom mold oil temperature is too high Reduce the oil temperature of the hot oil
The blowing valve of the bottom mold is damaged. Replace the blowing valve of the bottom mold.
The temperature at the bottom of the preform is too high Reduce the temperature at the bottom of the preform
Bottom of the bottle wrinkled
The pre-blowing pressure is too low Increase the pre-blowing pressure
The pre-blowing air flow is too small Increase the pre-blowing air flow
Pre-blow too late Pre-blow early
stiff neck
Insufficient neck heating Increase neck heating
Pre-blow pressure is too high Decrease pre-blow pressure
The pre-blow flow is too large Reduce the pre-blow flow
Pre-blow too early Delay pre-blow
The position of the heating furnace is too high Adjust the position of the heating furnace
The speed of the stretching rod is slow Check the stretching cylinder
Poor parting line forming
Die compensation seal is damaged Replace compensation seal
Improper adjustment of mold gap Adjust mold gap
Deformation of the front wall
Cooling blow time is too short Extend cooling blowing time
Mold body temperature is too high Reduce mold body temperature
No cooling air blowing out of the stretch rod Overhaul the stretch rod blowing system
Deformation of sidewall after irrigation
Mold body temperature is too low Increase the mold body hot oil temperature
The preform setting temperature is too low Increase the preform setting temperature
Cooling blow time is too long Decrease cooling blowing time
Uneven distribution of plastic Adjust the blowing process to make the material evenly distributed
The hot oil flow is too small. Clear the oil circuit and clean the oil filter.
Great shrinkage
Mold temperature is low Increase mold temperature
Low preform temperature Increase preform set temperature
Cooling blow time is too long Shorten cooling blow time
Oil circuit blocked Clear the oil circuit
Diameter is too large or too small
Improper setting of cooling air blowing time Adjust cooling air blowing time
Uneven distribution of plastic Adjust the process to make the material evenly distributed
Oil circuit is blocked Clear the oil circuit of the mold body
Stretching rod exhaust hole is blocked Clear the stretching rod blowing hole
Damaged nozzle seal Replace nozzle seal
center point deviation
Pre-blow pressure too high Decrease pre-blow pressure
The pre-blow flow is too large Reduce the pre-blow flow
Pre-blowing position too early Delay pre-blowing position
The stretch rod is bent Replace the stretch rod
The gap between the stretch rod and the bottom mold is too large. Adjust the stretch rod gap.
The preform temperature is too high Reduce the preform set temperature
Deformation of the bottom of the bottle
Bottom mold oil temperature is too high Reduce the oil temperature of the hot oil
The blowing valve of the bottom mold is damaged. Replace the blowing valve of the bottom mold.
The temperature at the bottom of the preform is too high Reduce the temperature at the bottom of the preform
Bottom of the bottle wrinkled
The pre-blowing pressure is too low Increase the pre-blowing pressure
The pre-blowing air flow is too small Increase the pre-blowing air flow
Pre-blow too late Pre-blow early
stiff neck
Insufficient neck heating Increase neck heating
Pre-blow pressure is too high Decrease pre-blow pressure
The pre-blow flow is too large Reduce the pre-blow flow
Pre-blow too early Delay pre-blow
The position of the heating furnace is too high Adjust the position of the heating furnace
The speed of the stretching rod is slow Check the stretching cylinder
Poor parting line forming
Die compensation seal is damaged Replace compensation seal
Improper adjustment of mold gap Adjust mold gap
Deformation of the front wall
Cooling blow time is too short Extend cooling blowing time
Mold body temperature is too high Reduce mold body temperature
No cooling air blowing out of the stretch rod Overhaul the stretch rod blowing system
Deformation of sidewall after irrigation
Mold body temperature is too low Increase the mold body hot oil temperature
The preform setting temperature is too low Increase the preform setting temperature
Cooling blow time is too long Decrease cooling blowing time
Uneven distribution of plastic Adjust the blowing process to make the material evenly distributed
The hot oil flow is too small. Clear the oil circuit and clean the oil filter.
Great shrinkage
Mold temperature is low Increase mold temperature
Low preform temperature Increase preform set temperature
Cooling blow time is too long Shorten cooling blow time
Oil circuit blocked Clear the oil circuit
Diameter is too large or too small
Improper setting of cooling air blowing time Adjust cooling air blowing time
Uneven distribution of plastic Adjust the process to make the material evenly distributed
