Fault 1: poor transparency of PET bottles
Reasons: 1. Overheating temperature 2. Overheating time 3. Compressed air contains water 4. Injection tube itself is opaque 5. Tube design is not appropriate 6. Blowing ratio is too small.
Removal methods: 1, cooling 2, shortening heating time 3, dehydrating 4 with dryer, improving the quality of embryo tube, selecting materials and increasing dryness of raw materials 5, improving the design of embryo tube size 6, reducing the diameter of embryo tube
Fault 2: Pearl Gloss Whitening in PET Bottle
Reasons: 1. The heating temperature is too low 2. The wall thickness of the embryo tube is not uniform 3. The thickness of the embryo tube is too thick and the heating penetration is insufficient.
Exclusion: 1. Preheat or slow down the common speed 2, improve the quality of embryonic tube 3, reduce the thickness of embryonic tube, or try to raise the cover of heating device to increase the surface temperature to discharge one layer of embryonic tube.
Fault 3: Position deviation of bottom nozzle of PET bottle
Reasons: 1. Early initial blowing time 2. Tensile rod will not fall to the end 3. Tensile rod deviates from the center line of the bottle axis 4. Blastocyst wall thickness or injection density are not uniform 5. Heating is not uniform.
Elimination method: 1. Delay blowing time or increase the descending speed of stretching rod 2, adjust the position of magnetic switch 3, adjust the position of stretching rod 4, improve the quality of embryonic tube 5, improve heating conditions, or check whether the embryonic tube rotates.
Fault 4: Non-uniform wall thickness of PET bottle
Reasons: 1. The stretching rod is not located in the center of the embryonic tube. Stomata are asymmetrical. The diameter of stomata is different. 3. The drawing ratio is too low or the blowing ratio is too small. 4. The tube does not rotate in the heating furnace. 5. Uneven wall thickness or injection density of embryonic tube.
Disassembly method: 1. Adjust the position and diameter of stretching rod 2, adjust the position and diameter of stomata 3, increase the stretching or blowing ratio 4, check the rotating device 5, and improve the quality of embryo tube.
Fault 5: The top of the bottle is too thick
Reasons: 1. The upper temperature is too low 2. The position of the exhaust hole of the die is too far from the upper 3. The drawing ratio is too low 4. The blowing ratio of the bottle is too low 5. The speed of the tie rod is too slow.
Elimination method: 1. Preheat the upper 2, adjust the position of exhaust hole 3, increase the draw ratio 4. Change the shape of bottle 5. Adjust the speed of pull rod
Fault 6: Bottle bottom is too thin
Reasons: 1. Early start blowing 2. Bottom temperature too high 3. Bottom too thin
Disassembly method: 1. Delayed start-up blowing time 2. Reducing bottom temperature 3. Increasing bottom pipe thickness
Fault 7: The bottle clamping line is obvious
Reasons: 1. The clamping pressure is less than 2, the sealing time is too early 3, the die problem 4, the nozzle size does not match the die.
Elimination method: 1. Increase clamping pressure, adjust the angle of clamping support rod (< 5 degrees) 2, move clamping die travel switch position 3 backwards, repair the die or check the assembly position of the die, such as whether the guide pillar is loose, or whether the die is tightened 4, repair the appropriate position of the die teeth.
Fault 8: Bottom or neck of bottle rolled up and stacked
Reasons: 1. Delayed blowing time is too long 2. Rolling, good 3. Accumulator temperature is too low 4. Action pressure is unstable, affecting the downward speed of the stretching rod.
Removal methods: 1. Shorten delayed blowing time or decrease the descending speed of stretching rod 2, reduce the gas volume on the side of cylinder 3, increase the heating temperature of tube 4, add gas storage tank to mobile gas source, or shorten the gas supply pipeline.
Fault 9: Bottom Drawing Perforation
Reasons: 1. Insufficient temperature, impermeability 2, too long delayed stretching time 3, too large stretching ratio 4, too thin at the bottom of the tube 5, too sharp at the end of the stretching rod
Elimination methods: 1. Warming up 2, shortening delayed stretching time 3, reducing stretching ratio 4, improving bottom design of tube 5, rounding stretching rod head
Fault 10: Bottle Bottom Blasting
Reasons: 1. Delay blowing time is too short 2. Delay opening time is too short 3. Temperature is too high 4. Exhaust valve does not work.
Elimination methods: 1. Increase delay blowing time or draw rod descending speed 2. Increase delay opening time 3. Decrease temperature 4. Clean exhaust valve with gasoline
Fault 11: Bottle bottom is not full
Reasons: 1. Bottom temperature is too high 2. Exhaust hole at bottom of die bottle is insufficient or uneven 3. Drawing rod is not at bottom 4. Drawing rod head design does not conform to bottom shape of tube 5. Blowing pressure is insufficient 6. Blowing valve flow is insufficient 7. Bottom curve design is not good.
Removal methods: 1. Reducing the bottom temperature of heating zone or using wet cloth to reduce the bottom temperature of blastocyst 2, increasing the number of exhaust holes and distributing them evenly 3, adjusting the stretching rod to the bottom of the bottle 4, replacing the stretching rod head 5, increasing the blowing pressure 6, cleaning the blowing valve 7 with gasoline, and increasing the streamline design of the bottom curve of the bottle
Reasons: 1. The uneven thickness of the tube is caused by the tooth position relative to the tube. 2. The exhaust of the mould is caused by the clamping line relative to the mould position. 3. The uneven heating of the tube. 4. The design of the bottom of the mould is not good.
Elimination methods: 1. Improving the design of tube thickness 2. Improving the exhaust holes at the bottom of the die 3. Improving the heating conditions 4. Improving the bottom design.