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Blow molding machine, PET blow molding machine, PET blow molding machine common fault solutions, professional production of machinery

by:Yosion Machinery     2021-06-18
Fault 1: The transparency of PET bottle blowing machine is not good. Reasons: 1. Heating temperature is too high 2. Heating time is too long 3. Compressed air contains water 4. Injection embryo tube itself is opaque 5. The embryo tube design is not suitable 6. Inflation ratio Too small troubleshooting methods: 1. Cool down 2. Reduce heating time 3. Use a dryer to remove water 4. Improve embryo tube quality, select materials and increase raw material dryness 5. Improve embryo tube size design 6. Reduce embryo tube diameter failure 2. : PET bottle appears pearly luster and whitening Reasons: 1. The heating temperature is too low 2. The embryo tube wall thickness is uneven 3. The embryo tube thickness is too thick, and the heating penetration is insufficient. Elimination methods: 1. Increase the temperature or slow down the revolution speed 2. Improve Quality of embryo tube 3. Reduce the thickness of the embryo tube, or try to increase the outer cover of the heating device to increase the surface temperature of the embryo tube. Trouble 3: The position of the nozzle at the bottom of the PET bottle is offset. Reasons: 1. Start blowing too early 2. Stretching The rod is not down to the bottom 3. The stretching rod is offset from the center line of the bottle axis 4. The embryo tube wall thickness is uneven or the injection density is uneven 5. The heating is not uniform. Elimination method: 1. Delay the blowing time or increase the descending speed of the stretch rod 2. Adjust the position of the magnetic pole switch. 3. Adjust the position of the stretching rod. 4. Improve the quality of the embryo tube. 5. Improve the heating conditions. The position is not in the center of the embryo tube 2. The blow hole is asymmetrical, the pore diameter is different 3. The stretching ratio is too low or the inflation ratio is too small 4. The embryo tube does not rotate in the heating furnace 5. The embryo tube wall thickness is uneven or the injection density is not Elimination methods: 1. Adjust the position of the stretch rod 2. Adjust the position and aperture of the blowing hole 3. Increase the stretching ratio or inflation ratio 4. Check the rotation device 5. Improve the quality of the embryo tube. Failure 5. The upper part of the bottle is too thick. Reasons: 1. The upper part temperature is too low 2. The position of the mold vent hole is too far from the upper part 3. The stretch magnification is too low 4. The inflation ratio of the upper part of the bottle is too low 5. The stretching rod speed is too slow. , Adjust the position of the exhaust hole 3. Increase the stretching ratio 4. Change the shape of the bottle 5. Adjust the stretch rod speed. Fault 6: The bottom of the bottle is too thin. Reasons: 1. The blowing time is too early. 2. The bottom temperature is too high. 3. The bottom of the embryo tube is too thin. Solution: 1. Delay the blowing time. 2. Lower the bottom temperature. 3. Increasing the bottom thickness of the embryo tube. Fault 7: obvious reasons for the bottle clamping line: 1. The clamping pressure is not enough. 2. The sealing time is too early. 3. The mold problem 4. The size of the embryo tube tooth mouth does not match the mold. Solution: 1. Increase Clamping pressure, adjust the angle of clamping struts (<5 degrees) 2. Move back the mold clamping stroke switch position 3. Repair the mold or check the mold assembly position, such as whether the guide post is loose or whether the mold is not tightly pressed 4. Repair mold tooth mouth fitting fault 8: The bottom of the bottle or the bottleneck is rolled up, and the cause of the material accumulation: 1. The delayed blowing time is too long 2. One roll is good 3. The temperature at the accumulation place is too low 4. The air pressure for action is unstable , The method of affecting the descending speed of the stretch rod: 1. Shorten the delayed blowing time or reduce the descending speed of the stretch rod. 2. Reduce the air volume on one side of the reel. 3. Increase the heating temperature of the embryo tube. 4. Add air storage. The tank is in the action air source, or the air supply pipeline is shortened. 9: The bottom of the bottle is stretched and perforated. Reasons: 1. The temperature is not enough and not penetrated. 2. The delay stretch time is too long. 3. The stretch ratio is too large. 4. The bottom of the embryo tube. Too thin 5. Too sharp stretched head troubleshooting method: 1. Heat 2. Shorten the delay stretch time 3. Reduce the stretch ratio 4. Improve the bottom design of the embryo tube 5. Round the stretched head failure 10: Bottle Reasons for bottom blasting: 1. Delayed blowing time is too short 2. Delayed mold opening time is too short 3. Temperature is too high 4. Exhaust valve does not work Remedy: 1. Extend the delayed blowing time or increase the stretch rod Decrease speed 2. Lengthen the delay opening time 3. Cool down 4. Clean the exhaust valve with gasoline. Fault 11: The bottom of the bottle is not full. Reasons: 1. The temperature of the bottom of the bottle is too high. 2. The exhaust hole at the bottom of the mold is insufficient or uneven 3. The stretch rod has not reached the bottom 4. The design of the stretch rod head does not conform to the shape of the bottom of the embryo tube 5. The blowing pressure is insufficient 6. The blowing valve flow is insufficient 7. The bottle bottom curve design is not good. Lower the bottom temperature or use a damp cloth to lower the temperature at the bottom of the embryo tube 2. Increase the number of exhaust holes and make it evenly distributed 3. Adjust the stretch rod to the bottom of the bottle 4. Replace the stretch rod head 5. Increase the blowing pressure 6. Clean and blow with gasoline Air valve 7. Increasing the curve and streamline design of the bottom of the bottle. Failure 12: Reasons: 1. If the tooth part of the embryo tube is in a specific position, it is the reason for the uneven thickness of the embryo tube. 2. If the mold clamping line is in a specific position relative to the mold The orientation is due to the problem of mold exhaust. 3. The embryo tube is heated unevenly. 4. The bottom of the mold is poorly designed. Elimination methods: 1. Improve the thickness of the embryo tube. 2. Improve the vent at the bottom of the mold. 3. Improve the heating conditions. 4. Improve the bottom design.
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