Failure Analysis of Rotary Blow Molding Machine

Reasons: 1. The heating temperature is too high. 2. The heating time is too long. 3. The compressed air contains water. 4. The injection mould tube itself is opaque. 5.
The embryo tube design is not suitable 6. The inflation ratio is too small

Elimination methods: 1. Cool down 2. Shorten the heating time 3. Use a dryer to remove water 4. Improve the quality of the embryo tube, select materials and improve the original
Material dryness 5. Improve embryo tube size design 6. Reduce embryo tube diameter

Reasons: 1. The heating temperature is too low 2. The wall thickness of the embryo tube is uneven 3. The thickness of the embryo tube is too thick, and the heating penetration is insufficient

Remedy: 1. Increase the temperature or slow down the revolution speed 2. Improve the quality of the embryo tube 3. Reduce the thickness of the embryo tube, or try to increase the heating device
The outer cover is placed to increase the surface temperature of the embryo tube

Reasons: 1. The blowing time is too early 2. The stretching rod is not down to the end 3. The stretching rod is offset from the center line of the bottle axis 4. The wall thickness of the embryo tube
Uneven or uneven injection density 5. Uneven heating

Remedy: 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 stretch rod
Position 4. Improve embryo tube quality 5. Improve heating conditions, or check whether there is any problem with embryo tube rotation

Reasons: 1. The position of the stretch rod is not in the center of the embryo tube. 2. The blowing holes are asymmetrical and the pore diameters are different. 3. The stretching magnification is too low or the inflation ratio is too low.
The case is too small. 4. The embryo tube does not rotate in the heating furnace. 5. The embryo tube wall thickness or injection density is uneven.

Elimination methods: 1. Adjust the position of the stretch rod 2. Adjust the position and diameter of the blowing hole 3. Increase the stretching ratio or inflation ratio 4. Check
Check the rotation device 5. Improve the quality of embryo tube

Reasons: 1. The temperature of the upper part is too low 2. The position of the mold vent hole is too far from the upper part 3. The stretching ratio is too low 4. The inflation ratio of the upper part of the bottle
Too low 5. The stretching rod speed is too slow

Remedy: 1. Heat the upper part 2. 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

Reasons: 1. Start blowing too early 2. The bottom temperature is too high 3. The bottom of the embryo tube is too thin

Remedy: 1. Delay the start of blowing time 2. Reduce the bottom temperature 3. Increase the bottom thickness of the embryo tube

Reasons: 1. The clamping pressure is not enough 2. The sealing time is too early 3. The mold problem 4. The size of the germ tube tooth mouth does not match the mold
Remedy: 1. Increase the clamping pressure and adjust the angle of the clamping support rod (<5 degrees) 2. Move the mold clamping stroke switch position back 3. Repair
Handle the mold or check the assembly position of the mold, such as whether the guide pin is loose, or whether the mold is not pressed tightly 4. Repair the mold tooth mouth fit position