The bottom of the 1. is not full.

Reasons: 1. The bottle blowing pressure is not enough 2. The bottle blank temperature is slightly lower when blowing bottles

Solution: 1. Check whether the high-pressure filter on the side of the mold is unobstructed, so as not to affect the high-pressure gas supply

2. Check the working condition of the valve to ensure accurate positioning of blowing 1 and blowing 2

3. Check the airflow control elements of blowing 1 and blowing 2 to ensure the correct setting value and the inside is unblocked

4. Ensure that all ventilation holes on the mold are not blocked

 

2. neck bending

Reason: 1. Caused by mechanical operation, excessive thickness of neck material causes deformation after mold closing

Solution: 1. Optimize the clamping structure

2. The convex ring is too tightly clamped in the recess of the top plate of the mold, and the size of the preform must be fixed when it is still hot.

3. bottle mouth expansion, blow bottle running gas

Reason: 1. The surrounding temperature is too high 2. The cooling effect of oven airflow

Solution: 1. Adjust the position of the cooling class so that it can protect the thread of the preform more strongly.

2. Optimize the cooling plate design structure

4. bottom line blue

Reason: 1. Blowing too high 2. Stretch rod pressure is lacking

Solution: 1. Set the blowing time and speed 2. Check whether the stretching rod is blocked

5. bottom damage

Reason: 1. The temperature at the bottom of the preform is off the bottom 2. The position of the stretching rod is too high

Solution: 1. Adjust the heating temperature at the bottom of the preform 2. Adjust the position of the stretching rod

6. bottle mouth thread damaged

Cause: the thread zone is subjected to undue stretching, and the surrounding high temperature causes the temperature of the thread zone of the preform to be too high.

Solution: 1. Ensure that the adjustment of the conveying arm is accurate and correct

2. Precise positioning of the preform, while reducing the heating temperature of the thread zone and optimizing the structural design

7. level drops too much

Reason: after the pet container is filled, the solution drops, the bottle blowing temperature is too high, and pearlescent phenomenon is formed

Solution: adjust the temperature of the heating furnace to avoid heating or cold starting.

8. burst

Reason: 1. The bottom of the bottle is too thin due to too high temperature 2. The blowing time is too short

Solution: 1. Adjust the bottle bottom temperature 2. Lengthen the delayed blowing time

Flat 9. clamping line

Reason: In the process of blowing the bottle, the gas cannot be discharged from the vent hole with time delay, and the thin layer of material forming the bottle wall blocks the vent hole.

Solution: 1. Correctly adjust the mold gap 2. High-pressure air valve controls airflow 3. Improve the design structure

10. bottom creases

Reason: The external wrinkle blow bottle pressure 1 is not enough, and the stretching rod is too much to push the material down;

Internal wrinkles are generally overheated at the head end of the preform or the initial tensile pressure is delayed.

Solution: 1. Ensure that the blow bottle 1 is continuously and consistently on the mold

2. Do not overheat the end of the preform

3. Make sure that the delay is not too long from the beginning of stretching to the entry of blowing 1.