Abnormal removal of bottle blowing

32 common failures and extraction methods of linear bottle blows


Poor 1:PET bottle transparency

The reasons are: 1, heating temperature is too high 2, heating time is too long, 3, compressed air contains 4 water, injection tube itself is opaque 5, germ tube design is not comfortable 6, and inflation ratio is too small.

The following methods were excluded: 1, cooling 2, shortening heating time 3, using desiccator to remove water 4, improving germ tube quality, selecting materials and improving raw material dryness 5, improving embryo tube size 6, and narrowing the diameter of germ tube.


Fault 2:PET bottles appear pearl gloss white

Causes: 1, the heating temperature is 2, the wall thickness of the tube is not equal to 3, the tube thickness is too thick and the temperature is insufficient.

The following methods were excluded: 1, warming or slowing down the revolution speed 2, improving the quality of germ tube 3, decreasing the thickness of embryo tube, or trying to increase the outer cover of heating device, so as to increase the surface temperature of embryo tube.


Position offset of the bottom of the failure 3:PET bottle

The reasons are: 1, start blowing time is too early, 2, stretch bar does not go to the bottom 3, draw rod and bottle shaft center line shift 4, embryo tube wall thickness is uneven or injection density is uneven 5, uneven heating.

The following methods are excluded: 1, delayed blowing time or increasing the drop speed of drawing rod 2, adjusting the position of magnetic pole switch 3, adjusting the position of drawing rod 4, improving the quality of germ tube 5, improving heating condition, or checking whether the rotation of germ tube has any problem.


Malfunction 4:PET bottle wall thickness uneven

The reasons are as follows: 1, the position of the tensile rod is not in the center of embryo tube 2, the blow hole is asymmetric, the pore diameter is not 3, the elongation ratio is too low or the blow up ratio is too small, 4, the embryo tube does not rotate 5 in the heating furnace, the thickness of the embryo tube wall is uneven, or the injection density is uneven.

The following methods are excluded: 1, adjust the position of the drawing rod 2, adjust the position and diameter of the blow hole 3, increase the drawing ratio or blow up ratio 4, check the rotation device 5, and improve the quality of the germ tube.


Fault 5: the upper part of the bottle is too thick

The reasons are as follows: 1, the upper temperature is too low 2, the position of the die exhaust hole is too far 3, the tensile ratio is too low, 4, the blow up ratio of the upper part is 5, and the speed of the drawing rod is too slow.

Elimination methods: 1, the upper temperature 2, adjust the position of the exhaust hole 3, increase the tensile ratio 4. to change the shape of the bottle 5. to adjust the speed of the rod


Fault 6: the bottom of the bottle is too thin

The reasons are as follows: 1. The beginning of the blowing time is 2, the bottom temperature is too high, and the bottom of the tube is too thin.

Elimination methods: 1. Delayed start blowing time 2, lower bottom temperature 3, increase the thickness of embryo tube bottom


Fault 7: clear bottle line

Reasons: 1, the clamping pressure is not enough, 2 time early 3, sealing mold problems 4, germ tube mouth size and mold with inconsistent

Method: 1, increase the pressure of the mold, adjust the clamping rod angle (<5 degrees) 2, after the shift clamping stroke switch position 3, repair the mold or check the mold assembly position, such as the guide column or loose, or whether the mold clamping, mold maintenance with a mouth 4


Fault 8: bottle bottom or bottle neck roll up, stock

The reasons are as follows: 1. The delay blowing time is 2, a volume is too long, a good 3, the temperature of the product is too low 4, the operation pressure is unstable, which affects the descending speed of the tension bar.

The following methods are excluded: 1, shorten the time of blowing time or decrease the speed of the drawing rod 2, reduce the volume of gas on the side of the bottle, 3, increase the heating temperature of the germ tube, 4, add the gas tank to the action gas source, or shorten the gas supply pipeline.


Fault 9: bottling and perforation

Reasons: 1, the temperature is not enough, not penetration 2, delay time is too long, 3 Tensile tensile is 4, 5, embryo at the bottom of the tube is too thin to stretch rod head too sharp elimination: 1, 2, shorten the delay time of heating, 3 tensile stretch ratio reduced 4 and improve the embryo at the bottom of the tube 5, repair design round tension rod head


Fault 10: Blasting at the bottom of a bottle

The reasons are as follows: 1. The delayed blowing time is too short 2, the delay time is too short, the temperature is too high, the temperature is too high 4, the exhaust valve does not work.

The elimination method: 1. Lengthening the delayed blowing time or increasing the drop speed of the stretch rod by 2, the lengthening delay time of the die opening 3, the cooling 4, and the gas cleaning valve with gasoline.


Fault 11: the bottom of the bottle is not full

Reasons: 1, bottom temperature is too high, 2, the bottom of the bottle is not enough or uneven, 3, the rod is not bottom 4, the design of the drawing rod does not conform to the shape of the bottom of the tube, 5, the blow pressure is less than 6, the flow rate of the blow valve is less than 7, and the bottom curve design is not good.

Method: 1, reduce the heating area at the bottom temperature or lower temperature at the bottom 2, germ tube to increase the exhaust hole number and the uniform distribution of 3, adjust the tension bar to the bottom of the bottle 4, replacing the tension bar head 5, increase the air blowing pressure 6, cleaning with gasoline blowing valve 7, increase the alignment design of bottle bottom flow curve with a damp cloth


Fault 12:1, if relative to the germ tube and tooth part in a specific position, is the reason of uneven thickness of embryo tube. 2, if the relative die clamping line is in a specific position, it will exhaust the mold 3, the embryo tube heating is uneven, 4, and the bottom of the mould is not well designed.

The elimination methods: 1. Improve the design of the tube thickness 2, improve the bottom exhaust hole of the die 3, improve the heating condition 4, improve the bottom design.

Fault 13: no power supply indication for bottle blowing machine

The reasons are: 1, the socket is not electricity 2, the insurance pipe is broken 3, the thread head shedding 4, the safety emergency switch is not opened 5, the power switch is open at ON 6, the indicator lamp is damaged 7, and the small circuit breaker in the heating furnace control socket is closed.

Methods of elimination: 1, check whether there is electricity in the socket, whether the leakage switch is tripped, 2, check whether the line is short circuited, then replace the safety pipe 3, connect the connector 4, open the emergency safety switch 5, switch the power switch at ON 6, change the indicator 7, and close the circuit breaker.


Fault 14: no seal and stretch action

Reasons: 1, mold stroke is not in place 2, clamping stroke switch 3, off 4, bad wire delay time relay, lifting 5 tensile damage and tensile damage of the electromagnetic valve solenoid valve 6, cylinder inlet, exhaust throttle valve plug or closed solenoid valve 7, the corresponding delay time setting, the tensile failure 8