Location：Home > Video&News > Industry News >

#News information

Whole-hearted service, always adhere to customer first

Video/ Company News/ Industry News/

Failure analysis of Rotary blowing machine (1)

viewed:, updated：2024-07-18 16:46:20, Author：
Work requires continuous learning, learning to constantly accumulate information and constantly strengthen memory.
Fault # 1: PET bottles are not transparent
Reasons: 1, the heating temperature is too high 2, the heating time is too long 3, the compressed air contains water 4, the injection embryo tube itself is not transparent 5, the embryo tube design is not suitable 6, the blowing proportion is too small
Elimination methods :1, cooling 2, shorten the heating time 3, use the dryer to remove water 4, improve the quality of the embryo tube, select materials and improve the dryness of raw materials 5, improve the size of the embryo tube design 6, reduce the diameter of the embryo tube
Fault 2: PET bottle appears pearl-gloss white
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
Elimination methods :1, heat up 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 raise the cover of the heating device, in order to increase the temperature distribution of the surface of the embryo tube
Fault 3: The position of the water outlet at the bottom of PET bottle is offset
Reasons: 1, the start of blowing time is too early 2, the drawing rod is not down to the end 3, the drawing rod and the center line of the bottle shaft offset 4, the embryo tube wall thickness is not uniform or the injection density is not uniform 5, the heating is not uniform
Elimination methods :1, delay the blowing time or increase the drawbar decline speed 2, adjust the position of the magnetic pole switch 3, adjust the position of the drawbar 4, improve the quality of the embryo tube 5, improve the heating conditions, or check whether there is a problem with the embryo tube rotation
Fault 4: Uneven wall thickness of PET bottle
Reasons: 1, the position of the drawing rod is not in the center of the embryo tube 2, the blowing hole is asymmetrical, the aperture is different 3, the drawing rate is too low or the blowing proportion is too small 4, the embryo tube does not rotate in the heating furnace 5, the embryo tube wall thickness is not equal or the injection density is not equal
Elimination methods :1, adjust the position of the stretching rod 2, adjust the position and aperture of the blowing hole 3, increase the stretching ratio or blowing proportion 4, check the rotation device 5, improve the quality of the embryo tube
Fault 5: The upper part of the bottle is too thick
Reasons: 1, the upper temperature is too low 2, the mold vent position is too far from the upper 3, the drawing rate is too low 4, the upper part of the bottle blowing ratio is too low 5, the drawing rod speed is too slow
Elimination method: 1, upper heating 2, adjust the position of the exhaust hole 3, increase the tensile ratio 4. Change the shape of the bottle 5. Adjust the stretch rod speed
Fault 6: Bottle bottom is too thin
Reasons: 1, start blowing time too early 2, the bottom temperature is too high 3, the bottom of the embryo tube is too thin
Elimination methods: 1, delay the start of blowing time 2, reduce the bottom temperature 3, increase the bottom thickness of the embryo tube
Fault 7: The bottle closing line is obvious
Reasons: 1, the sealing pressure is not enough 2, the sealing time is too early 3, the mold problem 4, the size of the mouth of the embryo tube does not match the mold
Elimination method: 1, increase the clamping pressure, adjust the Angle of the clamping rod (<5 degrees) 2, move back the clamping stroke switch position 3, repair the mold or check the mold assembly position, such as whether the guide pillar is loose, or whether the mold is not pressed 4, repair the mold tooth matching position
Fault 8: The bottom of the bottle or the bottleneck is rolled up and accumulated material
Reasons: 1, delay blowing time is too long 2, a roll, a good 3, the temperature at the accumulation of material is too low 4, the action of the air pressure is unstable, affecting the drawbar decline speed
Elimination method: 1, shorten the delay blowing time or reduce the drawbar decline speed 2, reduce the volume of the cylinder side 3, increase the heating temperature of the embryo tube 4, add a gas storage tank to the action air source, or shorten the gas supply pipeline
Fault 9: The bottom of the bottle stretching perforation
Reasons: 1, the temperature is not enough, not penetrated 2, the delay drawing time is too long 3, the drawing ratio is too large 4, the bottom of the embryo tube is too thin 5, the drawing rod head is too sharp
Elimination methods: 1, heating 2, shorten the delay drawing time 3, reduce the drawing ratio 4, improve the bottom design of the embryo tube 5, round the drawing rod head
Failure 10: bottle bottom blasting
Reasons: 1, delay blowing time is too short 2, delay opening mold time is too short 3, the temperature is too high 4, the exhaust valve does not work
Elimination method: 1, lengthen the delay blowing time or increase the drawbar decline speed 2, lengthen the delay opening time 3, cooling 4, clean the exhaust valve with gasoline
Fault 11: Bottle bottom 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 bottle is insufficient or uneven 3, the drawing rod is not to the bottom 4, the design of the drawing rod head is not in line with the shape of the bottom of the blank tube 5, the blowing pressure is not enough 6, the flow rate of the blowing valve is not enough 7, the design of the bottom curve of the bottle is not good
Elimination methods: 1, reduce the temperature at the bottom of the heating area or use a wet cloth to reduce the temperature at the bottom of the blank tube 2, increase the number of exhaust holes and make it evenly distributed 3, adjust the stretching rod to the bottom of the bottle 4, replace the stretching rod head 5, increase the blowing pressure 6, clean the blowing valve with gasoline 7, increase the streamline design of the bottle bottom curve
Failure 12: Causes: 1, if relative to the tooth of the embryo tube in a specific orientation, the uneven thickness of the embryo tube 2, if relative to the mold closing line in a specific orientation, the mold exhaust problem 3, the embryo tube heating is not uniform 4, the bottom of the mold design is poor
Elimination method: 1, improve the thickness of the embryo tube design 2, improve the bottom of the mold exhaust 3, improve the heating conditions 4, improve the bottom design
Fault 13: The blowing machine has no power indication
Reasons: 1, the socket has no power 2, the safety tube is broken 3, the wire is off 4, the safety emergency switch is not opened 5, the power switch is opened and placed ON 6, the indicator light is damaged 7, the small circuit breaker of the control socket in the heating furnace is closed
Elimination method: 1, check whether the socket has electricity, leakage switch trip 2, check whether the line is short circuit, and then replace the safety tube 3, connect the connector 4, open the emergency safety switch 5, the power switch ON 6, replace the indicator 7, close the circuit breaker




3. Key words: film charter
Film charter manufacturers, how to choose film charter, which is good film charter, how much is the film charter, film charter customization,KIWL film charter, Xinzi whale film charter, China film charter

Related articles

Recommended news

0086-18151132311 402687220@qq.com