How to maintain and maintain the bottle blowing machine?(2)

Blow molding machine troubleshooting tips

The bottle blowing machine is the crystallization of the integration of machinery, electronic control, and hydraulics. It is electrically complex, has crisscrossed hydraulic pipelines, has various controllers, and has various fault phenomena. There are thousands of components in a large bottle blowing machine. If one of the components is faulty, it will cause abnormal phenomena in the bottle blowing machine. There will also be problems with the connection of the wires. A little negligence will cause problems. In addition, Large bottle blowing machines are bulky and can easily cause malfunctions due to environmental influences when used in a blowing workshop without a constant temperature. For this reason, the problem of "difficult maintenance" of imported bottle blowing machines is placed in front of us.

How can faults and hidden dangers be quickly identified and eliminated in a timely manner? I believe that first of all, we must have a high sense of responsibility; second, we must strive to master CNC hydraulic technology. Years of practice in repairing bottle blowing machines believe that we need to read more, ask more questions, remember more, think more, and practice more to gradually improve our technical level. and maintenance capabilities to adapt to various more complex situations, solve difficult problems, and repair the bottle blowing machine.

1. Learn more about the electronic circuit information of the bottle blowing machine

You need to read more and understand the characteristics and functions of various bottle blowing machine electronic circuit systems and PC and PLC programmable controllers; you need to understand the alarms and troubleshooting methods of the bottle blowing machine electronic circuit system; you need to understand PC and PLC bottle blowing machines. The meaning of parameter setting; you need to understand the programming language of PC and PLC; you need to understand the method of programming the bottle blowing machine action; you need to understand the operation of the bottle blowing machine control panel and the contents of each menu. There is often a lot of information. How do you read it? I think the main thing is to highlight the key points and understand the ins and outs. The key point is to understand the basic composition and structure of the bottle blowing machine controller and master the block diagram. The rest can be "toured" and read through, but each part of the content must be understood and mastered. Since the internal circuit diagram of the bottle blowing machine controller is quite complex, the manufacturer does not provide it. Therefore, it is not necessary to understand it in detail. It is necessary to focus on understanding the role of each part, the functions of each board, the whereabouts of the interfaces, the meaning of the LED lights, etc. Nowadays, there are many types of bottle blowing machine controllers and they are updated quickly. Different manufacturers and different models often vary greatly. To understand their commonalities and individualities.

2. Pay more attention to the electrical diagram of the bottle blowing machine and the electrical diagram of the digestion bottle blowing machine.

Each electrical component, such as contactors, relays, time relays, etc., as well as the input and output of PCs and PLCs, must be noted one by one on the electrical diagram.

3. Read more about the hydraulic diagram of the bottle blowing machine and digest it thoroughly.

For the mechanical and hydraulic diagram of the bottle blowing machine, it is necessary to understand its function and ins and outs. And indicate them one by one on the drawings, such as which solenoid valve is used to clamp the mold? What are the corresponding PC and PLC outputs and inputs? Write it down on the diagram, so that you can go from electrical to mechanical action in one go. At the same time, you should focus on understanding the parts that are closely related to machinery and electricity. Nowadays, bottle blowing machines use electro-hydraulic proportional technology, and you should focus on understanding their functions and functions, especially It is necessary to understand the adjustment method and adjustment data, the static and dynamic proportional valve current and the corresponding pump pressure, understand both electricity and machinery, mechatronics, and master a variety of skills, so that the ability to solve problems will be greater.

12 common fault points of bottle blowing machines

Blow molding machine failure 1: Poor transparency of PET bottles

Reasons: 1. The heating temperature is too high 2. The heating time is too long 3. The compressed air contains moisture 4. The injection molded embryo tube itself is opaque 5. The design of the embryo tube is inappropriate 6. The blowing ratio is too small

Troubleshooting 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 increase the dryness of the raw materials 5. Improve the size design of the embryo tube 6. Reduce the diameter of the embryo tube

Blow molding machine failure 2: PET bottles appear pearly and white.

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

Troubleshooting methods: 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 raise the outer cover of the heating device to increase the surface temperature dissipation of the embryo tube

Blow molding machine failure 3: The position of the water outlet at the bottom of the PET bottle is offset.

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

Troubleshooting methods: 1. Delay the blowing time or increase the descending speed of the stretching 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, or check whether there is any problem with the rotation of the embryo tube

Blow molding machine failure 4: Uneven wall thickness of PET bottles

Reasons: 1. The position of the stretching rod is not in the center of the embryo tube 2. The blowing holes are asymmetrical and have different hole diameters 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 wall of the embryo tube Uneven thickness or uneven injection density

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

Blow molding machine failure 5: The upper part of the bottle is too thick

Reasons: 1. The temperature of the upper part is too low 2. The position of the mold exhaust 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 is too low 5. The stretching rod speed is too slow

Troubleshooting methods: 1. Heating the upper part 2. Adjust the position of the exhaust hole 3. Increase the stretch ratio 4. Change the shape of the bottle 5. Adjust stretch rod speed

Blow molding machine failure 6: The bottom of the bottle is too thin

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

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

Bottle blowing machine fault 7: The bottle mold closing line is obvious

Reasons: 1. Insufficient mold clamping pressure 2. Too early sealing time 3. Mold problems 4. The size of the embryo tube tooth opening does not match the mold

Troubleshooting method: 1. Increase the mold closing pressure and adjust the mold closing support rod angle (<5 degrees) 2. Move the mold closing stroke switch position backward 3. Repair the mold or check the mold assembly position, such as whether the guide pillar is loose, or Is the mold not pressed tightly? 4. Repair the fitting position of the mold teeth.

Bottle blowing machine fault 8: The bottom or neck of the bottle is rolled up and material accumulates

Reasons: 1. The delayed air blowing time is too long 2. One roll, one is good 3. The temperature at the accumulation point is too low 4. The operating air pressure is unstable, which affects the descending speed of the stretch rod

Troubleshooting methods: 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 roll bottle 3. Increase the heating temperature of the embryo tube 4. Add an air storage tank to the operating air source, or Shorten the air supply pipeline

Blow molding machine failure 9: Stretching and perforation at the bottom of the bottle

Reasons: 1. The temperature is not enough and there is no penetration. 2. The delayed stretching time is too long. 3. The stretching ratio is too large. 4. The bottom of the embryo tube is too thin. 5. The stretching rod head is too sharp.

Troubleshooting methods: 1. Heating 2. Shorten the delayed stretching time 3. Reduce the stretching ratio 4. Improve the design of the bottom of the embryo tube 5. Round the stretching rod head

Blow molding machine failure 10: Bottle bottom explosion

Reasons: 1. The delayed air blowing time is too short 2. The delayed mold opening time is too short 3. The temperature is too high 4. The exhaust valve does not work

Troubleshooting methods: 1. Extend the delayed air blowing time or increase the descending speed of the stretch rod 2. Extend the delayed mold opening time 3. Cool down 4. Clean the exhaust valve with gasoline

Blow molding machine failure 11: The bottom of the bottle is not full

Reasons: 1. The temperature at the bottom of the bottle is too high 2. Insufficient or uneven vent holes at the bottom of the mold bottle 3. The stretching rod does not reach the bottom 4. The design of the stretching rod head does not conform to the shape of the bottom of the embryo tube 5. Insufficient blowing pressure 6 , Insufficient flow of the blow valve 7. Poor design of bottle bottom curve

Troubleshooting method: 1. Reduce the temperature at the bottom of the heating zone or use a wet cloth to reduce the temperature at the bottom of the embryo tube. 2. Increase the number of exhaust holes and make them evenly distributed. 3. Adjust the stretching rod to the bottom of the bottle. 4. Replace the stretching rod head. 5. Increase the blowing speed. Air pressure 6. Use gasoline to clean the blow valve 7. Add a streamlined design to the bottom curve of the bottle

Blow molding machine failure 12:

Reasons: 1. If the tooth part of the embryo tube is at a specific orientation, it is due to uneven thickness of the embryo tube. 2. If it is at a specific orientation relative to the mold closing line, it is a mold exhaust problem. 3. The embryo tube is not heated properly. Uniform 4. Poor design of the bottom of the mold

Troubleshooting methods: 1. Improve the thickness design of the embryo tube 2. Improve the vent hole at the bottom of the mold 3. Improve the heating conditions 4. Improve the bottom design

Conclusion:

In an era where sustainability and energy efficiency are paramount, the bottle blowing machine industry is also experiencing significant shifts. Energy-saving and eco-friendly practices have become the driving force behind innovation in this field. Manufacturers are exploring ways to reduce energy consumption without compromising on the quality and speed of production. As the industry keeps evolving, these advancements will continue to play a pivotal role.