11 common problems and troubleshooting methods for blow molding machines!

Problem 1 Reasons for poor transparency of PET bottles: 1. The heating temperature is too high 2. The heating time is too long 3. The compressed air contains moisture 4. The injection molding embryo tube itself is opaque 5. The embryo tube design is not suitable 6. The inflation ratio is too small. Remedy: 1. Cool down 2. Shorten the heating time 3. Use a dryer to remove water 4. Improve the quality of the embryo tube, select the materials and increase the dryness of the raw material 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. Remedy: 1. Heat up or slow down the revolution speed 2. Improve the quality of the embryo tube 3. Reduce the embryo The thickness of the tube, or try to raise the cover of the heating device to increase the temperature of the surface of the embryo tube. 3. The position of the nozzle at the bottom of the PET bottle is offset. 4. The wall thickness of the embryo tube is uneven or the injection density is uneven. Adjust the position of the stretch rod 4. Improve the quality of the embryo tube. 5. Improve the heating conditions, or check whether there is a problem with the rotation of the embryo tube. 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 thickness of the embryo tube is uneven or the injection density is uneven Remedy: 1. Adjust the position of the stretching rod 2. Adjust the position and diameter of the blowing hole 3. Increase the stretching ratio or inflation ratio 4. Check the rotation device 5. Improve the quality of the embryo tube 5. The upper part of the bottle is too thick. The position is too far from the top 3. The stretching ratio is too low. 4. The inflation ratio of the upper part of the bottle is too low. 5. The speed of the stretching rod is too slow. magnification 4. Change the shape of the bottle 5 . Adjusting the speed of the stretching rod 6. The bottom of the bottle is too thin. Reasons: 1. The time to start blowing is too early. 2. The temperature of the bottom is too high. 3. The bottom of the embryo tube is too thin. , Increase the thickness of the bottom of the embryo tube 7. The obvious reasons for the clamping line of the bottle: 1. The clamping pressure is not enough 2. The sealing time is too early 3. The mold problem 4. The size of the tooth opening of the embryo tube does not match the mold. Remedy: 1. Increase the clamping pressure, adjust the angle of the clamping strut (<5 degrees) 2. Move the mold closing travel switch position back 3. Repair the mold or check the mold assembly position, such as whether the guide post is loose, or whether the mold is not pressed tightly 4. Repair the mold mouth fit problem 8. Bottle bottom or neck roll Reasons for starting and accumulating: 1. Delayed air blowing time is too long. 2. One roll is good. 3. The temperature at the accumulating place is too low. Delay the blowing time or reduce the descending speed of the stretching rod 2. Reduce the air volume on one side of the bottle 3. Increase the heating temperature of the embryo tube 4. Add an air storage tank to the action air source, or shorten the air supply pipeline. Reasons for stretching and perforating the bottom of the bottle: 1. Insufficient temperature and no penetration. 2. Delayed stretching time is too long. 3. The stretching ratio is too large. 4. The bottom of the embryo tube is too thin. , heating 2, shortening the delay stretching time 3, reducing the stretching ratio 4, improving the design of the bottom of the embryo tube 5, rounding the stretching rod head problem 10 bottle bottom blasting reasons: 1. The delay 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. Remedy: 1. Extend the delayed blowing time or increase the descending speed of the stretching rod 2. Extend the delayed mold opening time 3. Cool down 4. Cleaning the exhaust valve with gasoline 11. The bottom of the bottle 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 stretching rod has not reached the bottom. 4. The design of the stretching rod head is not good. In line with the shape of the bottom of the embryo tube 5, the blowing pressure is insufficient 6, the flow rate of the blow valve is insufficient 7, the bottle bottom curve design is not good Remedy: 1. Lower the temperature at the bottom of the heating zone or use a damp cloth to reduce the temperature at the bottom of the embryo tube 2. Increase the vent hole Quantity 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 curve of the bottom of the bottle. Offset reasons: 1. Start blowing time too early 2. The stretching rod did not go down to the bottom 3. The stretching rod and the center line of the bottle shaft are offset 4. The wall thickness of the embryo tube is uneven or the injection density is uneven 5. The heating is uneven Remedy: 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