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11 common problems and troubleshooting methods of blow molding machine! Blowing machine-professional production of machinery

by:Yosion Machinery     2021-07-14
Question 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 water 4. The injection embryo tube itself is opaque 5. The embryo tube design is unsuitable 6. The expansion ratio is too small. Elimination 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 material 5. Improve the design of the embryo tube size 6. Reduce the diameter of the embryo tube 2 PET bottles appear pearly luster White reasons: 1. The heating temperature is too low 2. The embryo tube wall thickness is uneven 3. The embryo tube thickness is too thick, and the heating and penetration are insufficient. Elimination methods: 1. Increase the temperature 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 increase the outer cover of the heating device to increase the surface temperature of the embryo tube. 3 Reasons for the offset of the nozzle position at the bottom of the PET bottle: 1. The blowing time is too early 2. The stretching rod is not lowered to the bottom 3. The stretching rod Offset from the center line of the bottle axis 4. The embryo tube wall thickness is uneven or the injection density is uneven 5. The heating is uneven. Elimination 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 stretch 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. The reasons for the uneven wall thickness of the PET bottle: 1. The position of the stretch rod is not in the center of the embryo tube. 2. The blowing holes are asymmetrical , The pore diameter is not one 3, the stretching ratio is too low or the expansion ratio is too small 4, the embryo tube does not rotate in the heating furnace 5, the embryo tube wall thickness or injection density is uneven. Elimination method: 1. Adjust the position of the stretching rod 2. Adjust the position and diameter of the blowing hole 3. Increase the stretching ratio or expansion ratio 4. Check the rotation device 5. Improve the quality of the embryo tube 5. Reasons for the thick upper part of the bottle: 1. The upper temperature is too low 2. The mold exhaust hole 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 stretching rod speed is too slow. Remedy: 1. Heating the upper part 2. Adjust the position of the vent 3. Increase the stretching Magnification 4. Change the shape of the bottle 5. Adjust the speed of the stretch rod. 6 The bottom of the bottle is too thin. Reasons: 1. The blowing time is too early. 2. The bottom temperature is too high. 3. The bottom of the embryo tube is too thin. Remedy: 1. Delay the blowing time. 2. Lower the bottom temperature. 3. , Increase the bottom thickness of the embryo tube 7 obvious reasons for the mold clamping line: 1. Insufficient mold clamping pressure 2. Sealing time is too early 3. Mold problem 4. The size of the embryo tube tooth mouth does not match the mold. Elimination method: 1. Increase the mold clamping Pressure, adjust the mold clamping support rod angle (<5 degrees) 2. Move the mold clamping stroke 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 compressed 4. Repair the mold Thread mouth fit problem 8 The bottom of the bottle or the bottleneck is rolled up, and the cause of the material accumulation: 1. The delayed blowing time is too long 2. One roll is good 3. The temperature at the accumulation place is too low 4. The air pressure of the action is unstable, which affects the pulling Exclusion methods for the descending speed of the extension rod: 1. Shorten the delay blowing time or reduce the descending speed of the extension rod. 2. Reduce the air volume on one side of the reel. 3. Increase the heating temperature of the embryo tube. 4. Add an air storage tank to the action. Air source, or shortening the air supply pipeline. 9 Reasons for the bottom of the bottle to stretch and perforate: 1. The temperature is not enough, no penetration 2. The delay stretch time is too long 3. The stretch ratio is too large 4. The bottom of the embryo tube is too thin 5. Tips for drawing the tip of the tip: 1. Heat 2. Shorten the extension time 3. Reduce the stretch ratio 4. Improve the design of the bottom of the embryo tube 5. Round the stretched tip 10 Causes of bottom blasting: 1 1. Delayed blowing time is too short 2. Delayed mold opening time is too short 3. Temperature is too high 4. Exhaust valve does not work Remedy: 1. Lengthen the delayed blowing time or increase the descending speed of the stretching rod 2. Lengthen Delay mold opening time 3. Cool down 4. Use gasoline to clean the exhaust valve. 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 is insufficient or uneven. 3. The stretch rod is not enough. To the bottom 4. The design of the stretched rod head does not conform to the shape of the bottom of the embryo tube 5. The blowing pressure is not enough 6. The flow of the blowing valve is not enough. The bottom curve design of the bottle is not good. Remedy: 1. Reduce 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 number of exhaust holes and make it evenly distributed 3. Adjust the stretch rod to the bottom of the bottle 4. Replace the stretch rod head 5. Increase the blowing pressure 6. Clean the blowing valve with gasoline 7. Increase the bottle Bottom curve streamline design problem 12 The reasons for the offset of the nozzle position at the bottom of the PET bottle: 1. The blowing time is too early 2. The stretch rod is not down to the bottom 3. The stretch rod and the center line of the bottle axis are offset 4. The wall thickness of the embryo tube is uneven Or uneven injection density 5. Uneven heating elimination method: 1. Delay the blowing time or increase the descending speed of the stretch rod 2. Adjust the position of the magnetic pole switch 3. Adjust the position of the stretch rod 4. Improve the quality of the embryo tube 5. Improve the heating Condition, or check if there is any problem with the rotation of embryo tube
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