Inadequate sealing or air leakage of the storage blow molding machine is caused by many reasons. Today, let’s talk about the reasons and solutions for the inadequate sealing of the storage blow molding machine.
One is the insufficient pressure of the sealing cylinder.
If a low-pressure sealed cylinder is selected, the low-pressure pressure can be kept below 8 kg, and the general product is no problem. But it also depends on the high-pressure blowing pressure. If the high-pressure blowing pressure is too high, the sealing cylinder will be pressed down. If the high-pressure pressure is reduced, it can be blown into a bottle shape and try to reduce the high-pressure pressure. Or if the high pressure is too high and the clamping pressure is too small, the mold will be opened, which will also cause the seal to leak. The automatic clamping pressure can be increased.
The second is whether the sealing glue is damaged or is aligned with the sealing part. If it deviates from the sealing part, it will leak air.
Whether the cylinder block or seal of the sealing cylinder is damaged, if the seal is damaged, it can be directly reflected by opening the solenoid valve of the sealing cylinder.
Third, if the solenoid valve of the sealed cylinder is leaking or stuck or the exhaust is not smooth, these are also the reasons for the leakage of the sealed cylinder.
The fourth is that the blowing time is too early, the bottom temperature is too high, and the bottom of the embryo tube is too thin, which all cause the sealing to be inadequate. You can adjust the start blowing time, reduce the bottom temperature and increase the bottom thickness of the embryo tube.
Fifth, because the sealing time is too early, the clamping pressure is not enough; it is also related to the mold. If the size of the germ tube tooth mouth does not match the mold, the sealing will not be in place.
The solution is to increase the mold clamping pressure and adjust the mold clamping support rod angle to <5 degrees; you can also move the mold clamping stroke switch position back to repair the mold or check the mold assembly position to check whether the guide pillar of the hollow blow molding machine is loose and whether the mold is loose Press tightly; repair the matching position of the mold tooth mouth in time.
Sixth, the sealing of the blow molding machine is not in place caused by the improper clamping stroke.
Be sure to check and adjust the mold clamping stroke switch is broken; check whether the wire is off, and check whether the delay stretching time relay is damaged; check whether the lift solenoid valve and the stretching solenoid valve are damaged; check whether the cylinder intake and exhaust throttle valves are blocked Or shut down. The corresponding solenoid valve is faulty; the delay stretch time is set to 0. To
Remedy: move the clamping block forward, replace the mold clamping stroke switch, connect the thread, replace the time relay, replace the solenoid valve, check the hole position to ensure unobstructed flow; check the relevant solenoid valve; the delay stretch time setting cannot be less than 0.
Seventh, the bottom or neck of the barrel is rolled up and the material accumulates, which causes the delayed blowing time to be too long; the temperature at the material accumulation is too low; the air pressure for the action is unstable, which affects the descending speed of the stretch rod.
Remedy: shorten the delayed blowing time or reduce the descending speed of the stretch rod; reduce the air volume on the other side; increase the heating temperature at the embryo tube; add an air storage tank to the action air source, or shorten the air supply pipeline.
Eighth, because the bottom of the barrel is not full, the temperature at the bottom of the bottle is too high.
Insufficient or uneven vent holes at the bottom of the mold barrel, because the design of the stretch rod head does not conform to the shape of the bottom of the embryo tube, the stretch rod does not reach the bottom. Due to the insufficient flow of the blowing valve, the blowing pressure is insufficient. The bottom curve of the barrel is poorly designed.
Remedy: lower the temperature at the bottom of the heating zone or use a damp cloth to lower the temperature at the bottom of the embryo tube; increase the number of vent holes and make them evenly distributed; adjust the stretch rod to the bottom of the bottle.
The above content is the reason and solution for the reasons and solutions for the inadequate sealing of the storage blow molding machine.