西班牙语Change rule of PET bottle blowing machine after adjustment of process parameters
Temperature before bottle preform heating (ambient temperature)
1. High temperature, low heating power, fast temperature rise, and easy expansion of threaded opening
2. Low temperature, large heating power, slow temperature rise, easy to crack and crack at the bottom
Light box cooling air flow
1. Large flow, bottle embryo cooling transition, slow temperature rise, unable to meet the requirements of bottle blowing
2. Low flow rate, high external temperature and low internal temperature of bottle embryo, resulting in blow-out, whitening and double-layer bottle
Temperature of bottle preform after heating
1. Bottles with high temperature will produce high temperature crystals, and the color is milky white and white
2. Bottles with low temperature will produce excessive tensile crystallization, and the color is foggy and white
Bottom heating temperature
1. At high temperature, the thickness of the bottle bottom will be thin and convex, and the stress test time will be shorter
2. Low temperature and thickness of bottle bottom will cause crack
Pre-blowing position (relative to the position where the stretching rod contacts the bottom of the bottle embryo)
1. The bottom of the front bottle is thin, the thickness of the bottle foot is thin, and it will be foggy and white if it is serious, the weight of the bottom is light, and the injection point is eccentric
2. The bottom of the bottle is thick and the bottom of the bottle is thick. The bottom material cannot be blown open
Pre-blowing pressure
1. The pressure is high, the bottom of the bottle is thin, the thickness of the bottle foot is thin, and it will be foggy white or even blown out seriously, the weight of the bottom is light, and the injection point is eccentric
2. The pressure is low, the bottom thickness of the bottle is thick, and the bottom material cannot be blown open
Bottom mold cooling water temperature
1. The bottom of the bottle above 15 ℃ will not cool well, and when it is serious, it is convex, flat and not full, easy to produce stress, and easy to burst in the drop test
2. If the bottom mold is too low, it will produce condensation, and there is water mark at the bottom of the bottle when it is just started
Mold circulating water temperature
1. Increase the bottle capacity to reduce
2. Reduce the capacity of the bottle to increase the water mark on the bottle body
Pre-blowing flow
1. The bottom of the bottle with large flow rate is thin, the thickness of the bottle foot is thin, and it will be foggy and white if it is serious, the weight of the bottom is light, and the injection point is eccentric
2. The flow is small, the bottom of the bottle is thick, the thickness of the bottle foot is thick, and the bottom material blowing machine is difficult to blow open
Exhaust position
1. The front cooling crystallization is not good, the temperature is high, the bottle is easy to shrink, and the capacity is small
2. Bottle capacity increases at the rear
1. High temperature, low heating power, fast temperature rise, and easy expansion of threaded opening
2. Low temperature, large heating power, slow temperature rise, easy to crack and crack at the bottom
Light box cooling air flow
1. Large flow, bottle embryo cooling transition, slow temperature rise, unable to meet the requirements of bottle blowing
2. Low flow rate, high external temperature and low internal temperature of bottle embryo, resulting in blow-out, whitening and double-layer bottle
Temperature of bottle preform after heating
1. Bottles with high temperature will produce high temperature crystals, and the color is milky white and white
2. Bottles with low temperature will produce excessive tensile crystallization, and the color is foggy and white
Bottom heating temperature
1. At high temperature, the thickness of the bottle bottom will be thin and convex, and the stress test time will be shorter
2. Low temperature and thickness of bottle bottom will cause crack
Pre-blowing position (relative to the position where the stretching rod contacts the bottom of the bottle embryo)
1. The bottom of the front bottle is thin, the thickness of the bottle foot is thin, and it will be foggy and white if it is serious, the weight of the bottom is light, and the injection point is eccentric
2. The bottom of the bottle is thick and the bottom of the bottle is thick. The bottom material cannot be blown open
Pre-blowing pressure
1. The pressure is high, the bottom of the bottle is thin, the thickness of the bottle foot is thin, and it will be foggy white or even blown out seriously, the weight of the bottom is light, and the injection point is eccentric
2. The pressure is low, the bottom thickness of the bottle is thick, and the bottom material cannot be blown open
Bottom mold cooling water temperature
1. The bottom of the bottle above 15 ℃ will not cool well, and when it is serious, it is convex, flat and not full, easy to produce stress, and easy to burst in the drop test
2. If the bottom mold is too low, it will produce condensation, and there is water mark at the bottom of the bottle when it is just started
Mold circulating water temperature
1. Increase the bottle capacity to reduce
2. Reduce the capacity of the bottle to increase the water mark on the bottle body
Pre-blowing flow
1. The bottom of the bottle with large flow rate is thin, the thickness of the bottle foot is thin, and it will be foggy and white if it is serious, the weight of the bottom is light, and the injection point is eccentric
2. The flow is small, the bottom of the bottle is thick, the thickness of the bottle foot is thick, and the bottom material blowing machine is difficult to blow open
Exhaust position
1. The front cooling crystallization is not good, the temperature is high, the bottle is easy to shrink, and the capacity is small
2. Bottle capacity increases at the rear
