The working process of the high-speed blow molding machine
The blow molding process of high-speed blow molding machine products includes: stretching - initial blow - second blow. The time for these three actions is very short, but they need to be well coordinated, especially the first two steps determine the overall distribution of the material and the quality of the blow molding. Therefore, adjustments are needed: starting time of stretching, stretching speed, start and end time of pre-blowing, pre-blowing pressure, pre-blowing flow rate, etc. If possible, control the overall temperature distribution of the preform. The temperature gradient between the inner and outer walls of the blank. During the rapid blow molding and cooling process, induced stress will appear in the bottle wall. For carbonated beverage bottles, it can resist internal pressure, which is beneficial, but for hot filling bottles, it ensures complete release above the glass transition temperature.
How many chillers are needed for the blow molding machine for carbonated beverages?
The cooler for carbonated beverage bottles is about 5 times larger than that for water bottles. Taking 1200 bottles per horsepower as an example, a simple calculation can be made: 36,000 bottles per hour can be equipped with a 30-horsepower water chiller. To ensure the stress requirements at the bottom of the carbonated bottle, the cooling time is generally 1.2 seconds, and the temperature of the bottom mold is 11 degrees. The number of lamp zones equipped in the heating furnace can refer to the configuration of hot filling machines, and the effective heating time of the bottle preform should not be less than 33 seconds.
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Summary：
The blow molding process of the high-speed blow molding machine includes: stretching - initial blow - second blow. The duration of these three actions is very short, but they need to be well coordinated, especially the first two steps determine the overall distribution of the material and the quality of the blow molding. Therefore, adjustments are needed for: the start time of stretching, stretching speed, start and end time of pre-blowing, pre-blowing pressure, pre-blowing flow rate, etc. If possible, it is to control the overall temperature distribution of the preform. The temperature gradient of the inner and outer walls of the blank. During the rapid blow molding and cooling process, induced stress will appear in the bottle wall. For carbonated beverage bottles, it can withstand internal pressure, which is beneficial, but for hot-filled bottles, it ensures complete release above the glass transition temperature.
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Date：
2024-12-01
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