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Miss.Cai 13717346368
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How to make use of the cooling device of the film blowing machine
In order to improve the working efficiency of the film blowing machine, it is an effective way to improve the working efficiency and reduce the production cost.
The performance of blown film machine and film blowing technology are the two factors restricting the quality of blown film. The former belongs to the hardware facilities, it is necessary to pay attention to the maintenance of film blowing machine, improve the life of the machine, the latter's improvement, mainly due to the impact of practical experience.
In order to ensure the quality of the film, the stability of the film bubble before the film formation must be considered, and the qualified rate of the product can be controlled effectively. Blown film blowing film production, in addition to the bubble film constraints, but also take into account the film blowing machine cooling system. A complete cooling system requires a reasonable configuration and stability.
Film blowing machine material in high temperature molten state, through an annular die, and then through the air expansion extrusion, at this stage, the tubular film forming section (between the die exit and cooling line area) to withstand the intense cooling process, the cooling system. There are two ways to cool the film blowing machine: external cooling and internal cooling.
1 external cooling method is the first application of the cooling ring, through the release of a direction along the extrusion direction and the outer surface of the bubble film to release the cooling air around the ring to produce uniform cooling air. Inside the cooling ring, the air in the upper opening is discharged with a faster average velocity relative to the lower port. The shape of the bubble is ensured to be consistent with that of the air cooling ring, so that the average velocity of the air is increased and the heat transfer is enhanced.
2 internal cooling directly through the film bubble cooling purposes. Because of the relatively low velocity of the air in the bubble, and the lack of regularity, external cooling is more dominant.
The performance of blown film machine and film blowing technology are the two factors restricting the quality of blown film. The former belongs to the hardware facilities, it is necessary to pay attention to the maintenance of film blowing machine, improve the life of the machine, the latter's improvement, mainly due to the impact of practical experience.
In order to ensure the quality of the film, the stability of the film bubble before the film formation must be considered, and the qualified rate of the product can be controlled effectively. Blown film blowing film production, in addition to the bubble film constraints, but also take into account the film blowing machine cooling system. A complete cooling system requires a reasonable configuration and stability.
Film blowing machine material in high temperature molten state, through an annular die, and then through the air expansion extrusion, at this stage, the tubular film forming section (between the die exit and cooling line area) to withstand the intense cooling process, the cooling system. There are two ways to cool the film blowing machine: external cooling and internal cooling.
1 external cooling method is the first application of the cooling ring, through the release of a direction along the extrusion direction and the outer surface of the bubble film to release the cooling air around the ring to produce uniform cooling air. Inside the cooling ring, the air in the upper opening is discharged with a faster average velocity relative to the lower port. The shape of the bubble is ensured to be consistent with that of the air cooling ring, so that the average velocity of the air is increased and the heat transfer is enhanced.
2 internal cooling directly through the film bubble cooling purposes. Because of the relatively low velocity of the air in the bubble, and the lack of regularity, external cooling is more dominant.
