With what method can make the film blowing machine cooling
Chinese film blowing machine Performance and blown film technology is blown film machine, blown film quality of two factors.The former belongs to the hardware facilities, to pay attention to the maintenance of blown film machine, improve the service life of the machine, the latter's improvement, mainly affected by practical experience.In order to improve the work efficiency of dalian blown film machine, use reasonable cooling method according to different situation, is to improve the work efficiency and effective way to reduce the production cost.
Blown film machine of the material under high temperature molten state, through a circular opening mould, and then through the air expansion extrusion forming, in this phase, tubular membrane in molding (mold exports and the area between the cooling line) subjected to severe cooling process, need to be set in the cooling system.Blown film machine cooling method is divided into two kinds: the external and internal cooling cooling.
1, internal cooling directly through membrane bubble cooling for cooling purposes.Because film bubble inside air flow rate is relatively low, and there is no regularity, so external cooling is good.
2, external cooling method is the manner in which the earliest application, under the effect of cooling ring, through a along the extrusion direction and release membrane bubble on the surface of circular ring cooling air to generate uniform cooling air around the ring.In the cooling ring inside, the air flowing in faster average speed relative to the next is expelled.Ensure that the shape of the membrane bubble is consistent with the air cooling ring, increase the average flow velocity of air and thus increasing the heat transfer.
Blown film machine, blow molding process to ensure the quality of thin film products, film formation must be considered the stability of the membrane before the bubble, can effectively control the product percent of pass.Production of blown film machine, blown film, in addition to the restricted by membrane bubble, also considering the blown film machine cooling system.A perfect cooling system need reasonable configuration and stability of the blown film machine.
Relevant tags:Dalian blown film machine