How to control the size,thickness and tension of plastic bags in the production process of film blowing machine
In order to obtain plastic bag products with controllable quality in the processing process of film blowing machine,it is necessary to control all processing links in place.In general,the processing process of plastic film blowing machine is divided into feed heating,traction,and control of air pressure edging.After blowing air into the air hole of the die head,the air is added to the middle of the round film,and the film forms a direct shape upward.The size of the plastic bag is controlled by the amount of air blowing,and then the film is stabilized by the film stabilizer.The thickness is controlled by the rotating speed of the main engine and the traction.It can be understood that the faster the rotating speed of the main engine is,the faster the feeding speed is,the thicker the film is.The traction is just the opposite.The faster the pulling is,the thinner the film is.This is the most important link.
In order to achieve a good horizontal and longitudinal tension of the blown film,it is necessary to achieve a certain ratio of blowing ratio bur and traction ratio DDR.If the disproportion will lead to the reduction of transverse tension,if the membrane bubble is stable under the existing die head and bending diameter,then there is no problem with bur.If the membrane bubble is unstable,bur is too large;Ddr=die gap/(film thickness xbur)
To reduce DDR,you need to reduce the die gap.Reducing bur will only make the DDR larger.If the film swings unsteadily during film blowing,it means that the die head is too small,so you can use a fixed frame to stabilize the film.
