Film blowing machine in the processing process to get quality control of plastic bag products, it is necessary to control each processing link in place. In general, plastic blowing Membrane machine processing process is divided into feeding heating, traction, control pneumatic edge. After the film head blowing air hole, gas added to the middle of the round film, film into a straight
Linear upward, the size of the plastic bag is controlled by how much air blowing, and then through the film stabilizer to stabilize the film. Thickness is controlled by the host and the traction speed.
This can be understood, the faster the host speed, feeding speed is fast, the film is thick, traction is just the opposite, the faster the pull, the film is thinner, this is The most important link.
In order to achieve the good transverse and longitudinal tension of the blown membrane, the burburr expansion ratio and DDR traction ratio must be reached to a certain proportion. If the proportion is out of proportion it will lead to
If the transverse tension decreases, if the membrane bubble is stable under the condition of existing die head and diameter reduction, it is ok to BUR, but if the membrane bubble is unstable
BUR is too large for the definite case; DDR= die clearance/(film thickness * BUR)
To reduce DDR, it is necessary to reduce the clearance between die orifice. Reducing BUR will only make DDR larger. If the film is not stable when blowing, the film head is indicated
If it is too small, the membrane can be stabilized with a fixator.
