Operation of the three-layer co extrusion blown film machine

The downward rotation of the three-layer co extrusion film blowing machine refers to the continuous 360 degree rotation of the film blowing die during film blowing. The film undergoes 360 degree cyclic operation to eliminate the phenomenon of "bulging" caused by the thickness of the film bubbles. The traction and herringbone clamp remain stationary at all times. Thin films are prone to wrinkles and their strength decreases; If the inflation ratio is too small, it will increase consumption and reduce the effective volume of the product.

The strength of the film decreases; If the inflation ratio is too small, it will increase consumption, reduce the effective volume of the product, thicken the product, and prolong the cooling time, resulting in increased costs. Most PEs are used for blown film processing, and both general-purpose low-density PE (LDPE) and linear low-density PE (LLDPE) are available.

HDPE film grade is generally used in places that require superior tensile strength and good impermeability. Only by properly matching the inflation ratio with the traction ratio can good products be produced. For example, generally speaking, the blowing ratio of low-density polyethylene (LDPE) films should be controlled between 2.5-3.0. The quality of the film material blown out by this processing technology is related to the blowing machine and plastic particles.

Its production equipment is simple, investment is low, and the product takes effect quickly; High mechanical properties of thin films; No edge material, less waste; The thin film product is cylindrical and the bag making process is simple; The characteristic of being able to produce large and wide films. During the transition process, due to friction between plastic and screw, plastic and barrel, as well as collision and friction between particles, and also due to external heating of the barrel, it gradually dissolves.

Drive the reducer through belt transmission to rotate the screw in the barrel; The plastic particles melted in the hopper under external heating are filtered through a three-way filter and squeezed from the mold mouth. Traction is composed of main components such as traction frame, herringbone board, traction roller, coiling mechanism, and traction motor.