English
The present utility model discloses a 7-layer co extrusion blown film equipment for producing high barrier films. This device is suitable for medical and food use. In the fields of semiconductor optoelectronics, aviation fuel, and new energy materials.
The structural advantage of this device lies in:
Adopting domestic independent research and development design, replacing the high prices of foreign countries. Improve cooling speed and production capacity, enhance film tensile strength and glossiness, and improve thickness uniformity.
Adopting independently developed and designed planar stacking structure, mold, uniform discharge, good mixing effect, suitable for plasticization and mixing of various material formulas,
Adopting a new multifunctional winding machine, the winding is neat and the torque is stable. Equipped with a 360 degree rotating structure.
Adopting a new structure of high-yield screw to increase extrusion volume while ensuring raw material plasticization and mixing.
Can be processed. Symmetric and asymmetric high barrier materials, co extruded PE/TIE/PA/EVOH, and in mold composite.
The device structure:
S1， The rack is welded and assembled with steel structure, equipped with stairs, corridors, and guardrails.
S2， There is an electric lifting water ring located below the center of the first platform of the rack, which can be freely adjusted in height according to the inflation specifications
S3， At the location where the water ring installation track is moved, there are straight tracks, brackets, and adjustable brackets for easy cleaning and adjustment.
S4， Place it under the water ring. Traction device, equipped with traction rollers, cylinders, and drive motors.
S5， Install an electric herringbone board and a sink on the lower side of the traction device to flatten the circular film bubble into a sheet shape.
S6， The extrusion area is evenly distributed at 270 degrees by 7 extruders. Equipped with a reducer, drive motor, hopper, screw, and cooling fan. Heater, screen changer.
S7， The mold adopts a planar stacked branch structure, which solves the problem of dead corners and large temperature differences in the flow of raw material solution.
S8， The wind ring adopts a high-speed cooling structure, which is suitable for shaping the blown film process with high production capacity and twice blowing expansion. The membrane foam has good stability. High production efficiency.
S9， The winding machine adopts a multifunctional flipping (center winding) structure, equipped with automatic cutting instead of manual operation for changing rolls,
S10， The main fan is equipped with an air outlet duct and an air diversion chamber, which evenly distributes the air flow into the cooling film bubbles inside the air ring.
S11， The electrical control cabinet is equipped with digital display instruments, electrical switch components, frequency converters, and rotary switches.
S12， The bottom of the winding machine is equipped with a rotating gear plate, which runs smoothly 360 degrees. It is equipped with a drive motor, platform bracket, rotating carbon brush, and drainage pipe.
Equipment process flow:
S1 mixes the raw materials evenly and proportionally, and they enter the hopper through the suction machine. The raw materials then enter the screw by their own weight.
S2， After the external barrel of the screw is heated, the granular raw material is melted into a melt, which is driven by a motor to drive the reducer and rotate the screw to form a spiral thrust, compressing the melt into the screen changer, distributor, and mold. Form a circular mold base from the mold.
S3， Inject air into the bottom of the mold, blow the mold base into a cylindrical shape, and after initial cooling by the air ring. The inlet ring is fixed and stable. With the direction of the gauze water flow, the membrane bubble vertically flows from top to bottom, enters the zigzag board and is flattened into a sheet shape, and then enters the rotating traction device. Stretch into a thin film of the required thickness.
S4， The film passes through the guide rollers and enters the drying device for processing,
S5， The film enters the winding traction device and flattens the rod area. Enter the AB dual station winding section and roll the center into a cylindrical film.
S6， Roll the film up to the set meter. Automatically flip. Automatic cutting,
S7， The winding is a 360 degree rotating mechanism that improves the flatness of the film. Ensure the stability of the membrane bubbles.
