The film blowing attachment type LF-400
is equipped as follows:
2.3-meter high film tower with twin pillars of rigid extruded aluminum
profiles. Sub cabinet of modern pleasing design, which incorporates the
control cabinet as well as the air blower for the cooling ring. Whole
assembly is fitted with four heavy-duty casters (two of the casters have
locks to fix the unit in a permanent position).
width 400 mm, which can accommodate film lay flat widths of up to 300
Pneumatically operated nip rolls with controls on sub cabinet.
mounted on the two aluminum pillars, adjustable in height to fit
extruder flange. Film die diameter is a standard 50 mm, giving a blown
film diameter of around 150 mm. (other die diameters can be supplied on
request). Die mandrel equipped with spiral flow channels for uniform
distribution of polymer melt around entire die area. All internal die
parts are hard chromed and highly polished. Adjustable die centering for
accurate film thickness control.
Two digital self-tuning temperature controllers, one for the film die
and the other for the S-adaptor to the extruder. The controllers are
mounted on the sub cabinet of the unit.
twin channel cooling ring for optimum cooling efficiency. The upper and
lower channels are equipped with adjustable airflow lips. Air supplied
from a 1 HP turbo blower.
bubble stabilizing rods as well as synchronous adjustable film
collapsing frame using polished teak wood slats.
Infinitely variable speed drive of the nip rolls.
guide rollers for downside feeding of the blown film.
Inspection cabinet with lamps placed on downside of film tower. The
lamps shine through the film for easy inspection of film quality.
up rolls driven via an adjustable clutch by a variable speed motor for
precise tensioning of the film. Easily removable film bobbin clamped
onto a shaft with pinions, resting on two inclined racks. This system
enables fast threading of new film and gives a tight wind-up.
cabinet as well as control cabinet in the sub cabinet, containing all
controls such as two temperature controllers for the die, on/off push
buttons for blower, nip roll and windup drives as well as pneumatic
opening/closing of the nip rolls. The two variable speeds drives for the
nip rolls and wind up rolls are controlled with scroll buttons on the
digital controllers, displaying the film speed in meters per minute.