The SRUGO SIGMA KNEADER which is also known as the
Double 'Z' Arm Kneader, is used for the mixing-kneading of materials
with very high viscosities (over 500,000 cps).
The SRUGO SIGMA KNEADER is used in the
chemical, food, sealing compound and paint industries, among others.
On these machines the mixing arms rotate at different speeds (usually in the
ratio of 3 to 2) in two semi-cylinders, the intersection of which forms a
saddle piece and meeting tangentially just above the saddle.
The mixing action is a combination of bulk movement, smearing, stretching,
folding, dividing, and recombining as the material is pulled and squeezed
against blades, saddle, and side walls. Continually new layers of material
are compressed and folded over one another and are subjected to shearing
forces. New surfaces are formed and the components can penetrate.
The blades, which are ground and polished, successively sweep all points of
the trough surface during each revolution, at the same time dividing the
batch continuously across the saddle piece and thereby rapidly effecting a
perfectly homogeneous mix.
SPECIAL "DUPLEX" KNEADING MACHINE
SRUGO SIGMA Mixing Kneading Machines are twin
basin kneading machines with
two horizontally arranged kneading blades, which are deeply geared into one
another and strip themselves reciprocally. The kneading blades are
turning acc. to a ratio 1:2. Because of their different speeds, the blade
sides approach and withdraw alternately. This causes high
pressure tensile and shearing rates and therefore heavy friction in the
kneading medium, which creates excellent dispersing and homogeneity.
The shape of the kneading blades enables a steady flow of material from the
side walls of the kneading trough to the middle of the kneading trough.
DISCHARGING ARRANGEMENT OF MIXERS
a)tilting tank. For small machines tilt can be of a mechanical type
(handlever or handwheel). For greater machines electromechanically or
hydraulically powered. b)extrusion screw. The extrusion-discharge screw is
located in the saddle section and runs in a cylindrical trough tangential to,
and below the 2 mixing blades. During the mixing cycle the screw moves the
material within the reach of the mixing blades, thus assuring a thorough
blending of all the ingredients, and, at the same time, accelerationg the
mixing process. At discharge time, the direction of rotation of the screw is
reversed and the mixed material is extruded through suitable die openings in
the side of the machine. The extrusion screw has its own separate drive so that
screw operate independently.
The large number of options available for the
SRUGO SIGMA KNEADER enable it to
perform particular functions or operate as a general kneader. Some of
the options include:
Standard sizes of
SRUGO SIGMA KNEADERS range
from 3 to 3000 liters with larger units available.
- tiltable tank
- bottom extruder discharge
- variable speed drive
- special 'Duplex' kneading arms for intensive kneading
- double jacket
- overlapping arms
- double jacket and
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additional SIGMA models
Click here for the SIGMA Specification Information
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