This
Long Bi-lobed Conveying Element is a short
lead element with SerratedSpline keyway.
The serrated splined shaft has a straight
sided spline geometry with an included angle.
An included angle of 60 degrees is used
by WP. Other manufacturers using straight
side splines with other included angles
are Maris and Freesia Macros.
Element
with Involute Splined Keyway
This
Short Bi-lobed Normal Conveying Element
is a long lead element with involute splines.
Shafts with involute spline geometry are
now popular now with many manufacturers
including APV, Toshiba and DGP Windsor
Element
with Double Hexagonal Keyway
This
Short Bi-lobed Normal Conveying Element
with long lead has a double hexagonal keyway.
Although the shaft is a single hexagonal
shaft, the double hexagonal keyway allows
for the same element to be used on both
shafts. The double hexagonal keyway in Kneading
blocks also allows for greater flexibility
in achieving different orientation between
elements. The hexagonal shaft design is
typically found in older machines manufactured
by APV, Toshiba and
Element
with a Single Keyway
This
Long Bi-lobed Normal Conveying Element is
a regular lead element with a single keyway.
A cylindrical shaft with a single key-way
was the design for the very first twin-screw
extruder. The established manufacturers
of twin-screw extruders such as Ikegai,
Toshiba, JSW, WP have older generation machines
with the Single Key-way design.
Element
with Semicircular Keyway
This
Regular Bi-lobed Undercut Conveying Element
is a regular lead element with semicircular
keyway. Popular in older generation Berstorff
machines, the cylindrical shafts are provided
with rods as keys. The number of keyways
in the element may be two or four.
Element
with Straight Side Spline
This
Seven Segment Bi-lobed Right Handed Kneading
Block has a Six Sided Straight Splined keyway.
The Six Splined shaft was popular in the
earlier generation of machines prior to
the introduction of involute spline and
serrated spline shafts.
