As the heart of any extrusion line, vacuum calibration tank
designs must be versatile and easy to operate. Many different
cross-sections, tank lengths and vacuum systems are required for this ever
changing industry. Along with our line of standard tank sizes and
configurations, our design team has provided many different custom
configurations. Whether you need a special cross-section, compartment
configuration, tank length or vacuum system, we understand your need for
flexibility and will happily accommodate your requests.
Whether custom or standard, we design our vacuum
calibration tanks with your operation in mind.
Die Face Adjustments
Die Face Adjustments
Die Face Adjustments
All MPM
vacuum sizing tanks come with all 3 planes of adjustment across the extruder
die face.
- The longitudinal movement, which allows the tank to
move to and from the extruder in a linear fashion to the extrusion line
is critical to proper die to calibration sleeve positioning. Our
adjustment provides a full 12" of travel as standard and uses a
mechanical linear drive screw with hand wheel that has positive
positioning and will not allow the tank to move after adjustment.
- The height adjustment, which positions the tank
centerline to the extruder centerline, uses individual mechanical screw
jack assemblies with hand wheels and provides a full 6" of up/down
travel. The upper tank is supported by heavy shaft and bearing
assemblies for maximum rigidity.
- The lateral, or commonly known as side to side
adjustment, allows the tank to be positioned horizontally across the die
face which helps eliminate any product drag on the sides of the
calibration sleeve. Our unique design has individual screw assemblies
with hand wheels driving UHMW polyethylene slide assemblies under the tank body.
* optional
motorized longitudinal movement on floor track assembly is available *
Vacuum Systems
Vacuum Systems
Vacuum Systems
Three typical vacuum systems are available in
today's vacuum calibration tank designs. Each one of these systems have
there strengths and weaknesses and should be chosen based on your particular
needs.
-
Eductor Vacuum (venturi) is a vacuum
system that has been around for a long time and is mainly used on small
diameter, thin wall tubing and some small profiles. The system uses a
centrifugal pump that delivers pressurized water through a venturi
eductor mounted under the compartment stand pipe. This stream of water
passing through the venturi creates a vacuum that draws air and excess
water from the upper chamber. While usually adequate for non-critical
sizing, this system is not recommended when tight tolerance sizing is
required.
-
Direct Vacuum (liquid ring) systems are
designed for heavy wall tubing or pipe and larger profiles. A direct
vacuum system pulls air and water directly through a vacuum pump from the
compartment stand pipe and discharges this water to drain.
-
Centrifugal Blower
(closed loop) vacuum
systems are designed for tighter tolerance sizing. The system consists
of a centrifugal blower operating in reverse which draws vacuum on a
hermetically sealed reservoir usually mounted below the upper tank. A
line from the reservoir is connected to the upper tank where air and
excess water are pulled into the reservoir. Because the air and water
never have to go through the pump or an eductor and are not subject to
the associated turbulence, the vacuum level is much more stable and
tighter tolerances are achieved.
MPM
offers all three of these type systems and can easily adapt any one of them
to our tank designs.
High Temperature Vacuum Tank
Just give us a call or e-mail us at
sales@michiganplastics.com with
your requirements. We will be happy to provide a detailed quote based on
your specific needs.
