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When processing multi-component materials, homogenous mixing of the components becomes extremely important.
Wide differences in media viscosity, short pot life, components which are difficult to mix etc., require different mixing systems.
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“MIXING HEADS”
The quality of a product foamed, moulded or sprayed with polyurethane, highly depends on the ability to obtain an efficient dosing and a homogeneous component mixing, granting a perfect laminar flow. For these main reasons, the mixing head is doubtless the real technological core of a dosing unit, a system or a complete plant for polyurethane processing.
Cannon offers the widest range of high and low pressure mixing heads suitable to process the great variety of chemical formulations (rigid and flexible foams, compact materials, filled or reinforced, semi-rigid), designed to meet the specific requirements of dedicated applications (thermal and acoustic insulation, seating, structural parts, RRIM, flexible and rigid blocks), able to cover all the main industrial production processes (open mould pouring, foaming, injection and spraying).
· Multi-component mixing heads
· Heads for filled materials reinforced with glass fibres
· Heads for micro-shots or very high outputs
· Spray heads for compact and filled materials
From minimum 0,20 g/sec up to 10.000 g/sec for highly reactive materials.
Cannon’s creative and constructive ability is shown by the great success based on more than 350 patents and innovative technological solutions that have influenced and sometimes revolutionized whole industrial sectors.
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Materials remain separate until injected into static mixer.
The patented Graco PD44 Valve features balanced inlet/outlet spool assemblies that do not displace
material while shifting from the reload to the dispense position. This allows pressure feeding of the
"A" and "B" components up to 1200 psi during reloading while isolating the materials from the mixer
inlet. Upon shifting to the dispense position, an accurate volume of "A" and "B" components
is injected into the disposable mixer inlet by rod displacement metering technology
Reload
Spools shift to the right
- Material feed inlets are opened
- Materials are transferred into the metering chambers
by a pressurized feed system
- Outlet ports are blocked
- Metering rods are retracted to a precise position determining
the volume of each material
Shift
The balanced spool assemblies shift to the dispense position
- Material path to the mixer inlet is opened
- Material feed inlet ports are blocked
- Metering rods remain in the retracted position
Dispense
Metering rods drive down
- A and B materials are simultaneously dispensed from the metering
chamber into the disposable mixer
- A and B materials are dispensed at the predetermined volume ratio.
Upon completion of the dispense stroke, the metering rod
and spool assemblies shift back to the reload position
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Mixing heads (liquids, resins)
