Besides three-dimensional (3D) computational fluid dynamic (CFD) calculations (a challenge to set up, run and review results so as to adjust dies), the profile die
module (PDM) of the VEL offers a design tool that is quick and simple to use for profile die
design, in particular.
Assuming the original internal geometry of the profile die
was properly designed to produce the desired shape with 2 MI LDPE, what would it look like with a 5 MFI PP homopolymer or a 0.76 IV PET?
of Williamsville, N.Y., introduces software called Profile Digitizer that allows quick and easy profile die
development with the aid of a mobile phone camera.
The use of a developed flow assumption on die cross sections is well established in work on profile die
During the coextrusion process, melts of the same or different plastics are combined before they exit the profile die
, hardening to a compound in the calender.
Ausen, Seth, and Venne have developed a method for coextruding an initial melt stream through a profile die
with a die insert.
The effect of rheological change caused by the filler content on the flow balance of an uneven thickness, U-shaped profile die
was experimentally investigated.
The Alpha series can also be supplied as part of a turnkey line with a customised profile die
and the Alpha protech downstream unit which includes a 6 m calibration table, a belt or caterpillar haul-off for line speeds of up to 20 m/min, a cut-off assembly and a tilting device all controlled by a PLC with six languages that can be adjusted to customer-specific requirements and operated through a 6 inch touch display screen.
RW+ Besides three-dimensional computational fluid dynamic (CFD) calculations (a challenge to set-up and run, and review results so as to adjust dies), the "Profile Die
Module" of the VEL offers a design tool that is quick and simple to use for profile die
design in particular.
The first is minimizing shear heating of the extrudate to limit the melt temperature--known as "internal lubrication." The second funcdon is to overcome the no-slip boundary condition on the surfaces of the profile die
so that the profile has a smooth "skin"--known as "external" lubrication.
The accompanying figures below show the interface shape (shown in blue color), velocity, and pressure distributions in a complex profile die
predicted by the polyXtrue coextrusion die design module.