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EXTRUSION: Processing Rigid PVC? Know Your Rheology
Before choosing and sizing extruders for running rigid vinyl, it is wise to bone up on the viscosity behavior of the material.
Columns Published: 7/28/2014
EXTRUSION: When Internal Screw Cooling Makes Sense
Internal screw cooling could help you solve solids-feeding and burning problems.
Columns Published: 6/19/2014
EXTRUSION: What’s the Right Feed Throat Temperature?
Selecting the proper one is critical to the process.
Columns Published: 5/21/2014
EXTRUSION: Effect of the Screw Flight On Melt Temperature, Energy Use
So-called rules of thumb regarding the design of flight clearance and width do not consider the temperature effect, both from the point of view of melt temperature and energy efficiency.
Columns Published: 4/23/2014
A Better Way to Balance Die Flow
Use temperature adjustments before making any mechanical tweaks.
Columns Published: 3/21/2014
Extruding High-Temperature Resins
Older extrusion lines might not be suitable for processing materials up to 750 F. Here's what you need to know to get started.
Columns Published: 2/25/2014
AC Drives Take Hold
With progress in electronics and the introduction of the flux vector drive using complex control algorithms, AC drives are now equal to or better than DC drives for most applications.
Columns Published: 1/23/2014