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– A type of extrusion whose only source of heat is the conversion of the
drive energy through the viscous resistance of the plastics mass in the
extruder.
–
The resistivity of molten plastic material to forward flow.
– The
part of the extruder encasing the screw or plunger.
–
The sleeve forming the inner surface of the barrel.
–
The process of pressing or smoothing material between rollers.
–
Sometimes referred to as “sidings,” it is extruded PVC-U boards that are
used as outdoor weather-resistant façade panels.
– Any
plastic material prepared for subsequent manufacturing processes,
specifically extrusion, molding or calendering.
– The transition section of a screw channel in which a reduction in the
screw channel volume occurs.
– A
tank typically containing water through which extrusion is constantly
passed for cooling.
– The
technique of cross-linking a plastics material.
– The section of a two-stage extruder in which an increase in screw
channel volume occurs.
– The
component on a plastics extruder affixed to the extruder head through
which the melt is pushed to form the desired profile.
– In
moulds, the main support for the punch or mould cavity.
– A
free flowing blend of compound or resin and other ingredients as
prepared for an additional manufacturing operation specifically for
extrusion or molding.
– The
product or result of an extrusion process. An extrudate is a product or
material forced through a shaping orifice as a continuous body.
–
The minimal inner diameter of the extruder barrel
– A coating technique in which molten plastic feeds directly from an
extruder die into a nip-roll assembly combined with the substrate.
– Also
called a “caterpillar,” it is an apparatus used for the continual
removal of extrudate from the die.
– The
unique process of aging a thermoplastic or thermoset product and
examining the percentage of retained physical and chemical properties
after exposure to heat for a prolonged period of time.
– Any
extrusion material heated to a plastic condition.
–
A term that refers to the strength of molten plastic.
–
The element of tubing tie that shapes the outer surface of a tube.
– Resins
or mixtures of resins with compounding additives in the shape of
similar-sized tablets and granules that have been extruded or chopped
into short segments to prepare them for molding operations.
– A
barrel with a temperature control, wherein a plunger pushes material in
a melted state to the die.
– Any of
several physically similar polymerized synthetics or chemically altered
natural resins, such as thermoplastic materials (polyvinyl, polystyrene,
polyethylene) or thermosetting materials (polyesters, epoxies, silicones
used with fillers, stabilizers, pigments).
– A
helically grooved rotating element inside the barrel of a screw
extruder. The main purpose of a screw is to melt and feed raw material
from the feeder to the die, but it also homogenizes, compresses and
pressurizes the material.
–
A machine comprised of a barrel with a temperature control. It houses
one or more rotating screws, which pass plastic materials from the feed
aperture and move them in the form of melt under pressure through a die.
– An
apparatus for reeling extruded material.
– A
term that refers to the family of materials that can be melted only once
during the original processing and cannot be reprocessed after the
original part is made.
–
Any material, such as polyethylene, Santoprene and ABS, which can be
remelted and reprocessed without considerable loss of properties or
scrap loss.
– An
apparatus at the discharge stage of the screw for finishing homogenizing
and blending of the melt.
– An
extruded PVC-U channel used to contain and protect pipes or cables.
–
A procedure utilizing a sizing die with a vacuum applied to the outer
surface of the extrudate.
– A
generic term for PVC, it is one of various compounds of ethylene that
are polymerized to form resins and plastics (e.g. polyvinyl or
polyethylene plastics). |
Molding
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