position the reinforcements for subsequent feeding
into the guides. The reinforcement must be located
properly within the composite and controlled
by the reinforcement guides.
The resin impregnator
saturates (wets out) the reinforcement with
a solution containing the resin, fillers, pigment,
and catalyst plus any other additives required.
The interior of the resin impregnator is carefully
designed to optimize the "wet-out"
(complete saturation) of the reinforcements.
On exiting the
resin impregnator, the reinforcements are organized
and positioned for the eventual placement within
the cross section form by the preformer. The
preformer is an array of tooling which squeezes
away excess resin as the product is moving forward
and gently shapes the materials prior to entering
the die. In the die the thermosetting reaction
is heat activated (energy is primarily supplied
electrically) and the composite is cured (hardened).
On exiting the
die, the cured profile is pulled to the saw
for cutting to length. It is necessary to cool
the hot part before it is gripped by the pull
block (made of durable urethane foam) to prevent
cracking and/or deformation by the pull blocks.
Two distinct pulling systems are used: a caterpillar
counter-rotating type and a hand-over-hand reciprocating
In certain applications
an RF (radio frequency wave generator) unit
is used to preheat the composite before entering
the die. When in use, the RF heater is positioned
between the resin impregnator and the preformer.
RF is generally only used with an all roving
J & J Mechanic
and its manufacturing partners in
China can manufacture customized
fiberglass products with state-of-the-art
manufacturing equipments, highly
skilled engineers and technical
workers. Please visit our Pultruded-FRP
for more details
of what we are manufacturing and
their application fields.
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