Patent EP-0747204-A3 (EP)
Inventor: KUSIBAB ZBIGNIEW
IPC: B29C70/52
Filed: 1996-06-07
Abstract: The present invention pertains to a system for producing
a pultruded part (12) having a cross-sectional shape with a non-linear
portion. The system (10) comprises a mechanism (14) for pultruding
reinforcement, such as rovings (16), mat, veil, and mineral or glass
fibers, but not limited thereto. The system comprises a mechanism
for injecting resin mixture (20) into reinforcement. The injecting
mechanism (18) comprises a chamber (22)
through which the reinforcement is
pulled by the pultrusion mechanism (14). The chamber (22) has an entrance
opening (21) in communication with the chamber through which
reinforcement enters the chamber and an exit opening (26) in
communication with the chamber through which reinforcement exits
the chamber, the entrance opening having a shape with a non-linear
portion (17) that conforms with the reinforcement cross section. The
chamber has a tapered portion (28) with a taper less than or equal to
1.5° which accents the impregnation of reinforcement with resin
mixture and increases resin mixture pressure as the tapered portion
narrows. The tapered portion is wider near the entrance opening
than the exit opening. The injection mechanism (18) comprises a resin
mixture distribution network (30) in communication with the chamber (22)
through which resin mixture (20) is introduced into the chamber. The
injection mechanism is disposed adjacent to and in engagement with
the pultruding mechanism (14) so the pultrusion mechanism can pull the
reinforcement through the chamber. Additionally, the system
comprises a mechanism (42) for providing reinforcement formed into a
desired cross section having a shape with a non-linear portion to
the chamber through the entrance opening. The providing mechanism (32)
is disposed adjacent to and in engagement with the injection
mechanism (18) so reinforcement from the providing mechanism can enter
the entrance opening of the injection mechanism. The system
comprises a mechanism (44) for making the resin mixture (20)
that has been
combined with reinforcement (16) in the injection mechanism (18) into a
ladder part (12). The making mechanism (34)
is disposed adjacent to and in
engagement with the injecting mechanism (18) to receive reinforcement
with resin mixture from the injecting mechanism and disposed
adjacent to and in engagement with the pultruding mechanism (14) so the
reinforcement can be pulled through the making mechanism (34) by the
pultruding mechanism. The present invention pertains to a system
for producing a pultruded part having structural integrity. The
present invention pertains to the injecting mechanism. The present
invention pertains to a first carding plate (42). The first carding
plate for controlling placement of reinforcement for resin mixture
injection comprises a plate having a series of holes (44) which do not
overlap and carding slots (116) through which rovings and mat,
respectively, extend. The pre-wet assembly (50) preferably comprises a
pre-wet housing (98) having a pre-wet chamber (99)
into which resin mixture
is introduced. The pre-wet housing also has a slot (100) through which
reinforcement passes. The slot is connected to the pre-wet chamber
so resin mixture in the pre-wet chamber can contact reinforcement
in the slot. The slot has a slot
entrance (102) and a slot exit (104) through
which the reinforcement enters and exits the slot, respectively.
The present invention pertains to a method for producing pultruded
parts.