Monday,
July 3, 2006
Article from Job Shop Technology Magazine
"Injection Molding Delivers Lighter, Lower-Cost Parts for Aircraft"
Hi-Tech Mold & Tool, a custom injection molder based in Pittsfield,
Mass., recently announced that it will supply high-strength, engineered
plastic injection-molded valves to Hamilton Sundstrand for the Boeing
787 Dreamliner. Certified to ISO 9001:2000 and AS9100 standards, Hi-Tech
Mold & Tool employs net-shape molding and secondary machining to achieve
stringent dimensional and surface finish requirements. Parts manufactured
by the company include plastic components and assemblies for air-handling
systems in large commercial and regional jets, as well as military fighters.
"Most of what we
do are valves or valve components," says Dave Pellegrino, Hi-Tech's
engineering and tool room manager. The company also molds components
such as water collectors, which Pellegrino describes as a "static type"
of product that takes in wet air and expels dry air.
The Hamilton Sundstrand
award is the largest aerospace contract ever awarded to Hi-Tech, which
estimates the value of the work at $11 million over the duration of
the program. For each aircraft, Hi-Tech will build and deliver approximately
18 different valves that are essential to operating "one of the most
sophisticated environmental control systems on a commercial airline,"
according to the company.
"This contract helps
Hi-Tech's products to gain a foothold in the commercial aircraft sector,
which is always looking for new ways to remove weight from aircraft,"
said William Kristensen, president, in a statement announcing the award.
"Our high strength is working with engineered plastic resin products
to provide a lightweight solution to the biggest new commercial aircraft
program the industry is likely to see for some time to come."
In competing with
other companies from around the world to secure the award, Hi-Tech scored
points for using new engineered resins to reduce weight, as well as
the cost to build and maintain the product. The materials that will
be used to mold the valves are described by Pellegrino as "high-strength,
high-temperature, chemical-resistant thermoplastics."
Hi-Tech has developed
a reputation for using highly-engineered, carbon- and glass fiber-reinforced
resins, such as polyetherketone (PEK), polyetherimide (PEI), and polyphenylenesulfide
(PPS), to mold strong, lightweight parts that combine static dissipation
with resistance to high heat and corrosion. The company's engineering
and design team has worked extensively with customers' complex product
designs to "ensure the best design for manufacturability," according
to Ann Fyfe, who handles sales, marketing, and customer care.
"Most of the products
that we've done are metal-to-plastic replacements," says Fyfe. "Working
closely with the customer and resin supplier, we achieve quality parts
with weight reduction and lower costs. Hi-Tech is a full-service supplier,
so we take projects from design to final assembly, all here at our facility."
As JST went
to press, Hi-Tech's work on the Dreamliner program was well under way.
"We've already built a number of molds for the program," said Pellegrino.
"From a tooling standpoint, we're about 25% [complete]. Tooling for
the entire program is projected to be completed by Q1 '07. Some of the
molded products are currently going through first-article inspection,
and we're going to be doing the first batch of assemblies in about a
month."
For aerospace/defense
applications, Hi-Tech typically competes with firms that manufacture
die castings, or steel and aluminum castings. Because Hi-Tech's manufacturing
processes are new to these markets, it's often necessary to educate
potential customers about the benefits of injection-molding lighter,
lower-cost plastic parts for these applications. But by fully discussing
the advantages and potential limiting factors of using injection-molded
engineering plastics, customers may find that the limiting factors are
not so limiting after all.
"A plastic component
is not going to withstand the same types of temperatures and pressures
that a metal component will, but typically, it's not necessary," says
Pellegrino. "Also, extremely tight tolerances may not be achieved without
machining. Hi-Tech works with its customers to create a very near net
shape, and will then machine the part to tolerance."
As it looks to expand
its share of the aerospace/defense market, Hi-Tech sees the Hamilton
Sundstrand contract as a significant turning point, says Kristensen.
It's an opportunity, he says, "to develop as a center of excellence
for a completely new product range, possibly leading to additional business
on other major commercial and military aircraft programs."
The company provides
custom molded parts to numerous industries besides aerospace/defense,
including the medical, general industrial, telecommunications, and electronics
segments. Hi-Tech also makes parts for the recreational, food service,
and automotive industries. The firm has presses ranging from 20 to 500
tons in clamp force, a class 100,000 clean room for medical manufacturing,
and a full secondary operations department for machining, assembly,
flow and pressure testing, decorating, insulating, painting/coating,
and finishing..