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Rebling Plastics has vast experience in plastic
injection molding the many different grades of
ABS plasic available today including high-impact,
glass-filled, transparent and high luster formulations.
We have molded ABS plastic components in a wide
range of colors for applications that include
office machines, electronics and consumer related
products.
Properties of ABS plastic
ABS is an amorphous thermoplastic copolymer blended
from Acrylonitrile, Butadiene and Styrene.
Being an amorphous thermoplastic, it is easily
plastic injection molded, and it provides uniform
shrinkage in both the flow and transverse-to-flow
directions, enabling Rebling Plastics to accurately
predict mold shrinkage from the outset.
This uniformity in shrinkage can be maintained
over a wide processing range so precise dimensional
control is easier to achieve when compared to
a crystalline thermoplastic. Uniformity
in shrinkage also results in minimal warpage after
plastic injection molding.
Secondary Operations
for ABS plastic parts
Rebling Plastics can supply ABS plastic injection
molding components that require post molding operations
such as: ultrasonic
welding to form an assembly; secondary machining
operations; installation of metal inserts via
ultrasonic insertion; and decorated
moldings using hot stamping, pad printing,
and laser marking processes. A unique characteristic
of ABS is the ability to chrome plate the material,
thus lending itself to applications such as decorative
trim, automotive parts, medical devices and toys.
ABS plastic injection
molding design
Rebling Plastics design
engineers have extensive experience in optimizing
ABS plastic part designs for functionality, cosmetics,
cost and processing. Since plastic injection
molding of ABS readily shows evidence of sink
marks, maintaining uniform wall thickness throughout
the part is essential in producing an aesthetically
pleasing molding. Ribs and gussets should
be used to core out thick sections. The
rib thickness should not exceed 50% of the intersecting
wall thickness. Bosses incorporated in the
design can also result in sink marks if not properly
designed. Sharp corners result in stress
concentrations and should be avoided. To
minimize and eliminate these issues, Rebling Plastics
engineering staff should be consulted
prior to issuing a final design. This design
assistance is provided free of charge.
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