Why Do Plastic Parts
The primary mode, or cause, of failure
for plastic parts can be directly attributed to one or more
of the following, including Material, Design, Process, and/or
Additionally, we classify the method,
or type, of failure(s) as Mechanical, Thermal, Chemical,
and/or Environmental. This intention of our plastic expert's
work is to establish the most probable cause for failure
of the Weight Adjust Lever, by identifying the Mode, or
“Why”, and the Method, or “How”, for the same.
After a comprehensive Visual and Stereo-Microscopic
examination, our plastic experts can commission material
and mechanical testing and analysis, in accordance with
applicable Industry and ASTM Test Methods, CPC's plastic
experts can provide your client with an expert opinion based
on our findings coupled with our in-depth plastic industry
knowledge and expertise with similar designs, applications,
and plastic resins.
CPC's Plastic Experts have worked for
a number of Global Plastic Machinery Manufacturers in an
engineering capacity, proving machine installation, process
development, process troubleshooting, machine troubleshooting,
machine repair, machine control programming, machine robotics
and automation, and training for both in-house and client
In addition to our work directly for
the plastic machinery manufacturers, CPC's plastic experts
have decades of hands-on work with all types of plastic
manufacturing machinery, from vertical to horizontal, injection
thru extrusion, and liquid to metal injection processes,
we truly have the experience and knowledge of working on
a vast array of plastics machinery. In fact, our plastic
experts have worked on the smallest and largest plastic
machines in the world and CPC Plastics, Inc. maintains a
plastic manufacturing facility in West Warwick, RI to support
our clients needs.
Having an intimate understanding of
plastic manufacturing machinery and CPC's plastic experts
work everyday on troubleshooting manufacturing processes
for a wide variety of plastic products and work directly
with our clients to improve the same. From Design of Experiments
(DOE), Quality Control (QC), Testing and Analysis, to Machine
Procurement, CPC Plastic has the scope of knowledge and
experience that you would expect from a plastic expert.
Often times litigation surrounding plastic
product design, manufacturing, machinery, quality control,
testing, mold construction, etc. calls into attention and/or
questions ones conformity to Plastic Industry Standards
and Practices as it pertains to the case at hand. CPC's
plastic experts have extensive experience in identifying
applicable standards and practices, using our comprehensive
library and references coupled with our in-depth plastic
Furthermore, CPC's plastic experts are
highly experienced with and work everyday to provide our
clients with ASTM, ISO, SPI, ANSI, MilSpec and other applicable
Plastic Industry Standards that apply to their specific
needs and fall within the scope of the project.
As a primary mode of plastic failure,
product design standards and practices are in place and
have been developed based on years of testing and analysis
data associated with wide array of product applications
and plastic resins. Often times, product design engineers
are not familiar with plastics and the unique differences
that must be accounted for in the design between plastic
and steel, aluminum, and other metals products and assemblies.
Most often unknowing design engineers
will leave sharp corners, which tend to localize stress
and cause cracking and leading to failure on plastic parts,
are not of any significant concern to most metal applications.
Another common mistake made by product design engineers
is to not allow for sufficient wall-thickness, which is
predicated by the material being used and the [mechanical]
loads being applied, only to realize that the part was not
strong enough for the job it was intended.
Other common pitfalls include neglecting
to conduct proper testing and analysis on a product design,
using the specified materials, and in full view of the intended
manufacturing process. Finite Element Analysis or FEA is
a method and process of analyzing and solving complex elasticity
and structural design problems, allowing the designer to
strengthen the part by discovering weaknesses, while also
allow for reducing weight, materials, cost, etc. In fact,
there are many items on the design checklist to address
before a product designer has fulfilled his or her duties,
thereby increasing the potential for failure.
CPC's plastic experts are highly experienced
with and work everyday to provide our clients with ASTM,
ISO, SPI, ANSI, MilSpec and other applicable Plastic Industry
Standards that apply to their specific needs and fall within
the scope of the project
CPC's plastic experts day to day work
includes either recommending, testing, or researching applicable
ASTM Test Methods and Techniques required by our clients
in the manufacture of plastic products and assemblies. The
American Society for Testing and Materials (ASTM) was originally
formed over a century ago to address frequent rail
breaks in the railroad industry. Today, ASTM works to develop
Standards for Testing and Materials needs to support a global
Additionally, CPC Plastics experts daily
work includes specifying plastic materials and making recommendations
based material test data obtained thru studies commissioned
by CPC, and applicable test data obtained thru studies conducted
by educational and research facilities engaged in the same.
Furthermore, thru our extensive work with Plastic Failure
Analysis, a significant amount of material testing and research
is performed on a regular basis.
CPC's plastic experts are highly experienced
with and work to provide our clients with ASTM, ISO, SPI,
ANSI, MilSpec and other applicable Plastic Industry Standards
that apply to their specific needs and fall within the scope
of the project.
Plastic injection molding safety standards
are defined and enforced by the Occupational Safety and
Health Administration, herein OSHA (www.osha.gov), the American
National Standards Institute, herein ANSI (www.ansi.org)
and approved State Occupational Safety and Health Plans,
such as Michigan’s OSHP.
Plastic manufacturing employers must
conform to OSHA’s general industry standard 29 CFR 1919
, which applies to the major percentage of plastics processors
operating under SIC code 3089.
ANSI, a private non-profit organization
(501(c)3) administers and coordinates the U.S. voluntary
standardization and conformity assessment system . As with
most industries, organizations such as ANSI have developed
standards primarily through relationships with the injection
molding machinery manufacturers.
The ten (10) most frequently cited standards
for plastic injection molders*
1910.147 The control of hazardous energy (lockout/tagout)
1910.212 General requirements for all machines
1910.1200 Hazard Communication
1910.305 Electrical, Wiring Methods, Components, and Equipment
1910.134 Respiratory Protection.
1910.178 Powered Industrial Trucks
1910.303 Electrical Systems Design, General Requirements
1910.219 Mechanical Power-Transmission Apparatus
1910.215 Abrasive Wheel Machinery
1910.95 Occupational Noise Exposure
the period of 10.02 through 09.02
Total Plastics Consulting
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