ICE BLASTING IN THE PLASTICS INDUSTRY
Molds are imperative!
of clean mold cavities for HDPE, PET, PEN,
PP, PU or molders of one
of the many other plastic product formulas is a major concern in
maintaining today's high quality standards. The build-up of unwanted
surface residues from either the product mix itself, mold releases
or the labeling process can create various problems, ranging from
product release ("knock out") to inferior product quality and possible
damage to tools from over-packing and straining. In
addition to maintaining the cleanliness of the molds, the Cold Jet
dry ice blasting process also reduces and in many cases eliminates
the need to disassemble the molds from the press as is needed for
associated with conventional cleaning methods
allow for mold cooling
removal (Unbolt, disconnect
and remove molds from press)
and transport of molds to blasting site
cleaning with grit blasting that
of molds for grit remaining in vents and for wear on
alignment and reconnection of the molds
of the molds to correct temperature
of trial samples to assure compliance with product
and reinstallation of molds can also cause mold cavity damage, resulting
in costly repairs and longer production downtime.
Effective Cold Jet Dry Ice Blast Cleaning
High Density Polyethylene bottle industry
By using the Cold Jet dry ice blasting process, HDPE
bottle mold cavities can now be cleaned in the wheel of the press.
All the hassles associated with mold removal are now eliminated.
Cold Jet dry ice blasting removes the waxy, paraffin build-up that
can lead to blemishes (orange peel effect) on the bottles while
the molds are hot and on-line. The use
of solvents is greatly reduced and the time spent grit blasting
is nearly eliminated. One
Customer saw an increase of three production days (at $5,000 worth
of bottle production per day) per line per year at his facility.
Eight lines were being cleaned and the extra 24 days of production
time resulted in an increased throughput of $120,000 worth of product.
Labor savings due to reduced clean up time were in excess of $20,000.
All this was accomplished using the Venturi Dry Ice Blasting System.
The revenue increase
represents a fourteen hundred percent return on investment to this
Cold Jet customer.
Polyurethane Molded Product for Automotive Applications
The manufacturing of a polyurethane foam product used in sound dampening
for autos and vans leaves the manufacturer with molds coated with
an isocyanate/wax mold release. Mold release build-up eventually
causes "knock out" problems, and, in extreme cases, the wax release
agent becomes encased in the polyurethane foam product, making the
product unusable. Due to the delicate nature of the molds, sand
blasting is undesirable as it abrades the entire mold cavity surface.
An alternative method of cleaning is hand scraping. However, scraping
is labor intensive and it requires some 5 to 6 cleaning hours per
mold. By using the Cold Jet dry ice blasting
system, molds are cleaned in only 15 to 20 minutes and the cavities
are more thoroughly cleaned. One particular customer
has 20 molds to clean and the entire job can now be completed in
5 to 6 hours. Bottom
line: twenty times as many molds are cleaned with dry ice blasting
versus conventional methods. Production up time is increased by
100 to 120 hours and maintenance crews are now free to attend to
Cold Jet has
a series of 45 and 90-degree micro nozzles,
which, combined with our Radial Feed Series dry ice blasting units
(Cold Jet AeRO 75-DX and Cold
Jet AeRO 75), clean entire blow and injection mold cavities
completely and effectively.
thorough on-line clean provided by the nozzles, which were specially
designed for the bottling industry, has virtually eliminated clouding
in PET bottle ribbings and the "orange peel" defects that occur
in HDPE bottles when molds are not free of residue.
the growing trend towards hot fill bottling, clearing pre-form tooling
quickly is becoming more critical",
says the plant engineer of North America's largest HDPE and PET
bottle manufacturers. The special PET compound used to withstand
the hot temperature fouls easily and molds must be cleaned daily.
Cold Jet dry ice
blasting is ideal because the molds can be blast cleaned hot and
in place, and the blasting units are portable and easy to use.
of the leading blow molding bottle manufacturers have discovered
that dry ice blasting systems cut their daily mold cleaning time
by about 80% simply by cleaning molds hot and in place. Today, even
the back 1/3 of the blow-mold surface and the entire deep-cavity
injection molds used to make test-tube shaped slugs are cleaned
by dry ice blasting whereas it used to have to be cleaned by hand.
Jetting is also a great solution for many of your general maintenance
- Clean conveyors
without damaging pneumatic devices, bearings or electrical equipment.
- Remove glue
and inkjet overspray from packaging equipment.
- Clean excess
grease and dust from machinery.
calculate your potential savings click
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And for more specific
and technical information see our technical