| Vacuum Casting Machines for the Jewellery Industry.
J5, J10 and J15 - Resistance Vacuum Casting Machines and Grainer Design Philosophy To accommodate the needs of jewelry manufacturers around the world,
the founders of Neutec/USA put together a team of highly-skilled
production jewelers and engineers to design and perfect the J-series
induction casting machines. The machines are designed to cut operation
time so that casters can be casters, not computer programmers.
After years of research and testing, Neutec presents machines
that let you perform quality casting more efficiently, saving
you time and money while increasing your productivity. Insure Your Casting Operation Neutec machines are built using the best available parts and technology.
Our engineers combined their extensive background in fail-safe,
high technology with the current needs of jewelry manufacturers.
Naturally, the first question to ask about any new investment is, "How is this investment going to perform for me?" If you need lower operating expenses, exceptional quality, higher production, and ease of operation in your casting department, then you should consider the Neutec induction casting machines. These precision-engineered, self-programming, high-production induction casting systems will maximize your productivity while minimizing your casting rejects. The Neutec induction machines feature the most advanced, best-built systems in the world, designed for today's global market with revolutionary benefits like:
Lower Training Costs and Increased Production Stability The Advanced Dynamic Computer (ADC) technology that Neutec uses
in its induction machines is what enables these machines to create
such fast, precise, Reduce Waste and Increase Productivity It's not uncommon for companies to produce 10 to 20% over their
orders to make sure they can deliver finished product in the required
time frame. Some of this overproduction is used up in casting
rejects. The large melt and flask capacity of the machines reduces the
scrap-to-part ratios caused by using smaller flasks. Because of
the precise control of Neutec induction casting machines, you
can take full advantage of the ample 150mm x 250mm (6" x 10")
flask capacity combined with the 3-kilo melting crucible. By casting
more parts per flask, you can reduce the number of flasks per
day and cast faster, or increase your casting production in the
same amount of time. You can have less metal in your inventory
due to fewer buttons and sprues per parts cast. Combine this advantage
with the reduced cycle time of 2 1/2 to 3 minutes flask to flask,
and you can additionally speed production and use your valuable
work force to further enhance your total quality production system. Cost-Reduced Specialty Casting with ADC Control
Neutec's Intelligent Pressure System (IPS) is far superior to
the old pressure-over-vacuum (POV) systems found in all other
casting machines. POV systems are operator-programmed to start
the pressure at a fixed interval based on the beginning of the
pour. A large volume must then be filled with pressurized gas--that
can take as long as 2-3 seconds. Neutec's exclusive IPS system
uses an optical sensor to start pressure at the exact end of the
pour. The pressure is triggered in a few milliseconds and effective
pressurization is very rapid because only the small space between
the bottom of the crucible and the top of the flask is pressurized.
Because jewelry castings solidify quickly, pressure must start
at the exact end of the pour and be completed in a very short
time. Our research shows that POV systems are inconsistent; they
are usually too slow or occasionally too fast to be effective.
Pressurizing before completion of the pour causes expensive casting
defects as reported in Gold Technology, July 1994. Such defects
can't happen in J-10b and J-15 casting machines. Money Savings With Proper Karating With the Neutec induction machines' exclusive Pulsed Power Stirring
and Power Stir Programming, you can ensure alloy homogeneity and
save a considerable amount of money at the same time. Reduced Oxidation and Reject Rates
Capacities* of J-series Induction Casters
*Many manufacturers base their casting capacity figures on the
total (liquid) capacity of the crucible. This can be misleading
because casting grain is not a liquid. The chart above will help
you compare the difference between liquid and working capacities.
A crucible filled to capacity with casting grain holds considerably
less than a crucible full of molten metal. We believe a realistic
working capacity is 60% of the total capacity. When you are comparing
casting equipment, make sure you know if the capacity being quoted
is total capacity or working capacity, and of what metal. The
difference can be significant. Neutec is proud to announce its newest addition to the J-series: the J-5. This machine has the same technologically advanced features as Neutec J-15 and J-10b machines, but it's been modified to fit the budget and casting requirements of a smaller casting shop! Look for more information about this new induction casting machine coming soon to this site. ENQUIRIES: Please complete our on line enquiry form: You are welcome to e-mail us on chris@hewitt-impex.co.uk and we will be pleased to pass on your enquiry to our nearest distributor.
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The results are the most dependable, consistent, easy-to-operate
casting machines in the world today. You can depend on Neutec
for readily available technical support and supply availability--virtually
anywhere in the world. You are making some important decisions
right now--make sure you know the facts. 
repeatable quality with little operator effort. The ADC system
self-programs and operates using real-time dynamic variables--such
as alloy type, amount of metal loaded into the melting crucible,
and accurate temperature control--to quickly produce superior
quality castings. Because the system makes these operations transparent
to the operator, the caster is free to produce castings rather
than do programming. With the ADC system, operator training and
cross-training are much easier and faster, allowing a greater
depth of trained personnel and lower risk of production down-time.
It is also true that when sub-standard pieces get further down
the production line before they are detected, costs climb quickly
because of lost labor due to rework of defects. The Neutec induction
casting machines can help to eliminate the difficulties in your
casting process. No casting machine will eliminate all of your
production challenges, since many problems can be inherent in
the design of the jewelry piece. What the Neutec induction casting
machines will do is run consistently in a wide variety of manufacturing
environments, produce almost double what many induction casting
machines can, and accurately cast many models that are problematic
in other machines. Because these machines monitor themselves,
they will provide you with accurate and complete information of
your casting operation, and the means to optimize its performance.
Specialty cost-reduction casting, such as Stone-In-Wax casting,
become much simpler when monitored and controlled by the ADC.
All quality casting requires precision temperature control. Neutec
ADC technology overcomes the problem of considerable lag time
inherent in process-controlled computers (PCC). This lag time
occurs between the actual metal temperature and the reported temperature,
due to the rate of heat transfer from the metal through the sealing
rod, thermocouple shield, thermocouple, and finally to the process
controller. Neutec induction casting machines have histograms
imbedded in the ADC computer that report metal temperature within
3 degrees of actual, unlike the variance of as much as 50-100°C
in other casting machines. Whether it is using the Type K thermocouple
or the high-temperature Type S thermocouple (used to get perfect
results from palladium white golds and alloys), the ADC reports
accurate temperatures every time.
Stirring with induction is power dependent. In other casting
machines, the power is greatly reduced or shut off completely
when the preset metal temperature goal is reached. Little or no
stirring takes place at that time, and it can be several seconds
if not minutes before the metal is finally released into the flask.
During this time, the heavier components settle and drop first
in bottom-pour crucibles and slide out from underneath the melt
in centrifugal machines; thus the need for overkarating. The top
of the tree then has too much fine gold and the bottom of the
tree has just enough to pass an assay. A factory casting 1000
pieces per day, 52 weeks a year, with an average weight of 3 grams
alloying to .586 at $400 U.S. gold, will give away over $30,000
U.S. that year just in excess gold cost. Power Stirring occurs
right up to the cast event, ensuring homogeneity from the bottom
of the tree to the top, thereby eliminating the need for overkarating.
Casting grain of poor or inconsistent quality makes it virtually
impossible for you to produce top-quality castings. Our Alloying/Graining
option in conjunction with our casting system protects your metal
from oxide formation. 
Neutec induction casting machines eliminate oxygen from the system
and protect the metal, using both graphite crucibles to scavenge
residual oxygen and an inert gas atmosphere to protect the molten
metal from oxygen exposure throughout the entire process. Most
casters regrain their sprues and buttons for reuse to clean up
their metal and minimize refining charges. In theory, this saves
money, but if your scrap metal is being regrained in an open-system
(exposed to oxygen) furnace, copper oxide and other oxidized impurities
are added each time you regrain. Oxidation hidden in the casting
grain will reappear as defects in your finished pieces. Eventually
it is necessary to purge your regrained metal supply because of
the defects caused by oxide buildup. Purging is an expensive solution
that does not work. The next time you grain, the oxide buildup
process starts all over again. Control the oxide problem before
it starts, and you will reap the benefits of consistent quality
and lower reject rates every day.
