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The Backyard Foundry And Forced Air Burners

Furnace burners potentially create more thanburner design is simple, yet effective, but
enough problems for the hobby metal castingthere are some components incorporated in the
worker, it is not unusual to read aboutdesign that only require basic lathe turning
people who are attempting to build a furnace,skills. But general workshop knowledge is
only to be confronted with problems andsufficient to build this item. There's no
frustration  with  a  complex  burner?rocket science involved.The blower consists
of a second hand household vacuum cleaner
It is quite simple to construct a crucible(the type that has a second outlet for the
furnace, but the stumbling block seems to be:hose connection that blows). The vac also has
"The burner". Why?Problems seem to manifestan electronic vari motor speed control, which
themselves because:For some reason, peopleenables a regulated low-volume airflow to be
choose to fabricate complex burners fromdelivered during the burner start up
detailed drawings without the skills, toolingphase.This feature is MOST important during
and machining facilities in which thethe furnace start up.Does this burner work?
original designer employed during the designYou bet it does, the burner is capable of
& building process.With the necessarymelting a 5 Kg (11lbs) charge of Aluminium
workshop skills coupled with a reasonablefrom a cold start in less than 40 minutes.The
selection of equipment & tools, will have agas supply is provided from a Liquid
marked effect on how well you, as a hobbyPetroleum (LP) cylinder (Propane in the
foundry worker, will be able to construct thestates) It is essential that the gas supply
equipment required for the successful meltingbe controlled by an adjustable industrial
of metal.There are no short cuts when itdiaphragm gas regulator gauge suitable for LP
comes to building equipment for your hobbygas, there is no other SAFE way to regulate &
foundry, to cobble something together in adeliver fuel gas to a furnace burner. A ball
rough fashion is only asking for trouble invalve should be installed in line as an
the future, it is well to heed the old tradeemergency shut off valve.There's no reason to
school  teacher  quote:build & operate complex burners that require
special size jets, and shrouds, which must be
"If a job is worth doing, you might as welloperated at a certain gas/air pressure? There
do  it  properly  in  the  first  place"is nothing more frustrating than an apparatus
that won't operate as it should; why spend
He is right, you know.You can learn how tohalf the day mucking around with something
build an effective simple furnace burner,that is an absolute pain to use, when you
which is well documented in the hobby foundryshould be enjoying your metal casting
ebook "Metal Casting Made Easy" available atexperience!The people who design & build
our web site. But to explain everything incomplex burners for other's to copy, possess
detail here would take up far too much time &lathes, milling machines and many other
space.Following is a simplifiedexpensive machine tools to build the burners,
description:The burner consists of a longbut if you choose to build it even slightly
plain black mild steel pipe. The burner enddifferent to the original design specs, there
nozzle consists of an inverted cone. There isis a good chance the burner just wont work
a mid section where a venturi is installed;properly!To learn more about building hobby
the gas jet is located near the venturi.Themetal  casting  tools  and  equipment, visit:
simple brass jet protrudes into the forced
air stream, which travels through the burnerA rich info resource centre for the hobby
tube. The gas jet orifice is quite large andmetal caster.This article may be reproduced
operates under low pressure; the airas long as the URL links and reference
delivered by the blower to the burner tube isremain.
low pressure, but moves at a high volume.The



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