FOAM
LATEX INJECTION GUN
Make-up Special Effects & Stop Motion share many
common fabrication methods and especially the use of Foam
Rubber Latex materials. There are different methods to
fill the mold ..... one is .... by brushing-painting
each mold half with foam latex, then spooning in extra
foam and finally closing the mold pieces together to squeeze out the excess
foam. Another method to fill-up the mold is by injecting the foam into the mold using a very large
syringe tool aka Foam Latex Injector Gun. Both
methods work and both require practice and trial
and error so that you can consistently fill mold without
getting air pockets or bubbles.
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For the benefit of the Stop Motion Animation community,
this is an article
written by special makeup effects artist & supplier
David Schlatter,
posted at the Make-up Artists Board, www.make-upboard.com
This information is presented "as is" for your
own personal use.
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THE
PARTS LIST
One ... 3 inch inside diameter x 6 foot
drain pipe. 6 foot is the shortest length I have found
Two ... 3 inch end caps
Two ... 2 inch flat washers
One...1/2 x 2 inch bolt and nut
One... 3 inch DU-BRO low bounce model airplane tire
One ... 1/2 inch plastic water pipe comes in 6 foot
lengths
One ...1/2 inch plastic threaded male coupling
One ... 1/2 inch plastic threaded female coupling
One each ..... of CPVC Cleaner and CPVC Cement
One ... 24 inches X 1/2 inch plastic sprinkler system
pipe
One ...1/2 inch threaded plastic sprinkler system coupler
One...1/2 inch threaded plastic sprinkler system Tee
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Preparation
and assembly:
Cut a 24 inch long section of 3 inch drain pipe, use sand
paper to sand the ends down until the end caps fit snug
but not so tight that it is difficult to remove them.
Take
one of the end caps and drill a hole large enough to get
a very snug fit ofthe 1/2 inch water pipe then cut a
piece of the water pipe 3/4 inch in length and test fit
the end cap and male coupling. The base of the coupling
should touch the end cap and the water pipe should be
flush with the inside of the end cap. If everything fits
the glue them together and set aside.
Cut a piece of water pipe 8 inches long and glue it to
the plastic threaded female coupling when the glue is
set, thread this to the end cap with the male coupling.
This is the nozzle; you can make the nozzle any length
you want. I found that 4 inch and up to 8 inches are most
useful.
Remove the plastic wheel from the model airplane tire.
Take the Nut and the 1/2inch threaded plastic sprinkler
system coupler you want the nut to fit half way down the
coupler you might need to use a dremel to remove some of
the plastic to get the nut to fit. Once you get the nut
to fit inside the coupler, glue it in place and thread
the other end to the 24 inch X 1/2 inch plastic sprinkler
system pipe and set aside.
Take the remaining end cap and drill a hole large enough
for the 1/2 inch plastic sprinkler system pipe to slide
through without binding. Run the pipe through the end cap
and put the Tee on the pipe to form a handle. the glue
should be set on the nut by now so you can take the bolt
place 1 of the flat washers on it then the tire and
another washer now thread the bolt-tire combination to
the end of the plastic sprinkler pipe. Congratulations
you now have a plunger for your injection gun.
All the glue should be set so fit the plunger in the
drain pipe, you can adjust the plungers fit by tightening
or loosen the bolt. Now fit the nozzle on theother end
and you have a completed injection gun for $25.00 ('04
prices). This is a front loading gun so take off the
nozzle to fill it.
You can replace the drain and water pipe with clear
plastic plexiglass type tubing but the cost will go up if
you do.
If you use the Johnson and Johnson past wax thinned with
alcohol as a releasefor foam latex you can use the left
over Stearic Acid that comes with the latex kits to prop
up you injection gun for a photo like I did.
Good luck! David Schlatter
© 2004 David
Schlatter
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