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hold molding is another very common mode making technique
glove mulder easy to be mold an ideal for casting materials that require quick
cool down
glove mulder also economical from the standpoint if they use considerably less
silicone
levels can be made
as a two part box one part glove mold as shown in this video
or a two part box two part global
levels are made by creating a mother mold around the master
the mother mold is made of a backing material such as plaster
urethane resin
or fiberglass reinforced polyester
with the mother mold in place over the master
the thickness of the rubber is controlled resulting in a thin one part
glove mold
illustrate the steps involved in making a glove mold
a santa claus figurine will be used
the mold is being built in a professional mold making shop
and will be used to cast a commercial lina figurines
the first step is to create a mold box
the mold box will support the fiberglass reinforced polyester mother mold
the figuring is measured
one and five eighths inch clearances allowed between the sides of the box and
the master
the mold box is designed as equal sections or has that can be secured
to a baseboard
during the mold making process it will be cut in half
taken apart and reassembled several times screws nails and staples are used
to construct the box
figure we need to be mounted to the baseball
the base of the figurine incentive to ensure that it will be flush and level
multiple screws are used to attach the figure into the center of the baseboard
to ensure
future alignment
when making a glove molded is very important that the master cannot move
or ship once it has been mounted
a single school
would act as a pivot point allowing the figuring to twist return
release agent is now applied to the figuring
a ten percent petroleum jelly and ninety percent nafta solution is used
compressed air evaporates the excess solvent and leaves a thin coating of
petroleum jelly on the master
the back half of the more boxes attached to the base
the next step involves embedding half of the master into soft clay
wood blocks are used as filler
and clears added until only the first half of the figurine is visible
at this point
severe undercuts an extreme projections are reduced by adding clay
now a smooth three-eighths inch layer of clay will be placed over the surface of
the master
this step is very important because the thickness of the clay will determine the
final thickness of the silicone mold
uniform thickness of clay is achieved by rolling the clay between to
three-eighths inch pieces of wood
the clay has been softened by warming up with a small heater or heat lamps
use caution when warming clay because too much heat
can make the claim very hot
even to the point of causing severe burns
the edges of the claire carefully smoothed out of the clay cylinder is
formed at the top of the master
the clay cylinder will become the poor spout into the mother mold
the front half of the master is now completely covered by a uniform
thickness of clay
there are no undercuts and no projections dust a smooth gentle contour
release agent is applied to the clay
the solvent and the release agent breaks down the clay hoping to smooth it out
while removing fingerprints and other imperfections
release agent is also applied to the mating surfaces of the mold box
mating surfaces of the edges of the more box that come into contact with each
other
when the boxes put back together
the front half of the more boxes now put back into place and secured
the next step is to make mother mold
fiberglass reinforced polyester is used to create the mother mold
the fiberglass is carefully layered and smooth over the clay extending one-inch
up the sides of the more box
a total of two layers of fiberglass is used
care is taken to make sure that all bubbles are removed
and layers are completely smooth
and of uniform thickness
straight threads of fiberglass that are not smooth out will harden into sharp me
like projections
after the fiberglass is hardened
the mole boxes turned over and the back half is removed
the wood blocks and clay are removed
the same techniques are used again to apply a three-eighths inch layer of clay
over the exposed back side of the figuring
extra strip of clay is headed down the back side of the master
this is where the rubber will be cut for d molding
the predetermined parting line
to ensure that the two halves of the mother moulder not stick to each other
the exposed fibreglass surfaces coated with a fifty percent petroleum jelly
fifty percent nafta solution
the extra thickness of release agent will prevent fiberglass from sticking to
fiberglass
the techniques for creating the second mother mold are identical to the first
after the fiberglass has hardened
both halves of the mold boxer removed
the layer of clay that was used to cover the master is now removed and set aside
the clay will be weighted
to determine the approximate amount of rubber needed to make the glove mold
each mother mold is thoroughly cleaned using solvent
and a wire brush
air pockets and pip located inside each mother mold
are filled with clay to create a smooth contours
the to mother molds class together
and a poor holden spilled into the top of the moles
the figuring is now thoroughly cleaned to remove dirt
debris
or clay
the master is aligned with each mother mold to check for sufficient spacing
release agent is applied to the inside of each mother mold
as well as the master
the mold boxes reassembled around the figurine and clap together
ashore piece of p_v_c_ pipe is glued to the top of the poor hole to eight in
filling and serve as the reservoir
release agent is applied to the inside of the pipe
the scenes of the more boxer sealed with clay to prevent the rubber from leaking
it is now time to pour the silicone
declared it was removed from the master is weighed to determine the approximate
amount of rubber that will be needed
val corning a chest three are t_v_ high strength mold making rubber
will be used to make the one part glove mold
the material is weighed
and the aired
then slowly poured into the mold
alight placed behind the translucent fiberglass shell
shows the rubber flowing into all the spaces
the mold is gently rock to help remove air pockets
the silicone is poured into it fills the p_v_c_ pipe
the extra rubber in the pipe
taxes insurance in case any of the silicone leaks from the mole box
the silicone is allowed to cure for twenty four hours
before the mole boxes opened
hinges and spring-loaded sash locks are attached
the ages of the more box which is to have to meet
or send it to eliminate any offset
the hinge and lock so sure that the two mother mulch will always be in perfect
alike
the mounting screws are removed from the figuring
and the boxes pried open
the master is removed an excess flashing is tram
the figuring is d molded by cutting the rubber along the predetermined seen line
using a curved blade knife
the blade of the night leaves a tongue in group type of scene
that is self locking when realigned
to make the reproduction with this one part glove
place the mold back into the fiberglass mother moles
realign the scene
close and lock the mold box
and poor the casting resin
plaster reproduction was cast from the mall to show the results
the next section will show the fabrication of a two part black mold
using the same technique
fiberglass support shelling this is a two part black mold created from the
base of the lamp
for this project elastic s was used in so i think this is an addition cure a
product because high care resistance load around her low viscosity and high
in addition resistance and his green in appearance
the techniques used are much the same as for making a glove mal
we pick up where we are removing clay from the second half of the mother mold
the first half is already been created in removed
porthole and events are now drilled into this half
to control tolerances the rubber will be permanently attached to the mother mold
this will be accomplished with dow corning twelve hundred prime coat
the primary is applied to the inside surface of the mother mold
the primer will chemically bind the rubber to the fiberglass
the mold boxes reassembled
and a short piece of p_v_c_ pipe is glued into the poor whole creating a
poor spout
release a gym is applied to the inside of the pipe
none sulfur modeling clay is used to seal all the scenes in the mold box
before the rubber is poured
after mixing and the airing the rubber is then slowly poured into the spouse
as the rubber reaches the air vents small pieces of clay are used to plug
each hole to prevent the silicone from escaping
after the celeste again says cured for twenty four hours
the back half of the more boxes removed and the same steps are repeated to
complete
the two part block mold
a plaster reproduction was cast from the two part black mold to show the results
in it will never
the international symbol of his there is another popular method to make a
reproduction from a master
it is a scandal for brunch on screen
the skin motors economical for large originals and easy to be more even with
complicated designs
this is a quick overview of the steps involved in making a scandal
now calling pictures tour is most commonly used
thin layers of catalysed d aired silicone rubber or crushed or spread
over the surface of the master
these are referred to as the print coats usually two or more prep coats are
applied
a layer of silicone rubber containing ethics appropriate additive is applied
over the top of the prep codes
the addition of the fix a terrific additive to the catalysed rubber
change the silicone from us
flowing
to announce slumping rubber
separating shams are positioned into the silicone rubber at strategic locations
where the mold will be section
a backing material such as plaster reinforced with cecil hemp
urethane resin or fiberglass reinforced polyester
is used to make a mother mulled
the mother mold is removed from the master in sections
the silicone rubber is cut along the sham lines and removed from the master
the sections of rubber molds are then placed into their respective plaster
mother moles
to cast into the skin mold
reassemble the mother molds and locked together
you know foundry applications such as restoration
casting material is poured into the skin mole to create a reproduction
the skin molding method is widely used by the art foundry industry
however it is just one of the many steps in the lost wax process used by this
industry to create bronze statues
in the yard foundry industry
many of the objects to be cast in two bronze must first be reproduced to life
size or even larger
during the enlarging process a variety of materials are used such as chicken
wire
iron rods and urethane foam
the final near likeness is created in clay
an artist will complete the enlarging process by scoping the final detail into
the clay
the next step is to apply a scan multiple created detailed negative
this is usually accomplished in two phases
thin layers of catalysed dear dropper are either brushed on
or sprayed onto the master
these are referred to as print coats
good print coats are important to ensure all the details of the object or
reproduced
the print codes can be brushed on
or applied by spraying
usually more than one coat is required
because of the wide use of sulfur containing clays used by the artists in
this industry only ten cured or condensation cured silicone rubbers a
recommended
dow corning h s two is widely used in this industry
when more than one print code is required
the additional coach should be applied after the previous coat is tax free
many mold makers wait until the previous code is completely dry
before the second phase of creating a skin mold begins
separating bubbles shams are placed where the mold is to be divided
the number of pieces the mold will be divided into depends on its eyes and
configuration
the second phase is to build up the thickness of the silicone mold to
approximately one quarter to three eighths inch
this witness is achieved by adding a fix the tropic additive to the catalysed
silicone rubber mix
this additive turns the free flowing mixture into a nun slump easy to apply
paste
that that's a terrific mixture can be applied to the print code without
slumping or running off
the mixture is also applied to the separating shams
after the fix a terrific coating is smoothed out
and before the rubber cures
mold keys are placed on the surface a designated locations
the key is secured pieces of rubber that ada maligning the rubber mold back
into its support of shell
michelle is often referred to as the mother mold
and is usually made out of plaster reinforced with sizzle him
or fiberglass
with large mall sections handles are often molded into this outer shell for
ease of handling
the plaster mother more sections are first removed from the mold
after the shins are removed
the skin mold is cut along the sham lines and removed from the master
the silicone skin moles are placed into their respective plaster mother mls
after each mold section has been reassembled