silicone box mold for prop making

14
5/21/2018 SiliconeBoxMoldforPropMaking-slidepdf.com http://slidepdf.com/reader/full/silicone-box-mold-for-prop-making 1/14 http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/ Food Living Outside Play Technology Workshop Silicone Box Mold For Prop Making by Joe Sargent on May 11, 2014 Table of Contents Silicone Box Mold For Prop Making . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intro: Silicone Box Mold For Prop Making . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 1: Materials And Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 2: Making The Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 3: Claying Your Piece . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 4: Claying the box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 5: Claying The Box And Piece . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 6: Keying And Funnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 7: Release And Clamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 8: Funnels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 9: Calculating And Mixing SIlicone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 10: Pouring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 11: Creating The Second Half . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Step 12: Finishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Instructables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Advertisements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Upload: roberto-jardon

Post on 12-Oct-2015

28 views

Category:

Documents


0 download

TRANSCRIPT

  • 5/21/2018 Silicone Box Mold for Prop Making

    1/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Food Living Outside Play Technology Workshop

    Silicone Box Mold For Prop Makingby Joe Sargenton May 11, 2014

    Table of Contents

    Silicone Box Mold For Prop Making ..............................................................................................

    Intro: Silicone Box Mold For Prop Making ......................................................................................

    Step 1: Materials And Tools .................................................................................................

    Step 2: Making The Box ...................................................................................................

    Step 3: Claying Your Piece .................................................................................................

    Step 4: Claying the box ....................................................................................................

    Step 5: Claying The Box And Piece ...........................................................................................

    Step 6: Keying And Funnel .................................................................................................

    Step 7: Release And Clamping ..............................................................................................

    Step 8: Funnels ..........................................................................................................

    Step 9: Calculating And Mixing SIlicone ........................................................................................

    Step 10: Pouring .........................................................................................................

    Step 11: Creating The Second Half ...........................................................................................

    Step 12: Finishing ........................................................................................................

    Related Instructables ......................................................................................................

    Advertisements .............................................................................................................

    Comments ..............................................................................................................

    http://www.instructables.com/member/Joe%20Sargent/?utm_source=pdf&utm_campaign=titlehttp://www.instructables.com/tag/type-id/category-workshop/http://www.instructables.com/tag/type-id/category-technology/http://www.instructables.com/tag/type-id/category-play/http://www.instructables.com/tag/type-id/category-outside/http://www.instructables.com/tag/type-id/category-living/http://www.instructables.com/tag/type-id/category-food/
  • 5/21/2018 Silicone Box Mold for Prop Making

    2/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Intro: Silicone Box Mold For Prop MakingSilicone box molds are a fairly simple and very effective way to mold simply shaped objects. I molded a pipe wrench, but you can mold many things (but not everywhich I will get to later) with this style mold. Very soon I will be posting the second half of this process, which is casting a part from the mold. I will be making a flexfoam wrench that looks exactly like the real thing, but that you can hit someone over the head with. Just creating a mold takes many steps, each of which is incredimportant, so just focusing on that should help maintain clarity. This style mold is best used with a simple, fairly uniform shape, with very little or no undercuts. Unare pieces that hang off the part you are molding, that would stick in the mold, not allowing you to remove the piece you cast. Envision trying to mold a flower, eacwould stick into the mold in different directions. A two-part boxed mold is terrible for molding things like that, but is great for molding things like a cell phone, propweapons, or a cigar (all things I have molded in this style).

    Step 1:Materials And ToolsMatierials

    - Platinum Cure Silicone. The cost will be dependent on what you are molding but a gallon kit (silicone and catalyst) usually costs around $100 per gallon. I explailater step how to estimate how much silicone you will need

    - Sulfur-free plasticine clay. $5 a block at any art supply store. Plasticine clay is an oil based clay. Make sure it is sulfur-free because sulfur inhibits platinum cure swhich will ruin your mold. Again, how much you need depends on your mold.

    - One 4'x4' sheet of plywood. $20 at any home center

    - Petroleum Jelly (Vaseoline)

    - Baby Oil

    - Wood Glue

    - Two large clean mixing containers

    - Stir sticks

    - Disposable cups

    - 2" chip brush

    - eight 3/8" nuts

    - Two small plastic funnels

    - Rubber Gloves

    NOTE ON SILICONE: Silicone is very expensive so I will show you ways through-out how to minimize your use. Make sure and purchase platinum cure silicone, ncure silicone. Platinum cure does not need to be degassed, which is a process of putting silicone into a vacuum pot to get out any air bubbles, Tin cure does.

    Tools

    - Safety Glasses

    - Skill saw or table saw

    - Hot glue gun

    - Hand drill

    - 1" Forstner or paddle bit

    - Pencil

    - Utility knife

    - Tape measure

    - Scale which reads to a hundredth of an inch

    - Screw gun

    - 2 Large Clamps

  • 5/21/2018 Silicone Box Mold for Prop Making

    3/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Step 2:Making The BoxIf you do not know how to make a plywood box there are some great Instructables that will show you how. To establish the inside dimensions of your box, set youon the corner of your plywood and then add 1/2" around the entire perimeter of the object. This allows 1/2" silicone walls to form around your piece, which is plentbox mold. Measure the height of your piece and then add 1 1/8", this allows for 1/2" top and bottom for silicone and an 1/8" for the kerf of the blade when you cut tin half. These measurements set the inside dimensions of your box, but remember your overall box wi ll be larger because of the material thickness. Cut your box and then mark your sides because the box will only line up correctly one way. Because of the shape of the wrench I added some fil ler pieces to my box to minimizunnecessary silicone (the stuff is expensive). The shape of your piece wi ll dictate if you need to add filler. Just remember to have at least a 1/2" of clearance arouentire piece. Drill two evenly spaced 1" holes in one side of the box.

  • 5/21/2018 Silicone Box Mold for Prop Making

    4/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

  • 5/21/2018 Silicone Box Mold for Prop Making

    5/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Step 3:Claying Your PieceThe beauty of silicone is that it flows into every nook and cranny of the part you are trying to replicate. This is why it makes such great molds, but you need to makit doesn't get into bad places. Use the plasticine to block off any hole or crevice that is not crucial to the part, or is somewhere that only a very thin layer of siliconeget. Once you have clayed the area, smooth it out to make a nice finish. The silicone will pick up every detail so you need to make the clay on your part blend intopiece the best you can.

  • 5/21/2018 Silicone Box Mold for Prop Making

    6/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Step 4:Claying the boxFill the half of the box without holes completely with clay, getting it as flat and level with the sides as you can. Use a wire or piece of straight wood to check level ascrap down high spots. Once your clay is set put your piece on the clay and use a pencil or awl to mark around the piece.

  • 5/21/2018 Silicone Box Mold for Prop Making

    7/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Step 5:Claying The Box And PieceScrap out the clay where the piece wil l sit, keeping in mind that only half the piece will sit in the clay. I used a sculpting tool that you can get at any art store but yohave to. A pencil and a spoon will work. If possible mark the center of your part with a Sharpee. I had the casting marks on the wrench to follow so I did not have ta mark. It is important to get very close to the exact center of the piece. Once the piece sits in the clay correctly fill in clay around the piece, making sure to get thetightly around the entire perimeter and then smoothing the clay as flat as possible.

  • 5/21/2018 Silicone Box Mold for Prop Making

    8/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Step 6:Keying And FunnelCorrectly keying a mold is one of the most important steps in any mold process. Keying makes sure every time you take your mold apart and put it back together iup correctly. The beauty of a box mold is that the box itself is a key around the entire perimeter. Other types of molds require many more keys. 3/8" nuts filled withmake simple and quick keys. Place them in each corner and then add more as needed. Make a few small indentations 3/8" away from the part where you can usinclay tool, pencil, or screwdriver and then smooth with your hands. Add a half circle of clay to the top of your part making sure it goes from your part to the edge of Once the mold is completely finished the negative of this clay will act as a funnel where you will pour your casting medium. Where to add the f ill spout is different opiece, but here are some rough guidelines for placement.

    1: The most important point of filler placement is to not create an air pocket. This is an area that when you are filling your mold with your casting medium air couldtrapped. If I placed the filler hole on the small end of my wrench as the mold filled with resin air would become trapped above the adjuster nut. Take a good look apart and try to envision spots where air could be trapped when placing the fil ler hole.

    2: If your piece tappers or has a very narrow area, like my wrench, put the funnel on the widest area. Unless it will cause an air pocket. If you are molding a swordfunnel on the butt of the sword.

    3: If your piece is fairly symmetrical you can place it on any side as long as it doesn't cause an air pocket.

    4: Sometimes your are going to get air pockets in your mold, I will show you on the next Instructable how to fix this.

  • 5/21/2018 Silicone Box Mold for Prop Making

    9/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Step 7:Release And ClampingRelease (or grease) keeps things from sticking to other things. Silicone doesn't like to stick to things (except to other silicone) but it is good to grease everything omold (except the box). There are many of f-the-shelf releases but the best I have ever used is petroleum jelly (Vaseline) thinned with mineral oil (baby oil). The petjelly is the release, use only enough mineral oil to make it easily brushable. Brush your part and the clay with the grease. Silicone picks up every detail and any brmark will transfer, so wipe down your part with a paper towel. The brush marks will be gone but the part will still have plenty of release, it doesn't take much. Do nthe side of your box that the part and clay is not in. The silicone needs to stick to that box so it stays in place. Securely clamp you box together to the edge of a taMake sure to clamp along the edges. If you clamp down hard in the middle the box will deform and once released the silicone will not be properly backed.

  • 5/21/2018 Silicone Box Mold for Prop Making

    10/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Step 8:FunnelsSet the plastic funnels in the fill holes and mark where they sit . Cut them to that height and then hot glue them to the fill holes. These make pouring the silicone measier and keep any overflow from going all over your box

  • 5/21/2018 Silicone Box Mold for Prop Making

    11/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Step 9:Calculating And Mixing SIliconeSAFETY NOTE: When working with silicone make sure and wear gloves and safety glasses. The catalyst is very toxic.

    To know how much silicone you will need to pour one side calculate the volume of your box in cubic inches and convert that to gallons. Divide the number of gallohalf and that is how much silicone you will need to pour your f irst side. Obviously your part will displace some silicone so try and estimate and subtract i t. Silicone usually a 10:1 ratio of silicone to catalyst by weight, but check whatever product you are using. It also needs to be very thoroughly mixed. Using the "two bucket" mmeasure out your silicone and catalyst in one bucket and mix. Then transfer to another container to do the final mix. This guarantees you won't have any unmixedthe silicone and catalyst until there are no white streaks.

  • 5/21/2018 Silicone Box Mold for Prop Making

    12/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Step 10:PouringSlowly pour the silicone into one of the funnels. Only pour into one hole so that the other hole can function as an air vent. If you pour into both holes there is a chaan air bubble will form, ruining the mold. Pour until the silicone reaches the bottom of the funnel of the air vent. If you did not mix enough silicone to fill the mold dopanic, just mix some more, you have t ime. Except for some specialty silicone, most silicone has a very long working time (pot life). Let the silicone fully cure over n

    Step 11:Creating The Second HalfAfter your first pour has fully cured cut the funnels, and the silicone within them, off and open your mold. Put your part in the silicone side and grease the part andimportantly the silicone. Add the other half circle of clay to finish the future fill spout. Remove all of the clay and then drill two filler holes in the first side of your boxnot grease it. Clamp up your box, add the funnels, mix and pour the silicone.

  • 5/21/2018 Silicone Box Mold for Prop Making

    13/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    Step 12:FinishingOnce your second half has cured open up the box and pull out your original. You mold should look great. All that is left to do is cut out the wood above where you the clay filler spout (which I had not done yet in this photo) and then start making parts. Very soon I will be posting a video of how to make very realistic soft foam with your mold.

    Related Instructables

    Trying my handat: Mold Makingand Castingwith SiliconeRTV [Pittsburgh

    Tech Shop]by

    thisisanexparrot

    MoldmakingWith ClearSilicone Rubber

    (video)by

    freemanmfg

    Simple SiliconeRubber Molds(no parting line)

    (video)by

    freemanmfg

    Making RigidMolds WithFast-CastUrethanes

    (video)by

    freemanmfg

    Teenage Mutant

    Ninja Turtlesby

    dericrwWall Climbing

    Hand Holdsby

    jkendahl

    http://www.instructables.com/member/jkendahl/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Wall-Climbing-Hand-Holds/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Wall-Climbing-Hand-Holds/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Wall-Climbing-Hand-Holds/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/dericrw/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Teenage-Mutant-Ninja-Turtles-2/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Teenage-Mutant-Ninja-Turtles-2/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Teenage-Mutant-Ninja-Turtles-2/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/freemanmfg/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Making-Rigid-Molds-With-Fast-Cast-Urethanes/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Making-Rigid-Molds-With-Fast-Cast-Urethanes/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Making-Rigid-Molds-With-Fast-Cast-Urethanes/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Making-Rigid-Molds-With-Fast-Cast-Urethanes/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Making-Rigid-Molds-With-Fast-Cast-Urethanes/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Making-Rigid-Molds-With-Fast-Cast-Urethanes/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/freemanmfg/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Simple-Silicone-Rubber-Molds-no-parting-line/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Simple-Silicone-Rubber-Molds-no-parting-line/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Simple-Silicone-Rubber-Molds-no-parting-line/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Simple-Silicone-Rubber-Molds-no-parting-line/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Simple-Silicone-Rubber-Molds-no-parting-line/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/freemanmfg/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Moldmaking-With-Clear-Silicone-Rubber/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Moldmaking-With-Clear-Silicone-Rubber/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Moldmaking-With-Clear-Silicone-Rubber/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Moldmaking-With-Clear-Silicone-Rubber/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Moldmaking-With-Clear-Silicone-Rubber/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/thisisanexparrot/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Trying-my-hand-at-Mold-Making-and-Casting-with-Si/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Trying-my-hand-at-Mold-Making-and-Casting-with-Si/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Trying-my-hand-at-Mold-Making-and-Casting-with-Si/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Trying-my-hand-at-Mold-Making-and-Casting-with-Si/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Trying-my-hand-at-Mold-Making-and-Casting-with-Si/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Trying-my-hand-at-Mold-Making-and-Casting-with-Si/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Trying-my-hand-at-Mold-Making-and-Casting-with-Si/?utm_source=pdf&utm_campaign=related
  • 5/21/2018 Silicone Box Mold for Prop Making

    14/14http://www.instructables.com/id/Silicone-Box-Mold-For-Prop-Making/

    vertisemets

    Comments