TUTORIAL: HOW TO MAKE A SILICONE RUBBER CANDLE MOLD

The following tutorial details the process of making asilicone rubber mold for casting wax lớn make candles.

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Step 1: Select a Model

Select or create a mã sản phẩm to replicate. The final wax candle willbe a copy of thisoriginal model. Many candle makerssculpttheir original models with clay, wood or wax or utilize computer-based options like 3-D printers and CNCrouters to lớn producetheir designs.

The model that we selected for this particular projectis madeof glass:

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This glass mã sản phẩm is hollow; however, we would like thefinal candle khổng lồ be solid, so we fill the model with wood & clay:

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The mold rubber will pick up every detail of the model, so the clay is carefully smoothed out:

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Step 2: Construct a Mold Box & Securethe Model

To make a one-piece poured block mold, construct a mold box or select a suitable container to place your model in. Make sure that there is enough space between the modeland the mold box walls to lớn create mold walls with an appropriate thickness.

We leaveapproximately 1″ of space for mold walls và the mold bottom in this example.

Plywood is being used to lớn construct the mold box. Porous materials like this must be sealed prior to pouring liquid mold rubber. The plywood will be sealed in Step 3.

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Using a hole saw, we createa hole in the bottom board of the mold boxto hide this part of the mã sản phẩm (we vì not want this protrusion on the final candle):

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Securely adhere the model to the bottom board so it does not float when the mold rubber is poured around it.

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While the epoxy is curing, construct the walls of the mold box:

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Step 3: Apply Sealer & Release Agents as Necessary và Finish Preparing the Model

Applyappropriate sealers and/or release agents lớn the mold box.

Not sure which release agent to lớn use for your particular project? Our Sealer & Release Agent Selection Guidemay be helpful.

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Apply a release agent lớn the model.

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Allow sufficient time for the solvent in Pol-Ease 2350 lớn evaporate (~1 hour, depending on temperature và humidity) before moving on lớn the next steps.

Seal any areas around the mã sản phẩm where rubber may leak. There aresmall gaps at the base of this model, so we seal that area with plasticine clay (warmed up for easier application). Other options for sealing include caulk và hot glue.

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Smooth và flatten the clay as best as possible:

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Place the model in the mold box & secure the bottom board to the mold box walls:

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Place the mold box and model in the proper position for pouring the liquid rubber:

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Seal the edges of the mold box with plasticine clay to help prevent rubber from leaking outside of the box:

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Step 4: Measure, Mix và Pour Silicone Rubber

Basic Specifications for this Rubber:

Type of Silicone: Platinum-Cured Mix Ratio: 1A:1B Shore Hardness: A15 Pour Time: đôi mươi minutes Demold Time: 4-5 hours Color: white Translucent Mixed Viscosity: 2,500 CP

NOTE ABOUT CURE INHIBITION: Contamination from amines, sulfur, tin compounds, polyester resins, some 3D-printed plastics, & some other materials can cause cure inhibition inplatinum-cured silicone rubbers, so ensure that your mã sản phẩm and other materials coming into tương tác with the silicone vì chưng not contain these inhibitors. It is best to perform a small demo cure on your model before pouring a large mold.

This particular mold requires approximately 10 lb of PlatSil 73-15 rubber (5 lb of Part A & 5 lb of Part B).

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Weigh out Part B on a digital scale – we recommend pouring Part B first because it is lower in viscosity than Part A and is less likely to cling to the sides of the mixing container:

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Tare the scale and weigh out Part A into the same mixing container.

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Thoroughly phối Part A & Part B together, scraping the sides và bottom of the mixing container several times:

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Carefully pour the mixedrubber into the mold box. Pour into one corner and allow the rubber torise. Vì chưng not pour rubber directly onto the model:

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PlatSil 73-15 can be demolded in 4 to lớn 5 hours at room temperature. If a different rubber is being used, make sure to check the demold time of that particular rubber. Demolding too soon can cause permanent warping of the mold.

Step 5: Demold & Cut Mold (if necessary)

Carefully remove the mold box bottom board & walls. A putty knife may be helpful in this process:

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Dependingon the shape of the model, the mold may have to lớn be cut to lớn remove the model and subsequent castings. We use a scalpel to lớn cut an irregular pattern on one side of the mold (irregular patterns realign better for casting than straight cuts):

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Carefully remove the model from the mold:

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Make a small hole in the bottom of the mold to later accommodate a wick:

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This next step is completely optional. Before we move on to casting wax, we make a plastic copy of the original modeljust in case we need lớn make more molds at a later date (we broke the original glass mã sản phẩm when demolding).Wooden boards và duct tape are used to support the mold when casting (you could also use the original mold box for support):

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EasyFlo 60, a fast-setting polyurethane plastic, is poured into the mold to make the copy:

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This plastic can be demolded in 15-30 minutes:

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Step 6: Pour Wax into Mold

Feed a wick through the hole created earlier:

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Temporarily tie a knot in the wick:

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Secure the wick above the pour hole of the mold. Make sure it is centered:

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Melt wax with the appropriate equipment and địa chỉ cửa hàng dyes & fragrances if desired:

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Carefully pour the wax into the mold:

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Allow the wax to lớn completely cool:

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Step 7: Remove Candle from Mold

Carefully remove the candle from the mold:

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Trim the wick as necessary:

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Hundreds of candles can be made in this single mold. A finished candle is pictured below:

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