Leshine is fully capable of handling your vacuum casting and silicone molding needs. With years of expertise in the field, we can fabricate your parts to the highest standard and with fast turnarounds.
Vacuum casting is a great way to make rigid or flexible parts, and is ideal for prototypes, engineering testing, concept proofing and display demos. These parts can be made from hundreds of casting polymers.
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Leshine can provide up to 20 parts in 15 days or less, depending on part specification and volume.
Silicone molds are less expensive than the tooling used for injection molding, resulting in low prices.
Depending on the type of equipment used, vacuum casting can to create very large parts.
The vacuum process removes air bubbles and allows the material to capture fine details.
Coloring pigments can be added to the resin for a variety of color options.
Silicone molds can be used around 20 times before they need replacing.
|Step 1:Master building
Masters are 3D solids of your CAD designs. They are usually made by CNC machining or with 3D Printing.
Making Master in 40° temperature. After finish and inspect the masters, we will move to silicone mold making.
|Step 2: Mold making
Casting molds are made from liquid silicone. Half-Fill the casting box with liquid silicone, Heat the casting box until silicone
is fully cured and then allowed to cure in an oven for 16 hours. Fill with extra silicone liquid which is also heated & cured.
Once dried, the mold is cut open and the master removed.
|Step 3: Make the parts
Poured the casting resins into the empty cavity to create a highly accurate copy of the original. It’s even possible to
overmold with two or more materials. Silicone molds are typically good for 20 or so copies of the master pattern.
|Typical lead time
Up to 20 parts in 15 days or less, depends on the part specification and volumes.
± 0.3% (with lower limit on ± 0.3 mm on dimensions smaller than 100 mm)
|Minimum wall thickness
To ensure that the mold is filled properly, a wall thickness of at least 0.75 mm is necessary.
For best results, we recommend a wall thickness of at least 1.5 mm
|Maximum part dimensions
The size of the mold is limited by the dimensions of the vacuum chamber (1900 x 900 x 750 mm)
and by the volume of the product (maximum volume: 10 liters)
Up to 25 copies per mold (depending on the mold’s complexity and the casting materials)
|Color & Finishing
Pigment is added to the liquid polyurethane prior to casting, custom painting and texture.