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CASTEM (SIAM) CO., LTD. / CASTEM (THAILAND) CO., LTD.
Lost Wax Precision Casting - MIM (Metal Injection Molding)

Silicone Rubber Casting

Silicone Rubber Casting

 

What is Silicone Rubber Casting?


Silicone rubber casting method uses molds made by silicone rubber instead of metal molds in the lost wax process.

Features of our Silicone Rubber Casting

Quantity Small lots (less than 100 pieces)
Shape Approx. Max Size 60 cubic mm, Complex shapes that are difficult to create with molds can be produced
Material Various types of steel, stainless steel, and aluminum
Casting surface Dependent on the accuracy of the 3D printed model, stacking is visible.
Accuracy Low precision because it depends on the precision of the 3D printed model. If accuracy is required, additional machining may be necessary to achieve the required dimensions.

Silicone Rubber Ccasting Manufacturing Process

1. 3D printing

Create resin model by 3D printer

2. Silicone rubber mold making

Pour silicone into the frame with the model attached. After the silicone hardens, cut open the mold and remove the model.

3. Wax molding

Inject wax into the silicone mold.

 

 

4. Plaster filling

Frame the wax tree and pour in the stirred plaster. When the plaster hardens, the plaster mold is complete.

5. Dewax / Sintering

Burn out the wax model in an electric furnace.

6. Casting

Pour molten metal into the plaster mold.

Materials

Classification

Material

Stainless Steel

SUS303(Lostwax), SCS13, SCS14,
SCS2A, SUS440C, SCS24

Carbon Steel

S25C(Lostwax), S45C(Lostwax)

NiCrMo Steel

SNCM439(Lostwax)

CrMo Steel

SCM415(Lostwax), SCM435(Lostwax), SCM440(Lostwax)

Tool Steel

SK85(Lostwax), SKH57(Lostwax),
SKS3(Lostwax), SKD11(Lostwax),
​SKD61 (Lostwax)

Heat Resisting Steel

SCH22

Aluminum

AC4C, AC7A

 

Silicone Rubber Casting Product Examples

Aerospace part


Material:

SCS13

Size:

80mm×70mm×40mm

Industry:

Aerospace (Sample product)

Shachihoko


Material:

Stainless Steel

Size:

45mm×20mm×60mm

Industry:

Decoration (In-house product)

 

Notes on Digital Casting / Silicone Rubber Casting

1. Dimensions

The dimensional precision required for industrial products may not be achieved since it depends on the accuracy of the 3D printed model. As a countermeasure, additional machining may be necessary to achieve the required dimensions.

2. Casting Surface

Surface roughness also depends on the accuracy of the 3D printed model, so it is not equivalent to lost wax products.

3. Materials

Not all 3D printed models are suitable for use in digital casting. Some materials may not work well due to issues like residue or expansion during combustion.

 

Latest Update 06 May 2024