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Casting Custom Scenery For a Model Railroad
Mold Making and Casting gives Model Railroaders Options for Creating Custom Scenic Display Pieces.

Model Railroaders who have a passion for creating elaborate displays sometimes find that an "off-the-shelf" display piece just isn't good enough. Often, the piece they need was discontinued long ago or they want to create/modify an original.

Smooth-On mold making rubbers and casting plastics offer tremendous possibility and versatility for creating custom display pieces.

The following step-by-step sequence offers detailed instruction on making a two-piece block mold of a rail line telephone pole miniature, circa 1920. OOMOO® silicone rubber is used to make the mold. Perfectly detailed castings are then made using Smooth- Cast® 320 plastic. The process for reproducing this model is quick, easy and relatively low cost.

 Miniature telephone pole is embedded to the half way point of the model in non-sulfur based clay.

1 - Miniature telephone pole is embedded to the half way point of the model in non-sulfur based clay.
 Registration keys are added in the clay by pressing a pen into the surface.

2 - Registration keys are added in the clay by pressing a pen into the surface.
 OOMOO® 30 silicone is mixed and poured over model to create first half of mold.

3 - OOMOO® 30 silicone is mixed and poured over model to create first half of mold.
 OOMOO® 30 is allowed to cure for 6 hours.

4 - OOMOO® 30 is allowed to cure for 6 hours.
 Mold box is turned over, exposing the clay.

5 - Mold box is turned over, exposing the clay.
 Clay is removed from backside of mold exposing other half of the original model.

6 - Clay is removed from backside of mold exposing other half of the original model.
 Clay is fully cleaned from the first half of the mold.

7 - Clay is fully cleaned from the first half of the mold.
 Ease Release® 200 is applied to the exposed silicone rubber surface.

8 - Ease Release® 200 is applied to the exposed silicone rubber surface.
 OOMOO® silicone is mixed and poured, creating the second half of the mold.

9 - OOMOO® silicone is mixed and poured, creating the second half of the mold.
 Second half of mold is allowed to cure. Mold halves are pried apart and the original telephone pole model is removed.

10 - Second half of mold is allowed to cure. Mold halves are pried apart and the original telephone pole model is removed.
 Mold is powder coated using talc. The casting will cure perfectly dry with a matte finish.

11 - Mold is powder coated using talc. The casting will cure perfectly dry with a matte finish.
 Smooth-Cast® 320 casting resin, parts A and B,  are measured out in equal amounts.

12 - Smooth-Cast® 320 casting resin, parts A and B, are measured out in equal amounts.
 Brown So-Strong® Color Tint is added to Smooth-Cast® 320 Part B.

13 - Brown So-Strong® Color Tint is added to Smooth-Cast® 320 Part B.
 Brown color is thoroughly pre-mixed with Smooth-Cast® 320 Part B.

14 - Brown color is thoroughly pre-mixed with Smooth-Cast® 320 Part B.
 Smooth-Cast® 320 Part A is combined with Part B.

15 - Smooth-Cast® 320 Part A is combined with Part B.
 The material is mixed thoroughly for 90 seconds.

16 - The material is mixed thoroughly for 90 seconds.
 A syringe is used to extract mixed Smooth-Cast® 320 from mixing container.

17 - A syringe is used to extract mixed Smooth-Cast® 320 from mixing container.
 The low viscosity Smooth-Cast® 320 is injected into mold.

18 - The low viscosity Smooth-Cast® 320 is injected into mold.
 The material fills the side mold vents, ensuring a bubble-free casting.

19 - The material fills the side mold vents, ensuring a bubble-free casting.
 Smooth-Cast® 320 is allowed to fully cure.

20 - Smooth-Cast® 320 is allowed to fully cure.
 Flashing is removed from final piece with an exacto knife.

21 - Flashing is removed from final piece with an exacto knife.
 The Smooth-Cast® 320 casting reflects perfect detail captured by the rubber mold.

22 - The Smooth-Cast® 320 casting reflects perfect detail captured by the rubber mold.
 Multiple castings can be made from a single OOMOO® silicone mold.

23 - Multiple castings can be made from a single OOMOO® silicone mold.
 Mold making and casting will allow you to reproduce any original model.

24 - Mold making and casting will allow you to reproduce any original model.
 Scenery pieces of any size can be recreated using Smooth-On silicone rubber molds and urethane resins.

25 - Scenery pieces of any size can be recreated using Smooth-On silicone rubber molds and urethane resins.
 Castings reflect perfect detail captured by mold rubber.

26 - Castings reflect perfect detail captured by mold rubber.
 Colors can be added to Smooth-Cast® plastics for a variety of effects.

27 - Colors can be added to Smooth-Cast® plastics for a variety of effects.
 Low temperature melt metal alloys can be cast into OOMOO®  silicone.

28 - Low temperature melt metal alloys can be cast into OOMOO® silicone.
 Railroad scene display house created using Smooth-Cast® 300 white plastic.

29 - Railroad scene display house created using Smooth-Cast® 300 white plastic.
 TASK® 4 plastic made especially for casting ultra thin sections that are unbreakable.

30 - TASK® 4 plastic made especially for casting ultra thin sections that are unbreakable.
 Highly detailed models are easily post-finished with acrylic paints.

31 - Highly detailed models are easily post-finished with acrylic paints.

                   
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