3-Piece Ranga Turtle Gravity Die Design
Budget / SalaryHourly project
TypeFreelance project
LocationRemote
Posted2 hours ago
3-Piece Gravity Die Design for a Solid Ranga Turtle Figurine, Exact 2500 g Weight (SolidWorks)
About Ranga
Ranga (रांगा) is the traditional Indian casting metal used for this project. It is tin-based, but locally sourced Ranga may contain other metals, so its exact composition and density must be confirmed before design (see Step 1). Throughout this brief, “Ranga” means our actual casting metal.
Project overview
I need a hand-operated, 3-piece permanent die designed for gravity casting a solid turtle figurine in Ranga. Each finished Ranga casting must weigh 2500 g. The 3D model is ready as a Parasolid (.x_t) file. The die will be made by a toolroom in Indore, India, and used by a traditional caster who normally pours Ranga into sand moulds, so it must be simple to operate by hand.
Casting details
Metal: Ranga, sourced locally (composition to be confirmed)
Casting: solid, single piece
Target weight: 2500 g of finished Ranga, with a tolerance of ±15–25 g
Current model size: [length × width × height in mm]; current model volume: [cm³ from SolidWorks]
Quantity: a few hundred Ranga castings over several years
Finish: mirror-smooth as cast, with no polishing afterwards
Step 1: Ranga density check before design (required)
Please:
Guide us through a simple water-displacement test on a sample of our actual Ranga. We will send you the weights and readings.
Review our results and confirm the density of our Ranga, or advise if a lab or XRF test is needed.
Calculate the exact finished volume needed for 2500 g of Ranga, and the scale factor for the model.
Die requirements
Material: 1.2083 ESR stainless mould steel, hardened to about 48–52 HRC
Three-piece split, with parting lines planned to release the legs cleanly
Model scaled so that the finished Ranga casting, not the cavity, equals 2500 g
Shrinkage allowance for Ranga applied once only, and clearly stated
Gate and feeder on the underside (belly), sized to keep the Ranga casting fully solid with no internal voids
A small hidden recess under the belly for fine weight adjustment, if needed to hold the tolerance
Air vents for a clean, pinhole-free Ranga surface
Locating pins, a clamping arrangement and handles for manual use
Suitable for standard CNC machining and EDM
Deliverables
Ranga density confirmation, volume calculation and scale factor, in writing
3D die assembly in native SolidWorks format and STEP
2D manufacturing drawings with tolerances
A simple operating guide for the caster: die preheating, coating, pouring Ranga, opening and storage
Support for a prototype check before steel is cut: a 3D-printable turtle model at final size for a trial casting in our Ranga, with design corrections if the weight is off
One round of revisions after the toolroom’s review
Required experience
Proven work on gravity or permanent moulds for low-melting metals (tin, pewter, zinc) or aluminium
Experience designing castings to a target weight
Strong SolidWorks skills
Please share 2–3 relevant past projects
About Ranga
Ranga (रांगा) is the traditional Indian casting metal used for this project. It is tin-based, but locally sourced Ranga may contain other metals, so its exact composition and density must be confirmed before design (see Step 1). Throughout this brief, “Ranga” means our actual casting metal.
Project overview
I need a hand-operated, 3-piece permanent die designed for gravity casting a solid turtle figurine in Ranga. Each finished Ranga casting must weigh 2500 g. The 3D model is ready as a Parasolid (.x_t) file. The die will be made by a toolroom in Indore, India, and used by a traditional caster who normally pours Ranga into sand moulds, so it must be simple to operate by hand.
Casting details
Metal: Ranga, sourced locally (composition to be confirmed)
Casting: solid, single piece
Target weight: 2500 g of finished Ranga, with a tolerance of ±15–25 g
Current model size: [length × width × height in mm]; current model volume: [cm³ from SolidWorks]
Quantity: a few hundred Ranga castings over several years
Finish: mirror-smooth as cast, with no polishing afterwards
Step 1: Ranga density check before design (required)
Please:
Guide us through a simple water-displacement test on a sample of our actual Ranga. We will send you the weights and readings.
Review our results and confirm the density of our Ranga, or advise if a lab or XRF test is needed.
Calculate the exact finished volume needed for 2500 g of Ranga, and the scale factor for the model.
Die requirements
Material: 1.2083 ESR stainless mould steel, hardened to about 48–52 HRC
Three-piece split, with parting lines planned to release the legs cleanly
Model scaled so that the finished Ranga casting, not the cavity, equals 2500 g
Shrinkage allowance for Ranga applied once only, and clearly stated
Gate and feeder on the underside (belly), sized to keep the Ranga casting fully solid with no internal voids
A small hidden recess under the belly for fine weight adjustment, if needed to hold the tolerance
Air vents for a clean, pinhole-free Ranga surface
Locating pins, a clamping arrangement and handles for manual use
Suitable for standard CNC machining and EDM
Deliverables
Ranga density confirmation, volume calculation and scale factor, in writing
3D die assembly in native SolidWorks format and STEP
2D manufacturing drawings with tolerances
A simple operating guide for the caster: die preheating, coating, pouring Ranga, opening and storage
Support for a prototype check before steel is cut: a 3D-printable turtle model at final size for a trial casting in our Ranga, with design corrections if the weight is off
One round of revisions after the toolroom’s review
Required experience
Proven work on gravity or permanent moulds for low-melting metals (tin, pewter, zinc) or aluminium
Experience designing castings to a target weight
Strong SolidWorks skills
Please share 2–3 relevant past projects
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