Injection Molding
Tooling and molding for your repeat plastic parts.
YOUR DRAWING. YOUR MATERIAL. YOUR ACCEPTANCE PLAN.
Custom Sand Casting Services for Your Cored & Machined Parts
Plan your steel or iron casting around internal passages, machining stock and acceptance criteria. Review the pattern, core plan and final drawing before committing to production.
Start with CAD model + controlled 2D drawing.
- Cored geometry review
- Material grade & condition
- Machining & finish scope
- Trial & repeat quantities
- Agreed acceptance criteria
Material Review
Casting grade and delivery condition.
Patterns & Cores
Geometry and reusable tooling.
Machining Stock
For your final fit.
Sample Approval
Trial castings and validation.
U.S. Coordination
Dallas-area project support.
3 Decisions Before You Order
Define the requirements that affect your material, tooling and acceptance plan.
01
Your material
Casting grade, condition and service environment.
02
Your interfaces
Cored passages, machining datums and final fit.
03
Your demand
Trial quantity, first order and repeat demand.
Sand Casting Components for Your Equipment
Sand casting forms metal in an expendable sand mold. Cores can create internal passages.
Plan Your Housing Around Its Mating Features
Mark bearing bores, sealing faces and assembly datums; keep the as-cast envelope separate from final machined features.
| For your function | Environment, mating parts and enclosure needs |
|---|---|
| For your fit | Datums, bores and machined sealing faces |
| For your approval | Surface zones and acceptance records |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Start with Your Casting Grade and Condition
Match your sand casting materials to loads, temperature and required properties. Grade, availability, delivery condition and test scope are confirmed for your drawing.
| Your grade | Casting specification and delivery condition |
|---|---|
| Your use | Loads, temperature, fluids and exposure |
| Your records | Material lot and required property tests |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Plan the Pattern, Core Box and Machining Route
Sand casting pattern design must allow for shrinkage, release and specified machining stock. Confirm the mold and core system for your grade and geometry.
| Your pattern | Parting, draft and shrinkage compensation |
|---|---|
| Your cores | Core prints, support and removal access |
| Your final fit | Datums, stock and fixture access |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Agree What Your Actual Casting Must Pass
Use trial castings to confirm the agreed material, cored geometry and finished features. A CNC-only mockup does not validate as-cast quality.
| Your material | Grade, condition and traceability |
|---|---|
| Your casting | Core position, surfaces and specified tests |
| Your final fit | Machined dimensions and datum scheme |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Plan Your Internal Passages Before Tooling
For sand casting for pumps and valves, identify flow passages, clean-out access and specified pressure or leak checks.
| For your flow | Passage geometry and clean-out access |
|---|---|
| For your fit | Core position, wall sections and machining datums |
| For your approval | Surface zones, records and specified tests |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Start with Your Casting Grade and Condition
Match your sand casting materials to loads, temperature and required properties. Grade, availability, delivery condition and test scope are confirmed for your drawing.
| Your grade | Casting specification and delivery condition |
|---|---|
| Your use | Loads, temperature, fluids and exposure |
| Your records | Material lot and required property tests |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Plan the Pattern, Core Box and Machining Route
Sand casting pattern design must allow for shrinkage, release and specified machining stock. Confirm the mold and core system for your grade and geometry.
| Your pattern | Parting, draft and shrinkage compensation |
|---|---|
| Your cores | Core prints, support and removal access |
| Your final fit | Datums, stock and fixture access |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Agree What Your Actual Casting Must Pass
Use trial castings to confirm the agreed material, cored geometry and finished features. A CNC-only mockup does not validate as-cast quality.
| Your material | Grade, condition and traceability |
|---|---|
| Your casting | Core position, surfaces and specified tests |
| Your final fit | Machined dimensions and datum scheme |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Build Your Support Around Its Load Path
Define mounting pads, load direction, fillets and the machined faces that locate your assembly.
| For your loads | Direction, mounting and working conditions |
|---|---|
| For your fit | Machined pads, fasteners and locating features |
| For your approval | Drawing limits and specified load checks |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Start with Your Casting Grade and Condition
Match your sand casting materials to loads, temperature and required properties. Grade, availability, delivery condition and test scope are confirmed for your drawing.
| Your grade | Casting specification and delivery condition |
|---|---|
| Your use | Loads, temperature, fluids and exposure |
| Your records | Material lot and required property tests |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Plan the Pattern, Core Box and Machining Route
Sand casting pattern design must allow for shrinkage, release and specified machining stock. Confirm the mold and core system for your grade and geometry.
| Your pattern | Parting, draft and shrinkage compensation |
|---|---|
| Your cores | Core prints, support and removal access |
| Your final fit | Datums, stock and fixture access |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Agree What Your Actual Casting Must Pass
Use trial castings to confirm the agreed material, cored geometry and finished features. A CNC-only mockup does not validate as-cast quality.
| Your material | Grade, condition and traceability |
|---|---|
| Your casting | Core position, surfaces and specified tests |
| Your final fit | Machined dimensions and datum scheme |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Review Sand Casting for Your Custom Parts
Share your drawing and use conditions so material, molding route, cores and secondary operations can be assessed together.
| For your function | Loads, environment and mating parts |
|---|---|
| For your fit | Cored geometry, datums and final dimensions |
| For your supply | Trial, first-order and annual demand |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Start with Your Casting Grade and Condition
Match your sand casting materials to loads, temperature and required properties. Grade, availability, delivery condition and test scope are confirmed for your drawing.
| Your grade | Casting specification and delivery condition |
|---|---|
| Your use | Loads, temperature, fluids and exposure |
| Your records | Material lot and required property tests |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Plan the Pattern, Core Box and Machining Route
Sand casting pattern design must allow for shrinkage, release and specified machining stock. Confirm the mold and core system for your grade and geometry.
| Your pattern | Parting, draft and shrinkage compensation |
|---|---|
| Your cores | Core prints, support and removal access |
| Your final fit | Datums, stock and fixture access |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Agree What Your Actual Casting Must Pass
Use trial castings to confirm the agreed material, cored geometry and finished features. A CNC-only mockup does not validate as-cast quality.
| Your material | Grade, condition and traceability |
|---|---|
| Your casting | Core position, surfaces and specified tests |
| Your final fit | Machined dimensions and datum scheme |
Application concepts; geometry, grade and manufacturing scope are reviewed for your project.
Sand Casting Materials: Start with Your Grade
Select the material for your application, environment and performance needs.
Steel Sand Casting
Specify the casting grade, heat-treatment condition and required properties.
- Carbon steel and alloy steel options require a grade and supply review.
- Define strength and toughness requirements.
- Specify machined fits and inspection.
Iron Sand Casting
Identify iron type, casting grade and material acceptance requirements.
- Review gray iron versus ductile iron for your loads and geometry.
- Agree grade-specific property checks.
- Identify mounting and machining datums.
Know What You Own — and What Is Consumed
A sand casting pattern defines the external shape; a core box forms a core when internal features require one.
| Reusable tooling | Pattern and core box, where needed. |
|---|---|
| Expendable items | Sand mold and cores, where used, for each casting cycle. |
Your Sand Casting Process in 6 Steps
A clear sequence links your drawing, expendable mold, actual casting and final acceptance.
Pattern & Core Plan
Design and review
Mold & Core Making
Prepare sand mold
Pour & Solidify
Controlled process
Shakeout & Clean
Remove sand and gates
Machine as Specified
CNC and finishing
Inspect & Approve
Agreed evidence
Machining, heat treatment and finishing are included only when agreed in your project scope.
Resolve 6 Design Risks Before Pattern Release
Use these sand casting design guidelines to identify your critical interfaces before tooling.
Review Your Wall Transitions and Fillets
Review abrupt section changes and load-bearing fillets with the material and molding route. Avoid adopting a universal minimum wall.
01
Your input
Wall sections, loads and critical radii
02
Our review
Transitions, fillets and local cooling
Confirm methods, scope and acceptance limits for your part.
Agree Your Pattern Release and Parting Plan
Define the draft angle for sand casting around pattern depth, withdrawal direction and your required surfaces.
01
Your input
Release direction and critical faces
02
Our review
Draft, parting and pattern withdrawal
Confirm methods, scope and acceptance limits for your part.
Keep Your Cored Passages Usable
Identify core location, support, passage intersections and access for removing core material after casting.
01
Your input
Passages, intersections and clean-out zones
02
Our review
Core prints, support and removal access
Confirm methods, scope and acceptance limits for your part.
Review Feeding Around Your Thick Sections
Review hot spots, section transitions and feeding access. Shrinkage compensation in the pattern does not replace soundness review.
01
Your input
Heavy sections and quality requirements
02
Our review
Feeding, hot spots and specified soundness checks
Confirm methods, scope and acceptance limits for your part.
Leave Stock Where Your Final Fit Needs It
Identify the casting grade before setting the nominal casting geometry and machining stock.
EXAMPLE ONLY — NOT A RECOMMENDED ALLOWANCE
01
Finished external width
50.0 mm
02
Stock per opposite face
2.0 mm
03
Nominal as-cast width
54.0 mm
Assumes stock on 2 opposite faces: 50.0 mm + (2 × 2.0 mm) = 54.0 mm. This is not a pattern dimension. Shrinkage compensation, draft and casting variation are reviewed separately.
Actual stock depends on grade, geometry, datums and the agreed molding route.
Define Your Surface and Internal Acceptance
Review sand casting defects against your agreed limits. Surface discontinuities, porosity and internal indications need an inspection scope, not a zero-defect promise.
01
Your input
Surface limits and required internal tests
02
Our review
Acceptance zones, methods and repair permissions
Confirm methods, scope and acceptance limits for your part.
2 Drawing States. Separate Surface Criteria.
Set sand casting tolerances by feature, datum and delivery condition.
| Part state | Your key features | Review focus |
|---|---|---|
| As-cast | Walls, core position and locating stock | Agreed casting limits and inspection zones |
| Machined | Bores, threads and mating faces | Final drawing and datum scheme |
Specify sand casting surface finish on faces that remain unmachined. Approve texture, cleanup zones and machined surfaces separately; identify Ra or Rz and the measurement location when required.
Approve 3 Evidence Groups Before Production
Agree the records and acceptance limits you need before release.
Confirm Your Grade and Lot Records
Review the casting grade, delivery condition and material records against your controlled specification.
Material RecordCasting ReportDimensional Report
Assess sand casting defects by location, inspection method and acceptance limits. Agree special tests and repair permissions before production.
Check the Casting, Not Just a Machined Mockup
Plan prototype sand casting samples using the intended grade and molding route. A CNC-only model does not establish as-cast quality.
Material RecordCasting ReportDimensional Report
Assess sand casting defects by location, inspection method and acceptance limits. Agree special tests and repair permissions before production.
Approve Your Machined Interfaces
Check bores, threads, mating faces and datums after the specified secondary operations.
Material RecordCasting ReportDimensional Report
Assess sand casting defects by location, inspection method and acceptance limits. Agree special tests and repair permissions before production.
Release Your Order with Clear Records
Review acceptance records, labels, part protection and shipping requirements before dispatch.
Material RecordCasting ReportDimensional Report
Assess sand casting defects by location, inspection method and acceptance limits. Agree special tests and repair permissions before production.
Compare Your Quote at 3 Demand Levels
Review sand casting cost against the same drawing, material and acceptance scope.
EXAMPLE RFQ QUANTITIES — NOT MINIMUM ORDERS
50 pcs
Prototype / pilot comparison
200 pcs
Initial production comparison
1,000 pcs
Higher-volume comparison
Patterns & core boxes
Molds & cores
Metal & pouring
Secondary operations
Inspection
Delivery
Illustrative RFQ quantities, not minimum orders. Replace them with your actual demand; compare low volume sand casting against core-making and batch economics.
4 Terms to Agree with Your Supplier
Review sand casting tooling cost, responsibilities and commercial terms with your sand casting supplier.
Ownership & storage
Who owns the pattern and core box, where it is stored and how it is protected.
Maintenance & expected life
Agree maintenance and expected service life for the actual tooling and route.
Drawing changes & sample approval
How design changes are charged, controlled and approved.
Transfer & repeat orders
Conditions for future releases, tool transfer and replacement.
China Manufacturing. Dallas-Area Coordination.
Coordinate drawing review, sample decisions and delivery with your project contact. Manufacturing scope and location are confirmed in your quotation.
6 Inputs for Your Sand Casting Quote
Send the details that affect cost and acceptance.
- 01CAD + controlled drawing
- 02Casting grade + delivery condition
- 03Trial, first-order + annual quantities
- 04Cores, datums + machined features
- 05Surface + inspection requirements
- 06Required date + delivery location
Answers Before You Commit
Explore Other Casting Routes →How accurate is sand casting?
Distinguish as-cast dimensions from machined features. Sand casting dimensional tolerances depend on size, grade, molding route and datum scheme. Confirm the agreed limits on your drawing before pattern release.
Can you use my existing pattern or core box?
Share the tooling drawings, revision, condition and ownership records. Compatibility, wear, core prints and the intended molding route must be reviewed before accepting an existing tool.
How long does sand casting take?
Confirm separate milestones for drawing approval, patterns and core boxes, trial castings, any heat treatment, machining and sample acceptance. Production and transport follow the agreed release plan; timing is confirmed for your project.
What is the minimum order quantity for sand casting?
The economic batch depends on tooling, grade, geometry, cores and acceptance scope. Request a comparison at your trial, first-order and repeat quantities. The example quantities on this page are not minimum orders.
What are the downsides of sand casting?
As-cast texture, dimensional variation, core-making and cleanup can add work. Critical fits often need machining. Compare the total finished-part cost and acceptance plan rather than the casting price alone.
Can sand cast parts be CNC machined?
Yes, where the casting grade and geometry suit the operation. Identify stock, locating datums, bore and thread requirements, fixture access and the final inspection state. Include the specified machining in your quotation.
Die casting vs sand casting: which fits my part?
Compare alloy, cored geometry, part size, finished surface, tooling investment and demand. Sand molds are expendable; pressure die casting uses a reusable metal die. Review the finished-part requirements before choosing a route.
