GY
Geometry and parting
Review draft, split lines, undercuts, wall changes, and mould release before committing to tooling.
Casting
Investment and sand casting for industrial parts.
Our Gaomi factory, established in 2002, supplies resin-coated sand and lost-wax investment castings. Send your drawing, material and quantity for a raw-casting or CNC-finished quotation. Carbon steel, iron and stainless steel requirements are reviewed by part.
Casting feasibilityTooling & core reviewRaw-part acceptance
Casting RFQReview the casting route before tooling and production release.
Casting route
Raw casting geometry sets up machining, finish, and inspection.Pattern · cores · alloy · heat treatment · machining stock · inspectionSand castingCored steel and iron geometries
Investment castingSmaller detailed components
Pattern & core planParting and internal passages
Casting inspectionMaterial and raw dimensions
Casting feasibility
Match the casting method to shape, alloy, quantity, and finish.
Casting cost depends on parting lines, cores, wall transitions, tooling life, and surfaces that need machining. See application requirements for heavy equipment castings and power line fittings, or review the finished-part scope for machined castings.
CR
Core design
Confirm internal passages, core support, cleanout access, and the features most sensitive to core movement.
AL
Alloy and heat treatment
Match the specified material and treatment condition to section size, service duty, and inspection needs.
QT
Quantity and tooling
Use order quantity and repeat demand to choose a practical pattern, mould, and sampling plan.
ST
Casting tolerance and stock
Separate as-cast dimensions from machined features and reserve stock only where final control is required.
QC
Casting checks
Define material records, visual limits, dimensions, test scope, and any agreed repair criteria before release.
Investment casting services
Lost-wax precision casting, from part review to finished supply.
Investment casting, also called lost-wax casting, uses a wax pattern to form an expendable mould. JK reviews this route for drawing-based industrial components alongside resin-coated sand casting. The choice depends on geometry, material, finish and order quantities.
01
Define the casting
Send the drawing revision, 3D model if available, cast grade and estimated weight. Mark internal passages, thin sections and the surfaces that must be machined.
02
Agree the first-sample checks
Identify critical dimensions, material records, surface acceptance and any special tests. Tooling, sample approval and repeat-order requirements belong in the quotation.
03
Choose the supply condition
Request raw castings or a combined casting and machining order, with the required heat treatment, finish, inspection and packing scope.
Steel and iron casting materials
Specify the material as carefully as the geometry.
See the material specification guide for grade, standard, treatment condition and report requirements.
Carbon steel castings
Carbon steel is a regular material family for JK's drawing-based parts. We assess sand or investment casting against the component geometry and required properties. State the cast grade, governing standard and heat-treatment condition.
Stainless steel investment casting
Send stainless steel component drawings for part-specific review. Include the exact cast grade, service environment, finish and required material records. Grade availability, casting route and test scope are confirmed in the quotation.
Ductile and gray iron
For suitable housings, hubs, bases and supports, specify the iron grade, strength or hardness requirements and delivery condition. We review the casting and any machined interfaces together.
Finished machined castings
Machining is offered with the castings we supply. Mark bores, faces, threads and tolerances on the finished drawing, then review component features and RFQ requirements.
Send a casting drawing for quotation with quantity per part number, expected annual demand and delivery batches.
Casting definition before tooling
Raw casting definition
Set the casting condition before machining requirements are applied.
A clear raw-casting definition connects the finished drawing to pattern construction, core location, material condition, machining stock, and agreed inspection points.
✓Parting line and draft direction
✓Core locations and internal passages
✓Wall thickness and section transitions
✓Machining stock on functional surfaces
✓Alloy and heat-treatment condition
✓Visual, dimensional, and NDT acceptance
Casting workflow
A casting workflow from feasibility review to production release.
1
RFQ & geometry review
Check alloy, section changes, parting, cores, stock, quantity, and acceptance requirements.
2
Tooling & core plan
Define pattern construction, core arrangement, gating approach, and first-sample checks.
3
First casting & correction
Inspect the initial raw casting, record deviations, and close agreed tooling corrections.
4
Production & acceptance
Control material, casting condition, dimensions, testing, preservation, and packing.
Casting records
Evidence buyers can approve before repeat production.
Keep the raw-casting requirement, material condition, sample result, and acceptance criteria in one traceable production record.
Raw casting drawing
Identify parting, cores, casting dimensions, machining stock, and revision status.
Material and heat treatment
Record the agreed grade, condition, reports, and project-specific testing scope.
First-article results
Compare the first casting with agreed dimensions and close tooling corrections before repeat work.
Acceptance and repair criteria
Define visual, dimensional, NDT, and repair requirements instead of deciding them after production.
Frequently asked questions
Casting questions before tooling release.
Final requirements should be tied to the drawing, material specification, purchase order, and approved casting record.
Can you quote casting only?
Yes. The quotation can cover raw castings only or add heat treatment, machining, finishing, inspection, and export packing as defined items.
How do you choose sand or investment casting?
The decision depends on alloy, size, wall thickness, internal geometry, detail, quantity, surface expectation, and tooling economics.
Can you review a sample or worn part?
Yes. A sample can start feasibility review, but material, critical dimensions, quantity, and acceptance requirements still need confirmation.
What should a casting RFQ include?
Send the drawing or model, material grade, quantity, annual demand, machined surfaces, treatment, test scope, and delivery requirements.
Casting RFQ
Send the casting drawing, material, quantity, and finishing scope.
Share the strongest part evidence available. We will review geometry, cores, alloy, tooling, stock, treatment, inspection, and the practical quotation route.