KTM designs zinc die casting molds in Dongguan, coordinates qualified casting and finishing partners, and returns drawing-based assumptions, sample-approval steps, and one engineering contact for custom Zamak parts.
Tooling design led in Dongguan — drawing, datums, gates, and cosmetic zones set the mold brief
Hot chamber die casting for Zamak — machine, shot weight, alloy, and release assumptions are reviewed together
Finish route agreed before tooling — treatment, masking, thickness, and cosmetic sample follow the drawing
Zamak grades matched to the application — load, ductility, plating, temperature, and stability guide selection
One engineering contact — scope, approvals, partner roles, and quality ownership stay visible in writing
KTM is a zinc die casting manufacturer in China focused on die casting mold design, tooling, and engineering coordination. KTM leads zinc mold design from Dongguan and coordinates tool manufacture; qualified casting and finishing partners are selected per project. Your quote states the alloy, process, finish, inspection, and ownership assumptions.
KTM develops the zinc die casting mold design in Dongguan and coordinates tool manufacture. Steel, cavity strategy, slides, ejection, maintenance basis, and tooling ownership follow your target volume and part requirements.
KTM coordinates qualified hot chamber die casting partners for Zamak production. Machine fit, shot weight, gating, venting, release quantity, and process records are reviewed before production approval and first-article release documentation.
Chrome, nickel, powder coating, polishing, and other routes are scoped with the finish partner for review. Cosmetic zones, masking, thickness, color reference, adhesion, and corrosion tests are agreed before production release.
Inspection follows the drawing and agreed sample plan. DFM, first article dimensions, material records, and finish checks are supplied when included in the quote; critical features get defined datums and methods.
Start with the alloy, annual volume, critical dimensions, finish, and tooling ownership. A marked-up DFM explains the design choices before the zinc die casting quote is finalized.
Review Zamak grade options
Alloy selection connects load, ductility, plating, operating temperature, and dimensional stability. Zamak 3 is a common reference for general zinc die casting; Zamak 5 adds copper with a strength and ductility trade-off. Zamak 2, Zamak 7, and ZA-8 suit different tooling, plating, purity, or load cases. Use the table as a typical reference only; confirm the producer, standard, section, and test condition for your part.
Typical-reference sources: Eastern Alloys Zamak 3, Zamak 5, Zamak 2, Zamak 7, ZA-8, and the International Zinc Association alloy guide. Density entries marked * use the same Eastern Alloys typical-reference basis, about 6.6 g/cm³ for the Zamak grades and about 6.3 g/cm³ for ZA-8, for early mass and section comparison. Producer values come from test specimens and stated conditions; confirm the selected producer, standard, section, and test method. They are not part-property guarantees, design limits, or acceptance criteria.
| Grade | Composition (nominal) | Selection benefit | Trade-off to validate | Typical density* | Typical fit |
|---|---|---|---|---|---|
|
Zamak 3Common reference
|
Zn + ~4% Al + trace Mg | General reference for finish and detail | Validate load and finish sample | ~6.6 g/cm³* | General decorative and hardware parts |
|
Zamak 5
|
Zn + ~4% Al + ~1% Cu | Higher strength and hardness potential | Validate impact and ductility | ~6.6 g/cm³* | Load or impact; validate ductility |
|
Zamak 2
|
Zn + ~4% Al + ~3% Cu | Higher strength and hardness option | Validate aging and stability | ~6.6 g/cm³* | Higher-strength fittings and tooling |
|
Zamak 7
|
Zn + ~4% Al; lower Mg | Flow and finish-focused option | Confirm impurity and finish control | ~6.6 g/cm³* | Thin-wall or finish-sensitive cases |
|
ZA-8
|
Zn + ~8% Al + ~1% Cu | Higher-load option | Validate temperature, creep, and machine fit | ~6.3 g/cm³* | Selected higher-load hot-chamber parts |
What the spec sheet won't tell you.
Zamak 3
Standard reference for general zinc die casting. Check the specified producer grade, wall transitions, finish route, and lot documentation before approval.
Zamak 5
Typically marginally stronger and harder than Zamak 3, with lower ductility. Review load, forming, impact, and plating requirements together.
Zamak 2
Higher strength and hardness can come with long-term aging changes. Use it when the load case supports the trade-off and dimensional stability is defined.
Zamak 7
A Zamak 3 modification with lower magnesium and tighter impurity control; it may suit thin-wall or finish-sensitive cases. Confirm with sample and plating tests.
ZA-8
A higher-aluminum zinc alloy that can be hot-chamber die cast; check machine fit, section geometry, load, and environment before selecting it. When comparing a zinc route with an aluminum die casting mold, review mass, heat, geometry, and thermal requirements together.
Undecided? Send the drawing, annual quantity, load, environment, and finish. KTM will state the candidate grade, equivalent standard, rationale, and certificate requirement in the quote.
Request a written alloy recommendationWith the grade and drawing agreed, the zinc die casting process reviews parting line, uniform walls, gating, vents, ejection, and cosmetic zones. Most Zamak die casting uses the hot chamber process; machine, shot weight, cooling, and finish requirements determine the practical cycle.
A trial tool can use P20 or pre-hardened steel when geometry learning matters more than sustained duty. Confirm the intended alloy, gates, finish route, sample count, heat treatment, and replaceable wear parts before ordering.
Geometry and sample questions
Production tooling normally names H13, SKD61, or an equivalent grade plus heat treatment. Tie cavity count, cooling, ejector access, soldering risk, maintenance intervals, forecast shots, and inspection records to the quote.
Duty with traceable upkeep
Premium steel or inserts need a reason: cosmetic surfaces, moving actions, thermal duty, or sustained production. State heat treatment, replaceable wear features, inspection interval, maintenance owner, and shot-record basis; performance remains design and process dependent.
Cosmetic or sustained duty
Hot chamber is common for Zamak because the injection mechanism is immersed in the melt. In a hot-chamber cycle, a plunger drives molten alloy through the gooseneck and runner into the closed die; after solidification, the die opens and ejects the casting, then runners and flash are trimmed. Filling, cooling, and ejection must suit wall sections and cosmetic zones, so faster cycling is useful only when quality remains repeatable. Actual cycle time depends on wall thickness, shot weight, runners, cooling, ejection, and surface requirements; review the part and machine together. The IZA casting economics reference explains why no universal cycle or speed ratio should be promised. See the IZA design rules for distance- and size-dependent wall and draft references.
Send PDF drawings + ZIP CAD · assumptions returned in writing
Zinc die casting parts can be polished, plated, painted, powder coated, or passivated. Finish yield depends on alloy, gates, vents, parting marks, surface defects, rack or barrel route, coating thickness, and service environment. KTM coordinates qualified finish partners and documents the selected route.
Chrome, nickel & gold routes
Coating routes by environment
Surface preparation
Protection and pre-treatment
Send a physical sample and finish stack for plating; for paint or powder, add a RAL or Pantone reference. Include the cosmetic-zone map, required coating thickness, and corrosion or adhesion test. Porosity is not erased by plating; the substrate and pre-treatment must be approved on samples before production release.
Zinc die casting parts support hardware, mobility, electronics, and industrial assemblies when the alloy, finish, datums, and volume fit the application. Share the load, environment, cosmetic zones, and release plan so the recommendation stays specific.
Emblem plates, badge frames, trim bezels, mirror housings, and decorative end caps. Zamak 3 can support cosmetic work; Zamak 5 may fit a load requirement. Review mounting points, gate witness, plated zones, corrosion environment, and approval samples before selecting the alloy.
Lock cylinders, padlock bodies, door handles, zipper pulls, buckles, and furniture trim. Define wear, torque, impact, and plating requirements with the critical datums. The zinc die casting mold and finish route should be reviewed together. Confirm sample, packaging, and release assumptions.
Connector housings, USB shells, EMI frames, device mounts, and decorative end caps. Check section uniformity, ejection, grounding contact, cosmetic zones, and nickel or chrome limits before ordering zinc die casting components. Confirm interface datums, electrical contact surfaces, and release assumptions early.
Applications we also support: Cabinet handles, faucet trim, lamp bases, bushings, valve bodies, machinery fittings, and instrument enclosures — alloy and finish matched to load, environment, and program volume.
Quality evidence follows the drawing and the agreed inspection plan. A typical package may include a DFM review, casting simulation when justified, first article dimensions, material records, and finish checks. Confirm which documents, sample size, and acceptance criteria belong in your zinc die casting quote.
Send PDF drawings and ZIP-packaged CAD, plus annual volume, alloy or Zamak grade, critical tolerances, finish, tooling ownership, destination, and target date. NDA can be discussed before confidential files are sent.
Send PDF drawings and a ZIP package of CAD, with annual volume, release quantity, alloy preference, critical datums, finish, tooling status, destination, and target date. The first response lists assumptions and missing inputs.
Review uniform walls, ribs, draft, parting line, gates, vents, ejection, machining datums, and cosmetic zones. Casting simulation is a separate, conditional study for complex geometry; it is not a blanket promise for production.
KTM leads the mold design from Dongguan and coordinates manufacture. Steel, cavity count, slides, cooling, maintenance basis, and ownership are agreed in the quote. Progress evidence follows the agreed written project communication plan.
Raw T1 dimensions are checked against the drawing to approve tool geometry; a finished sample separately approves coating, cosmetic limits, and assembly fit. Record open items, owner, action, and revision before production release.
State whether KTM coordinates production through qualified casting partners or the mold is exported. Packaging, handover scope, spare parts, shipping terms, and future maintenance belong in the tooling quote before any production release.
Chrome, nickel, powder coating, polishing, or another route follows the approved specification. Check cosmetic zones, thickness or adhesion tests, critical dimensions, and traceability before lot release. Record lot, test method, result, and disposition.
Ship against Incoterm and packaging plan with reports listed in the quote. For a drawing change, identify revised features and date; for nonconformance, provide lot, measurements, photos, and containment request for written disposition.
PDF drawings + ZIP CAD · NDA discussed before confidential files
KTM began in 2006 as a toolroom and has more than 20 years of moldmaking and mold engineering experience; the About page records Ramon's path from mold engineer to ongoing design reviews. KTM leads zinc mold design from Dongguan and coordinates manufacture; casting and finishing are coordinated through qualified partners where required. For buyers comparing zinc die casting manufacturers, the value is a clear handoff from drawing to sample with assumptions visible.
KTM owns the drawing review, tooling decisions, partner coordination, and approval record. The quote names which operation is in-house and which is partner-run, so the handoff is visible. That gives sourcing and engineering one place to resolve assumptions before a zinc die casting production release.
A moldmaking background keeps parting line, gate, vent, ejection, shut-off, and machining datum decisions connected. KTM reviews how these choices affect fill, flash, distortion, trimming, and plating zones before steel is cut, then carries the agreed risks into T1 review with a documented action owner.
Zamak 3, 5, 2, 7, and ZA-8 are screened against load, ductility, temperature, plating, corrosion, and dimensional stability. The recommendation states the candidate grade and rationale, then calls for the producer certificate and application-specific validation where evidence is needed. Record test condition and supplier certificate.
Inspection language starts with the drawing revision, nominal size, datum, as-cast or machined state, instrument, sample size, and acceptance rule. CMM, gauge, material, finish, and corrective-action records are included when agreed, with porosity and plating risks handled as defined issues. Define escalation and corrective-action ownership.
Casting and finishing partners are selected for the part, machine, finish, and volume. KTM coordinates the technical brief, sample review, and release evidence, while the quote identifies the actual process owner. This keeps the buyer informed without implying every operation is performed in-house at KTM.
English RFQ communication can cover drawings, alloy, tooling, finish, packaging, Incoterm, and target date in one thread. Confidentiality can be discussed before files are sent. If the zinc route is a poor fit, KTM can explain the constraint and point to a different material path.
The next step is to share the drawing pack so KTM can state the alloy, tooling, partner scope, inspection, finish, and delivery assumptions in writing.
See how KTM quotes zinc die casting projectsA zinc die casting quote depends on the part, tool, process, finish, inspection, packaging, and shipment terms. The six drivers below make the assumptions visible so a buyer can compare a die casting mold and production route on the same basis.
Count cavities, slides, lifters, cooling, ejection, steel, and maintenance access before pricing tooling. State whether inserts or wear parts are replaceable, who owns the die, and which forecast supports the design. A zinc die casting mold quote should show steel and upkeep assumptions separately.
Zamak 3 is a general reference; Zamak 5 can add strength with lower ductility, while Zamak 2, 7, or ZA-8 suit other cases. Quote the candidate grade, producer, certificate, and validation plan. Include service temperature, impact, plating, and aging requirements before locking the alloy.
Ribs, transitions, undercuts, cores, gates, runners, finished weight, trimming, and machining datums drive metal use and cycle. Review runner-to-part balance and secondary operations from the drawing. State allowances and critical datums before selecting cavity count, shot size, or machine for the agreed forecast.
Plating needs rack or barrel planning, masking, thickness, and corrosion checks; paint or powder needs approved RAL or Pantone, coverage, and adhesion. Quote cosmetic zones, handling, sample approval, packaging, and rework rules. A finish master should govern release decisions for visible surfaces at approval.
Small releases repeat setup, inspection, packaging, and freight decisions, while a reliable annual forecast may support another cavity or stocking plan. Compare pilot and production scenarios with stated quantities, dates, storage, freight, inspection timing, and tooling ownership; the quote should show each schedule assumption.
Simulation is a separate study from DFM. Scope the question first: fill balance, air traps, last-to-fill location, or solidification risk. The quote should name CAD inputs, material assumptions, output images or report, timing, and whether any resulting tooling change is included for release.
A quote remains comparable while its drawing revision, alloy, finish, quantity, inspection, packaging, Incoterm, and tooling scope remain unchanged. Changes are reviewed and priced in writing; freight, taxes, new tooling, and rework are handled according to the agreed terms.
Cost questions surface the same way technical ones do — in a list. The RFQ below asks for the inputs needed to compare a zinc die casting route.
Twelve buyer questions about RFQ inputs, alloy choice, tolerance, walls, plating, porosity, tooling, partners, quantity, lead time, inspection, and confidentiality.
Have the drawing pack ready? The RFQ asks for the part, alloy, quantity, finish, tooling ownership, and delivery assumptions.
In Information, include the part and application, annual and release quantity, alloy or ‘recommend’, critical dimensions and datums, finish, tooling ownership, destination, packaging, and target date. Attach PDF drawings and ZIP-packaged CAD. Discuss an NDA before confidential files are sent; KTM returns written assumptions, sample-approval steps, and quote scope for tooling, casting, finishing, inspection, and shipping.
KTM's core work covers moldmaking, zinc die casting coordination, and custom plastic components that may need to fit the same assembly.
