From part design to approved tooling
Custom Injection Mold Manufacturing
Build the right mold for your next stage of production. YIOT manufactures custom injection molds for prototype validation, small runs, and ongoing production, with engineering decisions tied to your resin, part requirements, receiving machine, and purchasing plan.
Choose a tooling-only project for transfer to your molding facility, or keep tooling and injection molding with YIOT. Our team supports both routes from technical review through trials and agreed delivery.
Request a Mold Quote Compare tooling routes
Choose your starting point
Choose Your Tooling Route
Rapid and prototype tooling
For functional testing, assembly checks, design validation, and smaller production commitments. Select a practical mold construction around what you need to learn and how the design may change.
Explore rapid toolingProduction tooling
For a stable design and a repeatable manufacturing program. Review cavitation, runners, cooling, wear resistance, and service access against demand and the target molding operation.
Explore production toolingThe route is a starting point for specification. An early design may need molded samples to resolve fit or material questions; an approved design may justify more attention to capacity and operating cost. Your forecast, tooling budget, resin, and revision risk help determine the appropriate construction. We discuss those requirements together before selecting a mold material or committing to a layout.
From Part Design to a Production-Ready Mold
An injection mold controls the cavity shape, melt entry, cooling, and release of the molded part. A useful tooling specification connects these functions to the drawing: critical dimensions, cosmetic faces, assembly interfaces, resin grade, and inspection method.
YIOT brings more than 24 years of manufacturing experience to this work. Our Dongguan facility covers 12,000 m², with 49 automated injection molding presses ranging from 90 to 1,200 tons. Tool trials and molding plans are matched to the project requirements and available equipment.
Share 3D data, controlled drawings, the intended resin, forecast demand, and your delivery route. We review the initial quotation inputs first; the scope and timing of full design for manufacturing (DFM) are agreed for the project. An NDA can be arranged as needed. Moldflow analysis is an optional engineering activity when flow, filling, or other questions justify it.
In-house moldmaking
In-House Mold Manufacturing
Our moldmaking operations include CNC machining, EDM, wire cutting, grinding, fitting, and polishing. The manufacturing sequence follows the component geometry, material condition, and finish requirements. EDM addresses features that are difficult to reach with a cutting tool; fitting establishes the working relationships between mold components.
Machined mold component accuracy and molded part tolerances are different requirements. Part dimensions also depend on resin shrinkage, cooling, geometry, and processing conditions. We identify critical features before manufacture and use trial samples to assess the molded result.
Polishing and texture decisions should follow an approved appearance reference rather than a broad description alone. Specify the visible faces, permitted gate and ejector marks, and areas requiring special care. The agreed finish then guides material selection, surface preparation, and sample review.
Make the tooling decisions before cutting steel
Cavities and runners
Compare single and multiple cavities against demand, part size, balance, and machine capacity. Cold and hot runner options have different investment, material handling, and maintenance implications.
Side actions and release
Review undercuts, slides, lifters, draft, and the ejection sequence together. Gate and ejector locations should respect functional surfaces and visible areas.
Inserts and service access
Consider replaceable inserts for difficult features, wear areas, or expected revisions. Keep cooling connections and service points accessible within the mold layout.
Choose materials and finishes around the application
| Option or requirement | What to consider |
|---|---|
| Aluminum tooling | A candidate for selected rapid tooling projects; review resin, geometry, loading, finish, and expected use before selection. |
| Prehardened steel | Balances machinability with the needs of suitable prototype, bridge, or production applications. |
| Hardened or specialized steel | Evaluate wear, corrosion, toughness, heat treatment, and repair needs for the specified resin and operating conditions. |
| Polished or textured surfaces | Define the appearance standard and approval reference. Steel selection, preparation, draft, and part geometry affect the achievable result. |
A clear sequence
Our Mold Manufacturing Process
Review the request
Confirm files, resin, quantity expectations, critical features, destination, and quotation assumptions.
Agree the tooling concept
Select the route, cavity arrangement, runner approach, material, and receiving machine requirements.
Complete DFM
Resolve draft, wall sections, gate locations, undercuts, and other manufacturing questions with your team.
Approve the mold design
Review the layout, cooling, ejection, and interfaces before the agreed manufacturing release.
Manufacture components
Machine and finish cores, cavities, electrodes, and supporting components to the approved design.
Fit and assemble
Check movement, mating surfaces, cooling circuits, and mold operation before trial.
Trial and correct
Review samples and agreed inspection results; address findings through documented corrections.
Approve and deliver
Confirm acceptance, documentation, packing, and transfer or the start of YIOT molding.
Fit the tool as a working system
Core and cavity fit, slide movement, ejection, and connections are reviewed together. Assembly checks help expose interference and access issues before sampling.
Trial, Inspection and Delivery
Trials connect the mold to the molded part. Define dimensional inspection, appearance review, sample quantities, and acceptance criteria in advance. For transfer, agree the receiving machine interfaces, delivery records, and commissioning responsibilities before shipment.
Record findings against the approved drawing revision so corrections and acceptance are traceable. Where an assembly test or customer review is required, confirm who performs it and which samples are used. Agree the distinction between part approval and authorization to ship the tool. This gives both teams a clear basis for the next step.
Tool transfer requires early coordination with the receiving molder. Machine dimensions, nozzle and ejection interfaces, cooling fittings, electrical connections where applicable, and local tool standards belong in the design review. For molding at YIOT, agree the resin supply, inspection plan, order quantities, and handling requirements alongside the tooling program.
Tooling examples from YIOT
These project examples show the part geometry and tooling context behind the engineering discussion.
Appliance & Waterproof Plastic Molds
A published tooling example for appliance and waterproof plastic applications. Review the part geometry, joining features and sealing requirements when defining your own mold and sample acceptance.
View tooling example →
Custom Desktop Plastic Injection Mold
This published custom mold example provides a reference for discussing mold construction. Part material, cosmetic faces, cavity count and inspection requirements are defined against each customer’s drawings.
View tooling example →Continue with DFM & Engineering, review our Facility & Quality, or browse more Project Examples.
Injection mold manufacturing questions
What do you need for a quotation?
Send 3D CAD, available 2D drawings, resin grade, expected demand, cosmetic requirements, and the tooling destination. Identify critical dimensions and any receiving machine standards.
Can you supply only the mold?
Yes. We support tooling-only supply and transfer, as well as tooling followed by injection molding at YIOT. Agree the delivery scope and machine compatibility during review.
How do I choose rapid or production tooling?
Start with design maturity, validation needs, resin, expected use, and production economics. We compare construction options with you before confirming the route.
When are samples approved?
Trial samples are reviewed against the agreed dimensional, functional, and appearance requirements. The correction and approval sequence follows the project plan.
What determines the mold build schedule?
Mold size, complexity, steel, purchased components, surface finish and revision cycles affect the schedule. We confirm timing after technical review, with design and sample approval milestones agreed before manufacture.
Can we arrange an NDA and define mold ownership?
An NDA can be arranged before sharing sensitive files. Mold ownership, use, storage and transfer terms are defined in the commercial agreement, together with the agreed delivery scope.
Start with your part and production requirements
Send your files and tell us where the mold will run. With complete inputs, YIOT provides a quotation response within 24 hours. Detailed engineering activities and the tooling schedule are agreed after review.
Send your tooling inquirygerry.li@aiyiot.com · NDA available when required.