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OEM/ODM Plastic Product Development & Manufacturing

Hongqing is a one-stop OEM/ODM manufacturer in Dongguan, China. Have drawings? We build the molds, mold the parts, finish, assemble and ship. Only an idea? Our in-house R&D team starts from industrial design, mechanical and electronics engineering and carries it through to mass production. One team, one factory, so you never have to coordinate a design agency, a mold shop, a molder and an assembler separately.

OEM and ODM: wherever you start, we take it from there

Both models are delivered by Hongqing's own team. The only difference is the starting point.

OEM: you provide drawings or a sample

For brands and engineering teams whose design is complete and who need a reliable manufacturing partner. We run a DFM (design for manufacturability) review on your 2D/3D drawings, advise on wall thickness, draft angles, snap-fits and gate locations, then build and trial the mold in our own mold shop. After sample approval we move into injection molding, surface finishing, assembly and shipping.

ODM: you provide an idea or a product brief

For customers who have a product concept, competitor references, sketches or a requirements list but no drawings yet. Our R&D team of industrial designers, mechanical engineers and electronics engineers handles concept evaluation, industrial design, mechanical design and electronics integration, validates the design with 3D-printed and CNC prototypes, and only then builds the mold, so manufacturability is designed in from day one.

OEM process: from drawings to shipment

  1. Drawings and requirements

    2D/3D files, material requirements, color and surface requirements, estimated annual volume, and any certification or test standards you need to meet.

  2. DFM review and quotation

    Our engineers review wall thickness, draft angles, snap-fits, screw bosses and gate locations, then propose the mold solution, material options and a quotation.

  3. Mold design and manufacturing

    In-house mold shop with Sodick EDM, Sodick wire EDM and Makino high-speed machining centers; machining accuracy ±0.01 mm; molds up to 1.5 m.

  4. Mold trial and sample approval

    Mold trials (T1–Tn) on 80T–1300T presses; samples shipped for dimensional, cosmetic and assembly approval, with mold adjustments where needed.

  5. Injection molding production

    90+ injection molding machines, 40+ at 300T and above, 7 two-shot machines and vertical presses for insert molding; ABS, PC, PP, PA, POM, TPE, TPU and other engineering plastics.

  6. Surface finishing

    2 robotic spray painting lines, screen printing, pad printing, UV printing, laser marking, conductive coating and heat-staked inserts.

  7. Assembly, testing and shipping

    5 clean assembly lines handle insert assembly, complete product assembly, functional testing and packaging, shipped to your delivery schedule.

Injection Mold ManufacturingInjection MoldingSurface Finishing & Secondary OperationsProduct Assembly

ODM process: from idea to mass production

Compared with OEM, ODM adds five development stages before tooling. Everything after that is identical.

  1. Concept evaluation and product definition

    We map the use case, target market, competitors and cost range, and define the feature list and key dimensions.

  2. Industrial design

    Form, color and material concepts delivered as renderings to lock in the overall look.

  3. Mechanical design

    Housing split lines, snap-fits, screw bosses, ribs and assembly method, designed with injection molding feasibility in mind.

  4. Electronics layout and integration

    Fitting the PCB, battery, buttons, connectors, display, lighting, speaker and sensors into the mechanical design.

  5. 3D-printed / CNC prototype validation

    Prototypes validate appearance, structure, assembly and user experience; the design is refined before tooling starts.

  6. Tooling, molding, finishing and assembly

    From here the process is the same as OEM: in-house mold making, trial and approval, injection molding, surface finishing, clean assembly and shipping.

Full product development processProduct Design & EngineeringRapid Prototyping

8 stages from idea to mass production

  1. 01Concept evaluation and product definition
  2. 02Product Design & Engineering
  3. 033D-printed / CNC prototypes
  4. 04In-house mold making (±0.01 mm)
  5. 05Mold trial and sample approval
  6. 06Injection molding (90+ presses)
  7. 07Surface finishing (2 robotic painting lines)
  8. 08Clean-room assembly & shipping
  • ISO 9001
  • ISO 14001
  • IATF 16949
  • BSCI · Sedex
  • 18-person QC team
  • In-house mold shop, ±0.01 mm
  • 90+ injection molding machines
  • 20,000 m² factory

Hongqing manufacturing at a glance

  • 20,000 m²Factory in Qiaotou, Dongguan
  • 90+Injection molding machines, 80T–1300T
  • 40+Presses at 300T and above
  • 7Two-shot injection molding machines
  • ±0.01 mmMold machining accuracy
  • 1.5 mMaximum mold size
  • 2Robotic spray painting lines
  • 5Clean assembly lines
  • 18Quality control staff

R&D Team

ODM projects are handled by Hongqing's own R&D team, not outsourced to a design agency. The team includes Red Dot Design Award-winning designers.

  • Industrial designersProduct positioning, form, color and material (CMF), renderings
  • Mechanical (structural) engineersHousing structure, snap-fits and assembly, mold feasibility, DFM
  • Electronics engineersElectronics solution, PCB layout and mechanical integration, functional validation
  • Tooling and molding engineersMold design, trial optimization, materials and process parameters

Industries & Product Experience

The products we have developed and manufactured span many industries. Requirements differ from one industry to the next, but the process is the same: from concept to mass production, in one factory.

  • Personal CareElectric toothbrushes · CombsWaterproof sealing, skin-safe materials, two-shot molding, high-gloss and painted finishes
  • Smart Home & ElectricalTimer switches · Smart timers · LED lightsFlame-retardant PC/ABS, button feel, snap-fit assembly, light guides and diffusers
  • HVAC & Thermal ControlTRV (thermostatic radiator valves) · Temperature sensors · Heating elementsHeat-resistant materials, dimensional accuracy, sensor and metal insert molding
  • Pet ProductsComplete pet products and plastic componentsBite-resistant durable materials, easy-to-clean structures, complete product assembly
  • Consumer Electronics & Accessories3C device enclosures · Stands & mountsThin-wall precision enclosures, conductive EMI coating, finishing and printing
  • Appliances · Automotive · IndustrialAppliance parts · Automotive components · Industrial equipment housingsMedium and large molds, IATF 16949 system, stable high-volume delivery

Brands & Customers We Have Served

A selection of the customers and brands we work with.

Logos of Hongqing customers and brands

Case Studies

Case studies are being prepared. If you would like to see experience on products similar to yours, contact us and we will share references under confidentiality.

Confidentiality & IP

We understand how sensitive design data is during development. Raise NDA signing, the permitted use of your drawings and 3D files, and mold ownership when you enquire, and we will confirm each point with you.

Frequently Asked Questions

What is the difference between OEM and ODM, and which should I choose?

With OEM you supply drawings or a sample and we manufacture to them. With ODM you supply an idea or a brief and we design, engineer and then manufacture. Choose OEM if your design is complete; choose ODM if you have no drawings yet or want the manufacturer to design for manufacturability. Tooling, molding, finishing and assembly are identical in both models.

What do I need to send for a quotation?

OEM: 2D/3D drawings (STEP, IGS, DWG, etc.), material and color requirements, surface requirements and estimated annual volume. ODM: your product idea or brief, reference images or competitor products, target market and cost range, and the features you expect. Incomplete information is fine to start with; we will tell you what else we need.

Can you do design only, without manufacturing at Hongqing?

Yes. Design and manufacturing can be commissioned separately. That said, when the same team designs and builds the mold, manufacturability issues are solved at the design stage and later mold rework is reduced, which is why most customers choose the one-stop route.

What kinds of products have you developed?

Electric toothbrushes, combs, timer switches, smart home timers, LED lights, TRV thermostatic radiator valves, temperature sensors, heating elements, pet products, stands and mounts, 3C device enclosures, as well as appliance parts, automotive components and industrial equipment housings.

What is your minimum order quantity?

With more than 90 injection molding machines from 80T to 1300T, Hongqing handles sample runs and small-batch pilot production as well as stable high-volume delivery. The minimum order depends on the product structure and mold solution; contact us for details.

How long does development take?

Lead time depends on product complexity, the number of molds and the surface processes involved. We provide a stage-by-stage schedule after the concept evaluation. Contact us with your product information for a specific timeline.

Which file formats do you accept?

3D: STEP, IGS, X_T, STL. 2D: DWG, DXF, PDF. References: images, videos and physical samples are all welcome.

Send us your drawings or your idea

We reply within 1 business day and tell you what is needed next.

Request a Quote[email protected]

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