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Custom Plastic Injection Molding Services

We manufacture plastic parts in our ISO 9001:2015 certified factory. DFM review, material selection, sampling and mass production — all completed in-house on 45 injection molding machines from 90T to 800T.

ISO 9001
Certified Quality System

CMM · Optical · Color inspection in-house

45 Machines
90T – 800T Clamping Force

Small precision to large structural parts

15,000 m²
Factory Under One Roof

Mold making + molding + inspection together

24h Response
DFM Feedback & Quotation

Send Your Drawing →

Injection molding factory workshop with CNC machining centers in China
Capabilities

Injection Molding Technical Parameters

Hua Zi operates 45 injection molding machines covering a full tonnage range from 90T to 800T, allowing us to produce small precision components as well as larger structural plastic parts.

Injection molding machines45 units
Clamping force range90T – 800T
In-house CNC machining centers20 units
Mold design & DFMIn-house engineering team
Quality systemISO 9001:2015
Precision inspectionCMM, image measuring instrument, calipers, gauges
Appearance controlColorimeter, standard light source
Part size / weightDepends on geometry and clamping force; confirm with DFM review
Project scopeOEM/ODM, DFM, material selection, sampling, mass production
Materials

Plastic Materials We Can Process

Material selection drives part performance, mold design and unit cost. Our engineers recommend materials before tooling.

Engineering Plastics

ABS, PC, PC/ABS, PA6/PA66, POM, PMMA, PET/PBT for structural, precision and appearance parts.

Commodity Plastics

PP, PE, PS and general-purpose grades for economical consumer and packaging products.

Elastomers & Flexible Materials

TPE and TPU for soft-touch surfaces, seals, gaskets and flexible components.

Material note: material availability should be confirmed before tooling for your target quantity. For special grades or customer-specified resins, our team will confirm material availability and drying requirements during the RFQ process.
Industries

Industries We Manufacture For

Our injection molding experience covers demanding industries with different material, precision and quality requirements.

Home Appliances

Air conditioner housings, small appliance enclosures and structural parts. We run mass production cycles for appliance housing weekly — snap-fit assemblies, rib-reinforced panels, and high-gloss cosmetic surfaces are standard in our factory. Dimensional drift control during long production runs is monitored with in-process inspection at regular intervals.

Medical Devices

High-precision medical plastic components produced under controlled process conditions. We manufacture small-batch medical housings and device enclosures on our injection machines. DFM review for medical parts is stricter — tighter tolerance bands, polished mold surfaces to SPI A-2 or better, and documented material traceability. We process medical-grade ABS, PC, and PP on dedicated production runs with enhanced cleanliness protocols.

LED Lighting

Lamp bodies, lenses and heat-dissipation plastic structures. We injection-mold LED housings from PC and PMMA — materials that balance optical clarity with thermal stability. Gate placement and cooling channel design are critical for lens parts; our mold design team optimizes both before cutting steel. Multi-cavity molds for lighting components run on 200T–400T machines with consistent cycle times across shifts.

Consumer Products

Daily-use plastic products from prototype to high-volume production. We produce consumer goods across our full 90T–800T machine range — from small precision components to large structural enclosures. Color consistency, surface texture, and assembly fit are verified with in-house colorimeter and CMM inspection before every production release.

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Process

How Our Injection Molding Process Works

A clear engineering workflow reduces risk, cost and time for every custom plastic part project.

1

Inquiry & DFM Review

Send drawings or samples. Our engineers check design, recommend material and identify molding risks.

2

Mold Design & Manufacturing

In-house mold design, CNC machining and fitting deliver a production-ready tool.

3

Sampling & Approval

Mold trial samples are inspected, measured and approved before mass production begins.

4

Mass Production & QC

Production runs on 45 machines with in-process inspection and final quality checks.

Quality Assurance

Quality Inspection & Consistency

We run a controlled injection molding process and inspect parts with in-house measurement equipment to maintain consistency across production batches.

Quality systemISO 9001:2015
MeasurementCMM, image measuring instrument, calipers, gauges
Appearance controlColorimeter, standard light source
SamplingFirst article inspection before volume production
Why Hua Zi

Mold + Molding in One Factory

When one factory controls both mold quality and injection molding parameters, communication is faster, defects are easier to trace and production is more predictable.

  • One accountable engineering team from DFM to delivery
  • Faster sampling because mold and machine are in the same plant
  • Stable process control with 45 machines across a wide tonnage range
  • Export documentation preparation for overseas customers
Cost & Lead Time

Injection Molding Cost Factors & Project Lead Time

Understand what drives plastic part cost and how project timing is confirmed before production.

What Affects Injection Molding Cost

  • Part size, geometry and wall thickness
  • Plastic material and special material availability
  • Mold complexity and number of cavities
  • Tolerance, surface finish and cosmetic requirements
  • Annual quantity and production release plan
  • Secondary operations, packaging and shipping terms

Lead Time & Project Schedule

  • RFQ review and DFM feedback
  • Mold design and manufacturing
  • Mold trial, sampling and customer approval
  • Mass production and pre-shipment inspection
  • Export packaging and logistics arrangement

Exact working days for each phase are confirmed after DFM review, because mold complexity and part quantity directly affect the schedule.

Planning tip: send a complete RFQ with 3D/2D files, material, target quantity and required surface finish. This gives you the most accurate injection molding cost and lead time in one response.
FAQ

Injection Molding FAQs

Common questions from OEM buyers before starting a plastic injection molding project.

Can you handle both mold making and injection molding for one project?

Yes. Hua Zi manufactures injection molds and produces molded parts in one factory. Mold design, mold manufacturing, sampling and mass production are all completed in-house. This eliminates the quality risk of splitting mold making and molding between different vendors.

What plastic materials can you process?

We commonly process ABS, PP, PC, PC/ABS, PA6/PA66, POM, PMMA, PE, PS, PET and TPE/TPU. Final material selection depends on your mechanical, thermal, chemical and cost requirements; our engineers confirm the best option before tooling.

What file formats do you accept for a quotation?

We accept STEP, IGES, STL, DWG/DXF and PDF files, as well as physical samples. A 3D model plus a 2D drawing with tolerances and material requirements gives the fastest and most accurate quotation.

What is your typical injection molding lead time?

Production lead time depends on mold complexity, material availability, quantity and current capacity. After DFM review we deliver a confirmed production schedule before you approve the order.

Do you send samples before mass production?

Yes. Mold trial samples are produced and inspected first. Samples are sent for customer approval with measurement reports before mass production begins.

Do you handle OEM/ODM plastic projects?

Yes. We manufacture from your drawings, samples or concepts. Our engineers handle DFM, material selection, mold design, production and export documentation for OEM/ODM projects — all in our factory.

What factors affect plastic injection molding cost?

The main cost factors are part size and geometry, plastic material, mold complexity, cavity count, tolerance and surface finish requirements, annual quantity, secondary operations, packaging and shipping. A complete RFQ helps us quote accurately.

What is included in your project lead time?

A typical project includes DFM review, mold manufacturing, sampling, customer approval and mass production. Exact lead time is confirmed after DFM review because mold complexity and quantity directly affect the schedule.

Can you handle packaging and export shipping?

Yes. We can prepare export packaging according to part fragility and shipping method. Shipping terms, documentation and delivery schedules are agreed before production.

Discuss Your Project with an Engineer

Get Your Injection Molding Quote Within 24 Hours

Send drawings or describe your product. We'll deliver DFM feedback, material suggestions and a quotation — direct from our factory.

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