Custom Injection Molding. Prototyping to Mass Production

High-quality plastic parts, from prototype tooling to full-scale mass production. T1 samples delivered in as fast as 2 weeks, with no minimum order quantity (MOQ).

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100,000+ Parts Made

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ISO 9001:2015 Certified

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No Minimum Order Quantity (MOQ)

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Get an Instant Injection Molding Quote

Upload your CAD file for instant pricing and DFM feedback.

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Drag & drop CAD files hereSTEP, STP, STL, IGS, IGES, PDF, ZIP — up to 50MB

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Material Options for Injection Molding

Over 100 engineering and commodity resins in stock, with custom compound and masterbatch matching available on request.

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Commodity Plastics

Acrylonitrile Butadiene Styrene (ABS)

Polypropylene (PP) & Polyethylene (PE/HDPE/LDPE)

Polystyrene (PS) & High Impact Polystyrene (HIPS)

Surface Finishes & Post-Processing

Surface treatment options adhering to SPI standards to meet functional and cosmetic requirements.

SPI Mold Finishes

SPI GradesSPI-A, SPI-B, SPI-C, SPI-D

Finishing LookHigh Gloss, Semi-Gloss, Matte, Textured

Surface PolishDiamond Polish, Fine Grit, Sandblasted

Custom Textures

Mold-Tech TexturesStandard MT grain & automotive leather textures

Bead BlastingUniform satin matte & non-glare cosmetic finish

Custom EDM TexturesPrecision spark erosion & bespoke micro-reliefs

Secondary Finishing Services

Surface DecorationPad printing, silk screening & laser engraving

Assembly & InsertsUltrasonic welding & heat-stake threaded inserts

Protective CoatingsEMI/RFI shielding, spray painting & UV topcoats

Injection Molding Quality Control

Quality gets built in at mold design, not inspected in at the end. Cross-team DFM reviews and in-process controls hold first-pass yield at 90% or better across every production run.

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Mold Design & Flow SimulationMold flow simulation and pre-production checks catch defects before steel is cut. Engineers optimize gate location, material flow, and cooling layout for consistent fill on every cavity.

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First-Article Inspection (FAI)CMM measurements against 3D CAD verify critical tolerances, part weights, and cosmetic requirements before volume approval is granted.

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In-Process & Pre-Shipment ChecksEvery batch is measured against your drawing with CMM and colorimeter data before it ships — dimensions to ±0.02 mm, cosmetics, and functional fit all included in the report.

Plastic Injection Molding Services for Custom Parts

ENSTARK takes your part from a handful of prototype units to full production runs on the same tooling philosophy, with T1 samples ready in as fast as 2 weeks. Our China-based facilities run 90 to 830-ton presses, so small precision components and large structural housings both stay in-house.

Precision mold tooling, overmolding, and insert molding all run through the same DFM review before steel is cut, so bond compatibility and wall thickness are checked once rather than per process. One partner across design, tooling, and production means fewer handoffs, tighter part consistency, and a clearer path to scaling volume.

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How Does ENSTARK Injection Molding Process Work

Our simple and efficient injection molding process covers everything from prototyping to final product delivery.

Upload CAD file

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Start by choosing your preferred manufacturing process, then upload your design file.

Get a Quote

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Select materials, surface finishes, and shipping options. Receive an online injection molding quote and manufacturability feedback in one day.

Review T1 Sample

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We produce a T1 sample for your approve. Check every detail to match your specifications. This step usually takes two weeks.

Production Begins

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After approving the sample, we move to full-scale production, maintaining high standards of quality and precision.

Delivery

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We ship your custom injection molded parts from our China injection molding facilities to your location, ready for immediate use.

Ready to Start

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Start your injection molding project with ENSTARK. Experience efficiency like never before!

Injection Molding Manufacturing Network

ENSTARK injection molding network combines 50 advanced machines capable of 90 to 830 tons with experienced project managers to handle projects of any size or complexity. We produce plastic molded prototypes and production parts with global shipping from China’s injection molding supplier.

50+Machines Set

120+Countries & Regions Served

20k+Customers Worldwide

Global Injection Molding Manufacturing Network Map

Precision Vacuum Forming Services

Precision Overmolding Services

Low Volume Injection Molding Services

Precision Insert Molding Services

Injection Mold Tooling Services

Injection Molding Capabilities

Our injection molding services cover every stage, from design to delivery. We produce prototypes and large-scale parts with tight tolerances, certified quality, and quick lead times for global customers.

Image (Digital caliper measuring a precision machined part)

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StandardsDescription

Maximum Part Size1,200×900×400 mm

Minimum Part Size5×5×5 mm

Part to Part Repeatability±0.05 mm

Minimum Wall Thickness0.6 mm

Machine Tonnage Range50T – 1200T

Shot Size1 oz – 120 oz

Surface Finish QualitySPI-A2 to SPI-D3

Standard Lead Times2–4 Weeks (Production Tooling)

Rapid Tooling Lead Time7–10 Business Days

Certified Quality StandardISO 9001:2015 & IATF 16949

Inspection EquipmentCMM, Optical Comparator, 3D Scanner

Design OptimizationFull DFM Report Provided Free

Applications of Injection Molding

Injection molding is used to produce a wide range of consumer, industrial, and medical products. Manufacturers favor it for its versatility: it produces parts at high volume with tight tolerances, ready for assembly straight from the mold. Whether the design is simple or complex, it delivers a consistent, high-quality result.

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Advantages of Injection Molding

✓High part-to-part consistency

✓Low per-unit cost at volume

✓Wide material & resin selection

✓Complex single-shot geometries

Disadvantages of Injection Molding

•High upfront tooling costs

•Design limitations

•Longer lead times

•Not cost-effective for low-volume runs

Frequently Asked Questions

Injection Molding Blueprint & CAD Review

What is the minimum order quantity (MOQ) for injection molding?

We have no MOQ for low-volume production or bridge tooling runs. You can order as few as 25 to 100 parts using prototype aluminum tooling, or scale to hundreds of thousands of parts with hardened steel production molds.

What's the typical lead time for T1 samples and production parts?

Can Enstark help optimize my CAD design for injection molding (DFM)?

What materials can be used for injection molding?

What surface finishes are available for molded parts?

How does Enstark guarantee tool life and part quality?