Turnkey Solutions

Turnkey Plastic Injection Molding Services in China

End-to-end plastic injection molding services for production-ready programs.

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In-house tooling engineering and DFM feedback

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Contract assembly and packaging for ready-to-market products

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High-speed, robot-assisted injection presses up to 650 tons

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Insert-molding and over-molding for complex projects

Aerial view of Komaspec's plastic injection molding press floor

At Komaspec, we run custom plastic injection molding programs for OEMs and industrial brands who need a single contract manufacturing partner to handle production end-to-end. We oversee everything from tooling and custom injection molding services to quality management, assembly, and packaging.

Our services are engineered for ongoing production programs, with single-partner process ownership from design optimization to shipping. This turnkey contract approach significantly reduces supply chain complexity, cuts production lead times, and secures a faster time-to-market for your finished plastic products.

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Plastic Injection Molding Services at Komaspec

Reliable ongoing manufacturing designed for OEMs requiring process stability and global delivery across proven product layouts.

Komaspec is a contract manufacturer for clients with proven designs who need a single partner to run production end-to-end. We handle tooling, custom injection molding services, quality management, assembly and packaging across facilities operated by experienced international teams.

Our capabilities are built for ongoing production programs, with process ownership from tooling through shipment. This turnkey approach means less project complexity, shorter lead times, and a faster go-to-market for your finished plastic products.

Our Expertise

Custom Injection Molding Capabilities

From complex tooling geometries to fully automated high-volume production runs.

01 / TOOLING

Robust Tooling Process

Our robust process ensures long-term mold efficiency. Experienced engineers optimize tool designs for high-volume runs to reduce wear, completing detailed flow and structural analyses to prevent post-production defects.

02 / POLYMERS

Range of Materials

We process 15+ standard and engineering plastics. We source custom-engineered materials to match structural demands for complex part geometries and properties.

03 / ASSURANCE

Quality Control

Every batch undergoes strict post-molding inspections. Our industrial engineering team develops custom checking jigs and "go/no-go" gauges in-house to guarantee repeatable, high-accuracy verification.

04 / ASSEMBLY

Assembly Services

Full-service integration of plastic components with threaded inserts, custom sheet metal hardware, fasteners, and electronics.

Technician operating a Yizumi injection molding press on the production floor
End-To-End Manufacturing

Scale Your Custom Production

From highly detailed single components to complete electromechanical assemblies. Our global footprint and engineering teams ensure your parts are built to print, at the right cost.

Submit CAD for DFM Review

Plastic Molding Specifications

Engineered to meet the requirements of custom industrial, medical, and consumer programs.

Material

  • ■ Standard Plastics
  • ■ Engineering Plastics
  • ■ ABS, PP, PE, HDPE, PA6, PA66, PC/ABS
  • ■ PP/GF, PA/GF, PMMA, PC, uPVC, PVC
  • ■ PBT+PC
  • ■ TPU, TPE

Color

  • ■ Custom Colors
  • ■ Pantone Color Matching
  • ■ RAL Color Matching
  • ■ Master Batch
  • ■ Precision Color Calibration

Equipment

  • ■ Injection Press 130T
  • ■ Injection Press 160T
  • ■ Injection Press 190T
  • ■ Injection Press 200T
  • ■ Injection Press 300T
  • ■ Injection Press 320T
  • ■ Injection Press 650T

Secondary Processes

  • ■ Plastic Component Assembly Services
  • ■ Assembly Over Molding
  • ■ Insert Assembly
  • ■ Ultrasonic Welding
  • ■ Label Application

Surface Finishing

  • ■ Pad Printing
  • ■ Silk Printing

Plastic Material Options

Komaspec molds a wide range of standard and engineering plastics. The physical and functional values listed below represent typical figures for comparison and initial selection - actual final qualities depend on the specific grade and your processing conditions. View more here.

Material Tensile Strength (MPa) Elongation at Break (%) Surface Hardness
PC 55-75 100-150 RM 70
PMMA 80 2.5-4 M92-100
ABS V0 39 ≥10 R90-100
ABS 41-45 45 R100-110
PA66 82 ≥30 M89
PA6 78 ≥30 M82
PA66 +30%GFR 160-210 5 M100
PP 26 150-300 R80-100
PE 20-40 350 R50-70
HDPE 15-40 200-800 D60-73 Shore
Rows of injection molds stored on steel racks at Komaspec

Tooling & Mold Engineering

Komaspec engineers evaluate every tool for maximum production efficiency from the start. Our injection molds are designed specifically for high-volume runs - minimizing tooling wear, optimizing cycle times, and holding high dimensional consistency across high-volume production runs.

Rigorous Quality Management

Quality control operations run across the complete production lifecycle - from incoming materials analysis to final batch inspection. Injection process automation keeps output consistent shot to shot. Predefined molding parameters are locked into our machines to secure constant pressure, temperature, and shot velocity, avoiding manual operator errors.

Quality inspection lab where technicians measure and validate custom parts
Technician performing post-molding assembly

Post-Molding Assembly & Retail Packaging

Komaspec delivers comprehensive contract assembly services, combining molded plastic elements with metal parts, wire harnesses, PCBAs, and standard fasteners into a single finished product.

Why Choose Komaspec for Custom Injection Molding?

We operate full custom program oversight from raw materials to international transport.

In-House DFM Reviews

Our engineering team reviews designs for high-volume manufacturability, lowering risks and optimizing molding cycles.

Advanced Co-Molding

Deep engineering focus in insert-molding and over-molding, validating complex multi-material joints across a wide range of part designs.

Scalable Press Lines

Multiple high-speed lines running dynamically so our molding capacity scales immediately as your order sizes grow.

Full Project Ownership

Design refinement, tool manufacture, parts injection, final assembly, and international shipment are managed by a single partner - backed by Komaspec's manufacturing network across China, Vietnam, and Mexico.

20+ Years Contract Experience

We have manufactured complex products for global industrial programs, with documented process stability across long production runs.

Technical Communications

International account managers with pure engineering backgrounds. No details get lost in translation with the manufacturing floor.

How Plastic Injection Molding Works

A structured step-by-step workflow designed to deliver parts to specification on time.

01

CAD Submission

Client submits 3D CAD files and detailed component requirements.

02

DFM Assessment

Komaspec delivers detailed DFM reviews and tool layouts.

03

Quote Approval

Approval of mold tooling quote and final unit manufacturing pricing.

04

Tool Sourcing

Final design lock-in, tool sourcing, and core steel machining.

05

T1 Sampling

First-out-of-tool (T1) prototype injection run and layout checks.

06

FAI Approval

Sample presentation, adjustments, and First Article Inspection approval.

07

Mass Launch

Initiation of automated high-speed volume manufacturing.

08

In-Line QC

In-process inspections and parameter validation at locked intervals.

09

Assembly Loop

Post-mold secondary operations, hardware assembly, and retail boxing.

10

Logistics Ship

OQA Final inspection, packaging validation, and global logistics dispatch.

Industries & Applications

We manufacture plastic components across consumer and industrial applications, including IoT devices, household goods, mining, and agricultural equipment.

Industrial Equipment

Gears, housings, and structural fixtures for mining and agricultural applications.

IoT & Electronic Devices

Components for consumer IoT products, built to consistent dimensional and cosmetic standards.

Household Goods

Consumer products with cosmetic-grade surface finishes, ready for retail.

Electronics Enclosures

Dustproof and waterproof cases designed for direct electromechanical integration.

FAQS

Answers to common questions about our injection molding services in China.

Plastic injection molding is the most efficient way to produce plastic parts at high volume. The process works like this:

- Plastic pellets are melted down
- The molten resin is injected under pressure into a mold
- The resin cools inside and solidifies to the mold's interior shape
- The mold opens and the finished plastic part is ejected

The cycle then repeats rapidly and automatically. A wide range of geometries and surface finishes can be produced.

- Economies of scale - cost per part drops significantly at high volumes
- Complex parts can be molded relatively fast
- Fillers can be added to modify material properties
- Many resin types can be used, which means more design freedom

Injection molding requires a significant upfront investment in tooling. At higher volumes that cost is spread across many parts, so the cost per part becomes very low. This is why plastic injection molding is so effective for medium-to-high volume production.

We routinely work with PC, PMMA, ABS, ABS V0, PA66, PA6, PA66 with 30% glass fiber reinforcement, PP, PE, and HDPE, along with PC/ABS, uPVC, PVC, PBT+PC, and soft TPU/TPE grades. See our full plastic materials list for detailed properties.

Yes. We have experience with challenging end-use applications and support advanced processes including insert-molding and over-molding for parts that standard single-shot molding cannot address.

We provide DFM feedback and tooling engineering input during the pre-production phase, as part of the standard program workflow.

Yes. We can coordinate export shipment from our facilities based on your program requirements.

Yes. Please contact us at technicalsales@komaspec.com and we will be pleased to supply a reference list.

Start Your Program

Ready to Move Your Injection Molding Program to Production?

Work with a team running your injection molding program in China, from tooling and DFM through assembly and packaging - backed by Komaspec's contract manufacturing presence across China, Vietnam, and Mexico.

Full DFM Reviews

In-house checks before tooling

High-Tonnage Presses

Up to 650 tons

Set of precision-molded black plastic components

Your designs stay confidential — NDA on request

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