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Explore our state-of-the-art dual-color and multi-material tool designs built to meet stringent US manufacturing standards.
The United States manufacturing landscape is undergoing a massive technological shift. Industries from Detroit's automotive hubs to Silicon Valley's consumer electronics corridors and Boston's medical device clusters are increasingly demanding advanced fabrication techniques. Among these, Two Colour Injection Moulding (also known as 2K, double-shot, or multi-shot moulding) has emerged as a cornerstone technology.
By injecting two different materials or colors into a single mould cavity in a single cycle, US manufacturers can eliminate post-moulding assembly costs, enhance structural integrity, and optimize product aesthetics. The integration of hard plastics (like Polycarbonate or ABS) with soft-touch elastomers (like TPE or TPU) is now standard for ergonomic grips, water-resistant seals, and multi-functional components.
As smart devices, electric vehicles (EVs), and wearable medical technologies continue to dominate the US economy, the reliance on high-precision dual-color toolmakers has never been greater. Ningbo Jinlong supplies this demanding market with export-grade tooling that aligns perfectly with domestic US production requirements.
Precision Engineering Meets Global Manufacturing Excellence
Founded in the heart of China’s manufacturing growth triangle in Yuyao, Zhejiang Province, Ningbo Jinlong Electric Appliance Co., Ltd. is a premier high-tech enterprise specializing in two core industrial pillars: Professional Mold Manufacturing and Advanced Home Appliance R&D.
Spanning a massive 68,000-square-meter modernized facility with $16 million USD in fixed assets, we are strategically positioned near the Ningbo Port and International Airport, ensuring seamless global logistics and supply chain efficiency for our partners in the United States and worldwide.
We deliver integrated solutions from custom precision tooling to high-volume end-product assembly.
Our tool-room is the foundation of our quality. With a dedicated 5,000-square-meter precision workshop, we combine Swiss, Japanese, and American technology to deliver export-quality tooling for the world’s most demanding industries.
As a global leader in vacuum cleaner and sanitization technology, we operate 18 automated assembly lines with a robust annual capacity of 4 million units. Our R&D team sets trends by holding global invention patents for unique technologies.
Unlocking complex geometries, multi-material bonding, and high-volume efficiency for US industries.
For US-based product designers and procurement managers, choosing a two-colour injection moulding supplier involves finding a partner who understands the chemistry of polymer bonding. In 2K moulding, the chemical compatibility between the first-shot substrate and the second-shot overmould is vital. Our engineering team utilizes advanced Moldflow simulation software to predict molecular bonding, shrinkage, and thermal performance before steel is cut.
We design and manufacture complex 2K tools featuring rotary platens, index plates, core-back mechanisms, and robotic transfer setups. By leveraging high-speed CNC machining (up to 42,000 RPM) and Charmilles EDM technology, we hold tolerances as tight as ±0.01mm. This level of precision prevents flashing at the boundary where the two distinct polymers meet, ensuring clean shut-offs and pristine cosmetic finishes.
We combine world-class engineering, strict quality standards, and cost-effective production to support your supply chain.
Backed by a 30+ member R&D team and an annual investment exceeding $1.5 million USD, we secure new technological breakthroughs and patents every year.
Our 60+ member Quality Assurance team manages an internal testing facility capable of ROHS environmental measurement. We are fully compliant with ISO 9001, ISO 14001, ISO 45001, and IATF 16949.
Our products meet the strictest international standards, including GS, CE, UL, CCC, ROHS, and WEEE, ensuring smooth market entry for our clients.
From initial mold design and trial to mass injection molding and final assembly, we provide a "one-stop" manufacturing service that reduces lead times and costs.
Internal production of core products, high efficiency, with 100% facilities and equipment owned in-house.
Adherence to ISO: 1998 and TS: 2009 standards. Ensuring rigorous Quality Control at every stage of fabrication.
Efficient project management and follow-up, backed by strong mold making capacity to meet tight US launch schedules.
Established in 1985, our tool workshop brings 30 years of specialized experience in complex mold making.
More than 10 high-speed CNC machines (up to 42k RPM), alongside Charmilles electric discharge machines and wire cutting tools.
Over 30 dedicated engineers utilizing Pro/UG, CAD, CATIA, and advanced Moldflow analysis software.
How we bridge the distance to deliver rapid, reliable tooling solutions directly to the United States.
Operating as an offshore manufacturing partner for the United States requires more than just technical skill; it demands robust logistics and communication channels. Ningbo Jinlong has optimized its operations to cater specifically to North American OEMs and Tier-1 suppliers. Our proximity to the Ningbo Port—one of the busiest and most efficient shipping hubs in the world—allows us to coordinate ocean freight shipments to major US ports like Los Angeles, Long Beach, Newark, and Savannah with ease. For time-critical prototype tooling, we offer rapid air freight options that deliver moulds to your facility in days.
Furthermore, our engineering team is accustomed to working within US time zones to conduct design reviews (DFM) and progress updates. We provide detailed weekly progress reports, complete with photos and video footage of mould trials (T1, T2, T3), ensuring you have complete visibility over your project without needing to travel. By offering DDP (Delivered Duty Paid) shipping solutions, we handle all customs clearance, duties, and inland logistics, delivering tools directly to your manufacturing floor in the United States.
Explore our full catalog of high-precision single and multi-shot injection moulds designed for global distribution.
