Injection molding is the backbone of modern manufacturing. From automotive components to medical devices, consumer electronics to industrial tools, countless products owe their form and function to this versatile process. As global demand for high-quality, cost-effective plastic components continues to rise, identifying the best injection molding companies becomes more critical than ever.
Whether you’re looking for top mould manufacturing companies in the world, or exploring the biggest injection molding companies for your next OEM project, this list offers insights into the leaders shaping the future of the plastics industry.
Top 10 Plastic Injection Molding Companies In World
Looking for reliable plastic injection molding companies? Here are 10 top companies known for quality, innovation, and trusted by global manufacturers.
Proto Labs (USA)
ProtolabsFounded: 1999
Headquarters: Maple Plain, Minnesota, USA
Background:
Proto Labs is a pioneer in digital manufacturing and on-demand production. It specializes in rapid prototyping and short-run injection molding with unmatched speed and efficiency. With fully automated quoting and manufacturing systems, Proto Labs serves clients in medical, aerospace, and consumer electronics sectors.
Strengths:
Ultra-fast turnaround (as fast as 1 day)
Online quoting and DFM analysis
Global facilities in the U.S., Europe, and Japan
Eco-conscious material selection
Jones Plastic & Engineering (USA)
Jones Plastic & Engineering (USA)Founded: 1961
Headquarters: Louisville, Kentucky, USA
Background:
With over 60 years of experience, Jones Plastic is one of the biggest injection molding companies in North America. Its high-volume production capabilities and expertise in engineering plastic parts have made it a trusted partner for major automotive and appliance manufacturers.
Strengths:
Strong engineering and toolmaking capabilities
Expertise in overmolding and gas-assist molding
IATF 16949-certified quality systems
Locations across the U.S. and Mexico
Zhongde (Beijing) Machinery Equipment (China)
Zhongde (Beijing) Machinery Equipment (China)Founded: 1983
Headquarters: China
Background:
Zhongde is a plastic molding manufacturer offering injection molding, mold fabrication, CNC machining, and compression molding under one roof. Serving clients in over 30 countries, the company combines traditional expertise with digital platforms to streamline global sourcing and manufacturing.
Strengths:
40+ years of manufacturing experience
Full-stack services: prototyping, tooling, mass production
Expertise in complex parts, overmolding, insert molding
Serves industries like automotive, medical, marine, and consumer electronics
Injection Molding Service
Zhongde provides custom injection molding services for plastic and rubber parts, from prototyping to production.
MSI Mold (USA)Founded: 2005
Headquarters: Shelby Township, Michigan, USA
Background:
MSI Mold is a custom injection molder known for tight tolerances and advanced tooling capabilities. With a strong focus on automotive and industrial sectors, the company provides in-house mold design and machining.
Strengths:
In-house mold design and toolmaking
Expertise in engineering-grade materials
Quick turnaround for prototyping and low-volume runs
The Rodon Group (USA)
The Rodon Group (USA)Founded: 1956
Headquarters: Hatfield, Pennsylvania, USA
Background:
With a legacy of producing billions of parts annually, Rodon is a high-volume injection molder with an emphasis on sustainability and cost efficiency. It’s best known for producing K’NEX toy parts and serving clients in packaging, construction, and medical sectors.
Strengths:
Fully automated facility
ISO 9001:2015 certified
U.S.-based and vertically integrated
Focus on green manufacturing
Ironwood Plastics (USA)
Ironwood Plastics (USA)Founded: 1979
Headquarters: Ironwood, Michigan, USA
Background:
Specializing in insert molding and engineering-grade materials, Ironwood Plastics serves the demanding automotive and industrial markets. It operates multiple facilities and is a subsidiary of CTB, Inc., a Berkshire Hathaway company.
Strengths:
Automotive-grade quality systems
Precision insert and overmolding
Decades of high-performance part manufacturing
Seaway Plastics Engineering (USA)
Seaway Plastics Engineering (USA)Founded: 1991
Headquarters: Port Richey, Florida, USA
Background:
Seaway Plastics focuses on low-to-mid volume production and serves regulated industries such as aerospace, defense, and medical. They offer full lifecycle support from DFM to packaging and distribution.
Strengths:
Class 100,000 clean room molding
Rapid prototyping to full-scale production
FDA-registered facilities
Texas Injection Molding (USA)
Texas Injection Molding (USA)Headquarters: Houston, Texas, USA
Background:
A customer-centric company, Texas Injection Molding provides custom molding, engineering, and tooling services to OEMs across industries. Their ISO-certified facility is equipped for high-repeatability production.
Strengths:
In-house tooling and maintenance
Strong customer service and engineering support
Emphasis on workforce development and training
Extreme Molding (USA)
Extreme Molding (USA)Founded: 2002
Headquarters: Watervliet, New York, USA
Background:
Extreme Molding is a women-owned business specializing in silicone injection molding. With clean room manufacturing and in-house fulfillment, the company serves premium baby, healthcare, and personal care brands.
Strengths:
Silicone and thermoplastic molding
Class 100,000 clean room
End-to-end production and fulfillment
ICOMold by Fathom (USA)
ICOMold by Fathom (USA)Founded: 2003
Headquarters: Holland, Ohio, USA
Background:
ICOMold offers an online platform for quoting and managing injection molding projects. With global manufacturing partners and quick-turn tooling, it’s ideal for startups and small businesses looking for fast, flexible production.
Strengths:
Online DFM, quoting, and order management
Cost-effective tooling solutions
Global manufacturing network
Choosing the Right Injection Molding Companies
The global injection molding industry is more competitive and innovation-driven than ever before. From large-scale mass production to precision micro-molding, the top 10 injection molding companies in the world offer unique strengths to match various industrial needs.
Whether you’re seeking the biggest injection molding companies for high-volume OEM production, or the top mould manufacturing companies in world for complex prototyping, selecting the right partner can directly influence your product’s quality, cost, and speed-to-market.
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