Boston, MA
1. Mack Prototype, Inc.
Located in Gardner, MA (approximately 50 miles from Boston), serving the Boston metro area
Address: 424 Main Street, Gardner, MA 01440
Phone: (978) 632-3700
Website: https://www.mackprototype.com/
Services:
Plastic injection molding, 3D printing and additive manufacturing, urethane casting, CNC machining, finish and paint services, NPI Launch Lab, rapid prototyping
Industries Served:
Medical, industrial, defense, consumer markets
Highlight:
Mack Prototype specializes in low-volume production (100 to 50,000 parts per year) of complex small to medium-sized parts. The company offers multiple tooling strategies including rapid prototype tools, production tools, single and multi-cavity molds, and works with high-performance materials like Carbon Fiber Filled, Ultem, PEEK, and PPSU. Part of the larger Mack Group, Inc., operating 10 manufacturing locations throughout the eastern United States and Mexico.
2. Micron Solutions
Located in Fitchburg, MA (approximately 47 miles from Boston), serving the Boston metro area
Address: 25 Sawyer Passway, Fitchburg, MA 01420
Phone: (978) 345-5000
Website: https://www.micronsolutions.com/
Email: info@micronsolutions.com
Founded: 1972
Services:
Plastic injection molding, contract assembly, engineering, machining, mold making, sensors
Industries Served:
Medical devices and health, orthopedics, test kits, drug delivery devices, life sciences, defense, industrial, consumer
Certifications: ISO 13485, ITAR
Highlight:
One of the oldest companies in the injection molding industry, with roots dating back to 1925 through the shop they acquired. Micron Solutions offers Class 7 Cleanroom capabilities and builds Class 101 or 102 molds guaranteed to produce at least one million cycles. They create automated assemblies for high-volume part consistency and quality, partnering with thousands of companies throughout the U.S. and worldwide.
3. Hi-Tech Mold & Tool, Inc.
Located in Pittsfield, MA (Western Massachusetts, approximately 130 miles from Boston), serving Massachusetts statewide
Address: One Technology Drive West, Pittsfield, MA 01201
Phone: (413) 443-9184
Website: https://hitechmoldtool.com/
Founded: 1983
Services:
Plastic injection molding, plastic part and stock shape machining, plastic part assembly and testing, plastic part and mold laser etching, injection mold tool building and maintenance, tool relocation
Industries Served:
Aerospace, medical, military and defense, consumer recreation, seals and bushings
Highlight:
Hi-Tech Mold & Tool operates as a hybrid facility blending injection molding benefits with precision machine shop capabilities. The company has developed proprietary manufacturing processes for high-temperature molding, becoming a resource for cost-effective metal substitution. They have worked with major clients including Polaroid and won an $11 million bid to produce environmental control components for the Boeing 787 Dreamliner.
Detroit, MI
1. A & D Plastics Inc.
Located in Plymouth, MI (approximately 25 miles from Detroit), serving the Detroit metro area
Address: 1255 S. Mill Street, Plymouth, MI 48170
Phone: (734) 455-2255
Website: https://www.adplastic.com/
Founded: 1968
Facility: 24,000 square feet
Services:
Custom injection molding, mold design, tool building, assembly, secondary operations
Industries Served:
Automotive, non-automotive industrial
Highlight:
Family owned and operated for over 50 years, A & D Plastics is a small part molder specializing in close tolerance, engineered plastics. Their Plymouth facility houses offices, manufacturing plant, tool room, and warehouse, conveniently located near major freeways and Detroit Metro Airport. The company operates ten horizontal molding presses and one vertical molding press.
2. BMI Injection Molding & Assembly
Located in Chesterfield, MI (approximately 30 miles from Detroit), serving the Detroit metro area
Address: 52100 Sierra Drive, Chesterfield, MI 48047
Phone: (586) 598-4100
Website: https://www.bmi-corp.com/
Founded: 1988
Services:
Plastic injection molding, contract assembly, product development, 3D printing, prototyping, pad printing, hot stamping, sonic welding, supply chain management, CNC machining, packaging and assembly, parts kitting, inspection and parts rework
Industries Served:
Automotive (Tier 1 and 2 suppliers), medical, industrial, consumer, marine/RV, electric vehicle components
Certifications: IATF 16949:2016
Highlight:
BMI is an integrated, diversified manufacturing support company with a primary focus on automotive suppliers. They offer value-added injection molding within product assembly work cells, 100 to 600 ton molding capability with advanced process controls, and comprehensive support from product concept through distribution. Their excellent Part Per Million (PPM) rating demonstrates commitment to quality.
3. MSI Mold
Located in Imlay City, MI (approximately 55 miles from Detroit), serving the Detroit metro area
Address: 2045 S. Almont Avenue, Imlay City, MI 48444
Phone: (248) 275-1978
Website: https://www.msi-mold.com/
Email: sales@msi-mold.com
Founded: 2005
Services:
Plastic injection molds, prototype injection molding, custom injection molding, design and engineering, assembly, precision CNC machining, mold flow analysis
Industries Served:
Automotive, industrial
Certifications: ISO certified, ITAR registered
Highlight:
MSI Mold originated as an engineering and consulting business serving the greater Detroit automotive industry before expanding into full manufacturing. In 2022, they moved into a new facility with expanded capacity. By 2024, they added in-house climate controlled CMM inspection and high-speed 4-axis horizontal pallet change CNC machining. All molds are built and maintained in-house by their mold making staff.
Portland, OR
1. Creative Plastics Injection Molding, Inc.
Located in Clackamas, OR (approximately 10 miles from Portland), serving the Portland metro area
Address: 15635 SE 114th Avenue, Suite 109, Clackamas, OR 97015
Phone: (503) 656-0653
Website: https://cpimi.com/
Founded: 2001
Employees: Approximately 18
Facility: 10,000 square feet
Services:
Custom injection molding, part design consultation, secondary operations, sonic welding, brass insert installation, tool storage
Industries Served:
Diversified industries, domestic and international customers
Certifications: ISO 9001
Highlight:
Family owned and operated, Creative Plastics operates eight injection molding machines ranging from 40 ton to 180 ton capacity (parts up to 12.7 ounces). Most machines feature microprocessor controls for accurate, repeatable processing. They use automated, closed-loop drying and loading systems to prevent moisture or contamination, and have added sprue-picking robots to increase efficiency. Located just 15 minutes from downtown Portland.
2. KASO Plastics
Located in Vancouver, WA (approximately 10 miles from Portland), serving the Portland metro area
Address: 5720-C NE 121st Avenue, Suite 110, Vancouver, WA 98682
Phone: (360) 254-3980
Website: https://www.kaso.com/
Email: info@kaso.com
Founded: 1962
Facility: 65,000 square feet
Services:
Plastic injection molding, structural foam molding, insert/over molding, gas assist molding, material selection, early supplier involvement, metal to plastic conversion, mold flow analysis, rapid prototyping, 3D printing, decoration services, ultrasonic welding, EMI and RFI shielding
Industries Served:
Automotive, consumer products, electrical connectors, medical, military, sports equipment, windows and doors, agriculture
Certifications: ISO 9001:2015
Highlight:
With over 60 years serving the Pacific Northwest, KASO Plastics combines professional engineering, manufacturing, and project management expertise. Their sales, product, and production engineers average over 30 years of experience. Located just off Interstate 205 in Vancouver, they serve the Portland metro area as a contract manufacturing powerhouse with advanced technology and rigorous quality control.
3. Vision Plastics, Inc.
Located in Wilsonville, OR (approximately 20 miles from Portland), serving the Portland metro area
Address: 2600 Parkway Center Drive, Wilsonville, OR 97070
Phone: (503) 685-9000
Website: https://visionplastics.com/
Services:
Injection molding, contract manufacturing, plastic assembly services, automation, custom end of arm tooling, fixturing and molding automation, heat staking, ultrasonic welding, coordinate measuring machine (CMM) metrology, design for manufacturing, mold flow analysis, clean room molding, insert molding
Industries Served:
Medical, industrial, consumer markets
Certifications: ISO 9001:2015 (TUV Rheinland of North America)
Highlight:
Vision Plastics positions itself as a full-service plastic manufacturing partner offering complete solutions from concept to finished product. They employ Lean Manufacturing methods to minimize waste and maximize efficiency, providing environmentally conscious and cost-effective options. The company maintains an in-house engineering team for support throughout the entire project lifecycle, earning a reputation as a preferred U.S. supplier among international customers.
Notes
Research across these three metropolitan areas reveals distinct regional manufacturing characteristics. The Boston/Massachusetts region shows a strong concentration of companies serving medical device, aerospace, and defense sectors, with several firms maintaining decades-long histories and specialized cleanroom capabilities. The Detroit metro area, as expected, demonstrates deep automotive industry ties with IATF certification being standard and companies offering integrated supply chain support for Tier 1 and 2 suppliers. The Portland/Pacific Northwest region features companies emphasizing engineering services and sustainable manufacturing practices, with strong ISO certification standards and diversified industry portfolios.
Several companies in the Boston area are located in smaller surrounding communities (Gardner, Fitchburg, Pittsfield) rather than Boston proper, reflecting the historical distribution of manufacturing in New England. Detroit-area companies similarly extend throughout the metro region into Plymouth, Chesterfield, and Imlay City. The Portland search yielded strong results from the broader metro area including Clackamas, Vancouver (WA), and Wilsonville.
All companies verified have active websites with https:// security, verifiable contact information, and plastic injection molding as a core service offering.
Research conducted January 2026. Verify all information directly with companies before business engagement.