Denver, CO
1. LTM Plastics, Inc.
Address: 1100 W 45th Avenue, Denver, CO 80211
Phone: (303) 592-9548
Website: https://www.ltmplastics.com/
Email: info@ltmplastics.com
Founded: 1977
Services:
Custom plastic injection molding, secondary operations, over-molding, assembly and packaging, transfer tooling, industrial design consulting, Quick Response Manufacturing (QRM)
Industries Served:
Consumer products, industrial applications, concrete accessories, coffee/beverage accessories, personal care products
Certifications: Colorado Manufacturing Award Finalist (2023), Top 10 Plastic Tech Companies (2022)
Highlight:
Family-owned Denver molder with over 45 years of experience. Operates as a Quick Response Manufacturer, allowing them to adapt internal systems for nearly any job size, from 10,000 parts annually to over 1 million parts per year.
2. Caroba Plastics
Address: 3219 S. Platte River Drive, Englewood, CO 80110
Phone: (303) 781-6286
Website: https://caroba.com/
Email: customerservice@caroba.com
Founded: 1983
Employees: 100+
Facility: 40,000+ sq ft (including warehousing)
Services:
Thermoplastic injection molding, design assistance, tooling services, production, Class 10,000 cleanroom manufacturing, secondary operations, warehousing, cert-to-stock programs
Industries Served:
Medical, dental, high technology, semiconductor, industrial
Certifications: Cert-to-stock programs for medical and semiconductor markets
Highlight:
Rocky Mountain’s leader in injection molding with management team possessing over 100 years of combined technical experience. Features a Class 10,000 hard wall clean room for medical and contract assembly work, making them one of few molders awarded cert-to-stock programs for both medical and semiconductor markets.
3. B & R Plastics, Inc.
Address: 4550 Kingston St, Denver, CO 80239
Phone: (303) 373-0710
Website: https://www.brplastics.com/
Founded: 1969
Employees: Approximately 100
Services:
Custom high-volume plastic injection molding, custom color matching, domestic manufacturing, design consultation
Industries Served:
Retail, hospitality, kitchen/food service, dessert/bakery, healthcare, aquarium accessories
Highlight:
Over 45 years of precision plastic manufacturing experience specializing in high-volume injection molding. Known for producing dessert cups, folding storage solutions, and custom housewares. Commitment to domestic U.S. manufacturing with sustainability initiatives.
Oklahoma City, OK
1. ACO, Inc. (ACO Plastics)
Address: 1301 W. Sheridan Ave., Oklahoma City, OK 73106
Phone: (405) 239-6863
Website: https://acoincplastics.com/
Email: acoorders@coxinet.net
Founded: 1972
Facility: 90,000 sq ft
Services:
Custom plastic injection molding, structural foam molding (proprietary machines capable of producing 6-foot cube parts), CNC machining, on-location tool and die shop, CAD drafting, design assistance, prototyping, turnkey operations
Industries Served:
Agriculture, marine, automotive, materials handling, construction equipment, off-road vehicles, industrial cleaning equipment, point of purchase, lawn and garden, recreation, food service
Highlight:
Family-owned innovator spanning three generations with over 50 years in the polymer industry. Their proprietary structural foam machines have the capability to produce extremely large parts up to a six-foot cube, setting them apart from typical injection molders.
2. KECO Manufacturing
Address: 8100 SW 15th Street, Oklahoma City, OK
Phone: (866) 999-4113
Website: https://kecomfg.com/
Services:
Full-service contract manufacturing, plastic injection molding, product design and engineering, prototyping, hard and soft tooling, over-molding, complex part assembly, high tonnage molding (28 to 1,100 tons), logistics and fulfillment, warehousing, packaging, drop shipping
Industries Served:
OEMs across specialty markets, automotive, paintless dent repair, architectural lighting, consumer products
Highlight:
Positions themselves as a concierge manufacturing partner rather than an ordinary molder. Developed beyond typical injection molding to offer supply chain management, mechanical assembly, metals, plastics, and electronics integration, providing a true turnkey solution for OEMs.
3. OMG Tooling, Inc.
Address: 8000 SW 8th Street, Oklahoma City, OK 73128
Phone: (405) 789-4774
Website: https://omgtooling.com/
Founded: 1989
Employees: Approximately 9
Services:
Full-service plastic injection molding, custom designing, tooling fabrication, mold building, transfer tooling, in-house tooling services and maintenance
Industries Served:
Consumer goods, healthcare, sports and leisure, construction, transportation, infrastructure, electronics, technology, industrial
Highlight:
Offers over a century of combined experience in designing, tooling, and molding services. Unlike most molders who have eliminated in-house tooling services, OMG maintains enhanced tooling capabilities for building advanced tooling, improving part pricing and quality, and preserving tooling life. Strategically located for optimal supply chain access to major retailers and distribution centers.
Nashville, TN
Note: Nashville has limited plastic injection molding facilities within city limits. The following verified companies serve the greater Nashville metro area from locations within Tennessee.
1. Plastic Industries (PI, Inc.)
Address: 213 Dennis Street, Athens, TN 37303
Phone: (423) 745-6213
Website: https://custommolding.com/
Email: sales@custommolding.com
Founded: 1955
Facility: Multiple facilities in East Tennessee
PI, Inc. is located in Athens, TN (approximately 150 miles from Nashville), serving the Nashville metro area with same-day shipping capability to major cities including Nashville, Memphis, St. Louis, and Louisville.
Services:
Custom plastic injection molding (88 to 1,500 ton presses), low-pressure structural foam molding, plastic vacuum forming, RF welding, in-house tooling design, warehousing, press-side packaging, hot stamping, sonic welding
Industries Served:
Medical, recreational, military, aerospace, poultry, firearms, plumbing, electrical, structural, packaging, furniture, swimming pools
Certifications: ISO 9001
Highlight:
Third-generation family business with nearly 70 years of custom plastic injection molding experience. Daily capacities range from several hundred large parts to over 500,000 smaller parts. Can manufacture components as small as a bottle cap or as large as an 8-foot plastic pallet.
2. GreenLeaf Industries
Address: 310 Bussell Ferry Road, Lenoir City, TN 37771
Phone: (865) 988-5661
Website: https://greenleaf.biz/
Founded: 1999
Employees: 27-50
Facility: 21,000 sq ft
GreenLeaf Industries is located in Lenoir City, TN (approximately 160 miles from Nashville), serving customers throughout Tennessee including the Nashville metro area.
Services:
Custom plastic injection molding using all-electric molding machines, design services, prototyping, tooling, production, assembly, sonic welding, hot stamping
Industries Served:
Automotive, healthcare, consumer goods, industrial applications, firearms components
Certifications: ISO Certified
Highlight:
Family-owned custom plastic injection molder known for using exclusively all-electric molding machines, providing a blend of quality, speed, and competitive pricing that sets them apart. Specializes in taking on complex, mission-critical applications that other molders dismiss.
3. Advantage Manufacturing Corporation
Address: 9630 US Highway 412, Friendship, TN 38034
Phone: (731) 677-2612
Website: https://advantagemfginc.com/
Founded: 1993
Employees: 40-70
Facility: 40,000 sq ft
Advantage Manufacturing is located in West Tennessee (approximately 130 miles from Nashville), strategically positioned with highway access to I-40 and convenient connections to Nashville, Memphis, St. Louis, and Louisville.
Services:
Injection molding with supply chain management and engineering support, assemblies, component manufacturing
Industries Served:
Automotive, packaging, medical
Certifications: ISO 9001:2015
Highlight:
An SGE Company and nominee for the TNSBDC SBA Business of the Year award. Strategically located in West Tennessee with excellent logistics access including highway connections to I-40 and I-155, Memphis International Airport, and five Class 1 railroads. Committed to USA-based manufacturing.
Notes
The Denver metro area demonstrates a strong concentration of established plastic injection molding companies, with several having operated for over 40 years. Companies like LTM Plastics and Caroba Plastics offer specialized capabilities including cleanroom manufacturing and Quick Response Manufacturing that serve diverse industries from medical devices to consumer products.
Oklahoma City’s injection molding sector shows particular strength in contract manufacturing and turnkey solutions. ACO Plastics’ proprietary structural foam technology for large-format parts and KECO Manufacturing’s integrated supply chain approach distinguish the region’s offerings.
The Nashville, TN market presents a unique situation where plastic injection molding facilities are distributed across East and West Tennessee rather than concentrated in the city proper. Companies like Plastic Industries in Athens and GreenLeaf Industries in Lenoir City serve Nashville-area customers through efficient logistics networks. This regional distribution pattern reflects Tennessee’s broader manufacturing landscape where facilities are positioned for optimal highway and rail access rather than urban proximity.
All companies verified offer custom injection molding services with various specializations. Selection criteria prioritized companies with verifiable contact information, active websites, and plastic injection molding as a core service offering.
Research conducted January 2026. Verify all information directly with companies before business engagement.