Houston, TX
1. Chemplast, Inc.
Address: 1002 Texas Parkway, Stafford, TX 77477
Phone: (281) 208-2585
Website: https://chemplastinc.com/
Email: sales@chemplastinc.com
Founded: 2000
Facility: 230,000 sq ft (expanded with additional 119,866 sq ft facility in 2023)
Services:
High-volume custom injection molding, dual-shot and 2-shot molding, large clear part molding, compression molding, vacuum forming, CNC machining
Industries Served:
Automotive, construction, food and beverage, HVAC, lighting and electrical, oil and gas
Certifications: ISO 9001:2015, ISO 14001:2015, UL Listed
Highlight:
Family-owned Chemplast operates one of the largest injection molding facilities in the Houston area with over 350,000 sq ft of combined manufacturing space. Their 50+ injection molding presses range from 120 to 2,200 tons, enabling production of parts from small components to large automotive and construction assemblies. Three-time Inc. 5000 honoree and Houston Fast 50 recipient, the company’s 2023 facility expansion signals continued growth in serving the Gulf Coast energy and construction sectors.
2. Texas Injection Molding
Address: 11015 Bay Commerce Drive, Houston, TX 77034
Phone: (281) 489-4292
Website: https://texasinjectionmolding.com/
Services:
Custom plastic injection molding, blow molding, in-house tooling design, plastic assembly and decoration, warehouse and logistics, embedded RFID asset tracking
Industries Served:
Business electronics, food and beverage, sports and outdoor, medical and pharmaceutical, energy, industrial and safety
Certifications: ISO 9001:2015, ITAR Registered, FDA Registered
Highlight:
Texas Injection Molding operates 33 injection molding machines ranging from 55 to 1,350 tons across 3 shifts, 5-7 days per week. Their ITAR registration qualifies them for defense contracts while FDA registration enables medical and pharmaceutical manufacturing. Named a 2025 Best Places to Work, the company serves Houston, Austin, San Antonio, and the broader Southeast United States through partnerships with leading resin manufacturers and custom compounders. Their embedded RFID asset tracking capability distinguishes them in supply chain management.
3. Blackwell Plastics
Address: 5606 Cavanaugh St, Houston, TX 77021
Phone: (713) 643-6577
Website: https://www.blackwellplastics.com/
Email: sales@blackwellplastics.com
Founded: 1939
Services:
Plastic injection molding, plastic extrusion, in-house tool and die building, plastic assembly and finishing (machining, welding, heat staking, inserts), Kanban and managed inventory service
Industries Served:
Life sciences, industrial, electronics, firearms, outdoor products, energy, aerospace, food and beverage
Certifications: ISO 9001:2015
Highlight:
With roots dating back to 1939, Blackwell Plastics is the largest custom injection molding manufacturer in South Texas and the South Central United States. Their 28 injection molding machines range from 22 to 620 tons with shot capacities up to 60 oz. The company’s multiple core pull capability enables production of complex parts with undercuts and internal features. Over 85 years of continuous operation and full design-to-fulfillment capabilities make them a cornerstone of Houston’s manufacturing landscape, serving clients from Corpus Christi to Austin.
Phoenix, AZ
1. American Plastics Co., Inc.
Address: 6821 North 55th Ave, Glendale, AZ 85301
Phone: (623) 939-8449
Website: https://americanplasticsco.com/
Founded: 1988
Services:
Start-to-finish production support, tooling design, in-house product assembly, hot stamping, pad printing, heat transfer labeling, ultrasonic welding, measured filling operations, drop shipping
Industries Served:
Pool and spa, construction, electrical, sporting goods, consumer goods
Certifications: ISO 9001
Highlight:
Arizona’s leading ISO-certified injection molding manufacturer, American Plastics operates 13 injection presses ranging from 55 to 400 tons with tie bar spacing up to 36 inches and shot sizes up to 54 oz. Their expertise spans both commodity resins (polyethylene, polystyrene) and engineering-grade materials (nylon, polycarbonate, Santoprene). Complete assembly, packaging, and order fulfillment capabilities with drop shipping make them a full-service partner for pool and spa and construction industry OEMs.
2. ICON Injection Molding, Inc.
Address: 23034 N. 17th Drive, Phoenix, AZ 85027
Phone: (623) 869-0200
Website: https://www.iconinjectionmolding.com/
Founded: 2001
Employees: Approximately 90
Services:
Custom plastic injection molding, tooling and machining, secondary operations, engineering-based scientific approach to design and manufacturing
Industries Served:
Medical devices, consumer products, industrial applications
Certifications: ISO 9001:2015, ISO 13485
Highlight:
Founded by three brothers (Danny, Philip, and Steve Kleitsch) who learned the craft in their father’s injection molding and tooling shop starting in the late 1970s, ICON embodies multi-generational family expertise. Their company motto “Excellence from Art to Part” reflects an engineering-based scientific approach to manufacturing. ICON was the first custom molder in Arizona to deploy electric-hybrid molding machines, demonstrating commitment to precision and energy efficiency. Dual ISO certifications (9001 and 13485) qualify them for both industrial and medical device manufacturing.
3. Daystar Products International
Address: 841 S. 71st Ave, Phoenix, AZ 85043
Phone: (623) 907-0081
Website: https://www.daystarweb.com/
Email: Sales@daystarweb.com
Founded: Late 1970s
Employees: Approximately 80
Facility: 27,000 sq ft
Services:
Elastomeric compound molding (flexible PVC, thermoplastic polyurethanes, TPR), elastomeric boots and bellows design and production, cast polyurethane elastomeric and microcellular foam parts, in-house tooling (single cavity prototype to multicavity hot runner molds)
Industries Served:
Automotive (primary focus), industrial
Certifications: ISO 9001
Highlight:
A division of Arizona Archery Enterprises, Daystar has spent 45+ years developing proprietary polymer formulations and design software for elastomeric applications. Their Van Dorn molding machines (85 to 400 tons) specialize in flexible materials that other molders avoid. As a recognized specialist in cast polyurethane parts and elastomeric boots/bellows, they serve automotive OEMs requiring durable, flexible components. Annual revenue of approximately $23.9 million reflects their specialized market position in this technical niche.
Philadelphia, PA
1. The Rodon Group
Address: 2800 Sterling Drive, Hatfield, PA 19440
Phone: (215) 822-5544
Website: https://www.rodongroup.com/
Founded: 1956
Facility: 250,000+ sq ft (125,000 sq ft primary plus 125,000 sq ft secondary location)
Services:
High-volume precision manufacturing, in-house mold design and building, fully automated robotics facility, domestic supply chain management
Industries Served:
Medical and pharmaceutical, food and beverage, windows and doors, construction, household appliances, consumer products
Certifications: ISO 9001:2015, ISO 13485, HACCP, GMA-SAFE
Highlight:
Third-generation family-owned Rodon Group is one of the largest family-owned injection molders in the United States, operating 125+ injection molding presses (46 to 720 tons) with shot sizes from fractional to 107 oz. Their “Cheaper than China” pricing policy has made them a leader in the reshoring movement. As a subsidiary of K’NEX Brands and a designated Landfill-Free Facility, they produce billions of parts annually while running 24/7, 365 days per year. New cleanroom capabilities expand their medical device manufacturing footprint.
2. Aline Components, Inc.
Address: 1830 Tomlinson Rd, Kulpsville, PA 19443
Phone: (215) 368-0300
Website: https://www.alinecomponents.com/
Founded: 1965
Facility: 18,000 sq ft on 5 acres
Services:
Custom thermoplastic injection molding, in-house mold design and tooling, rapid prototyping, hot runner systems, post-production operations (machining, decorating, packaging)
Industries Served:
Automotive, medical, consumer electronics, industrial equipment
Certifications: ISO 9001, QS 9001 Compliant
Highlight:
An all-American company using exclusively American raw materials, Aline Components operates 24 injection molding machines ranging from 28 to 300 tons. Over 25 years of design experience on staff enables full in-house design-to-delivery capability. They serve the Mid-Atlantic region (Pennsylvania, New Jersey, New York, Delaware, Maryland) plus international customers, emphasizing domestic sourcing and American manufacturing values since 1965.
3. Schubert Plastics, Inc.
Address: 245 Lungren Road, Lenni, PA 19052
Phone: (610) 358-4920
Website: https://schubertplastics.com/
Email: schubert.plastics@verizon.net
Founded: 1994
Services:
Custom injection molding, turnkey solutions, 2D/3D design (SolidWorks, Pro/E), FEA analysis, rapid prototyping, mold flow analysis, domestic and offshore tooling, post-molding (machining, assembly, specialized packaging, order fulfillment)
Industries Served:
Various industrial and consumer applications
Certifications: Compliant to customer and industry quality control standards
Highlight:
Family-owned Schubert Plastics operates machines from 35 to 618 tons with robotics and full auxiliary equipment from their Delaware Valley location 20 miles south of Philadelphia. Their engineering capabilities include SolidWorks and Pro/E design, FEA analysis, and mold flow simulation. With over 55 years of combined industry experience among their team, they offer both domestic and offshore tooling options while maintaining tight cost control that benefits customers. Their extensive materials expertise spans 18+ resin types including high-performance materials like PEEK and Ultem.
Notes
Research across these three major metropolitan areas reveals distinct regional strengths in the plastic injection molding industry.
Houston’s injection molding sector reflects the city’s energy industry heritage, with companies like Chemplast and Blackwell Plastics serving oil and gas, HVAC, and construction markets. The Gulf Coast region’s logistics advantages (port access, highway networks) support large-scale operations, evidenced by Chemplast’s 350,000+ sq ft combined facility footprint. Blackwell Plastics’ 85-year history makes it one of the oldest continuously operating injection molders in the southern United States.
Phoenix demonstrates strong family-owned business culture with all three verified companies (American Plastics, ICON, Daystar) maintaining multi-generational or founding-family leadership. ICON’s distinction as Arizona’s first electric-hybrid molder and Daystar’s proprietary polymer formulations represent technical differentiation in a competitive market. The region shows particular strength in automotive and industrial applications.
Philadelphia’s injection molding cluster emphasizes medical and pharmaceutical manufacturing, with Rodon Group and Aline Components both holding medical-related certifications. The Rodon Group’s “Cheaper than China” reshoring initiative and billion-part annual production capacity position them as a national leader. The concentration of companies within 40 miles of Philadelphia proper reflects the region’s historical manufacturing density and access to East Coast markets.
All companies verified offer custom injection molding as a core service with various specializations. Press capacities across these nine companies range from 22 tons (Blackwell) to 2,200 tons (Chemplast and KB Components), accommodating applications from precision medical components to large automotive assemblies.
Research conducted January 2026. Verify all information directly with companies before business engagement.