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Automotive Injection Molding Companies

Last updated: January 2026

This directory lists 92 automotive injection molding companies across the United States, from rapid prototyping specialists to high-volume Tier 1 component manufacturers.

Buyers frequently seek partners who can resolve persistent issues like inconsistent part weight, sink marks on aesthetic surfaces, or the inability to meet challenging flatness requirements for mating components. The intricacies of achieving uniform wall thickness across complex geometries, or ensuring reliable overmolding adhesion for robust sealing applications, often become central challenges suppliers must address, demanding expertise in process control and mold design.

Suppliers in this sector range from boutique shops specializing in small-batch prototyping and low-volume production for niche vehicle markets, to large-scale operations equipped with extensive automation for high-cavitation tooling and millions of parts annually. Some focus on specific material groups, like high-temperature engineering resins for under-hood applications, while others offer comprehensive services including assembly, testing, and direct line-side delivery for major OEMs, distinguishing themselves by their breadth of capabilities and scale of operations.

92 companies·57 emails·86 phones

Company Directory

92 companies nationwide

Chatsworth, CA

A & S Mold & Die Corporation, based in Chatsworth, CA, specializes in custom plastic injection molding, offering full mold design, build, and repair. They operate 46 machines (22-1200 tons) for insert/overmolding diverse materials like nylon and PEEK, adhering to ISO 9001:2015 and QS standards.

Anaheim, CA

Based in Anaheim, CA, Action Plastic Injection Molding offers precision plastic injection molding services and custom tooling. With over 30 years of expertise, they specialize in processing high-performance resins like PEEK and Radel for demanding applications. The company provides comprehensive solutions from design consultation to final production, ensuring superior quality.

Advanced Plastiform, Inc. provides custom plastic manufacturing services, specializing in injection molding and thermoforming. Established in 1988, the company offers high-precision, repeatable plastic parts, complemented by CNC and robotic trimming, pressure forming, and value-added assembly, ensuring durability and quality.

National City, CA

Based in National City, CA, Advance Plastics is a custom plastic injection molding company established in 1978. Operating a 24-hour production floor, they produce diverse plastic parts. Their capabilities and product examples, such as 'Rim Ring Protector CarZcarRims,' indicate potential service to the automotive industry.

Autronic Plastics, Inc. is a custom plastic injection molding company, operating since 1953. They specialize in precision plastic components, metal replacement, and difficult-to-process engineering resins. Services include full-service mold making, rapid prototyping, and expertise in multi-action, 2-shot, and over-molds.

Aurora, OH

Based in Aurora, OH, Automation Plastics Corporation is an ISO 9001:2015 certified custom molder of thermoplastic injection molded parts. They specialize in high-volume production of precision plastics, including tight-tolerance functional and heavy wall components. The company operates 24/7 with 40 presses, offering comprehensive injection molding, precision machining, and assembly services.

Ontario, CA

Bernman Mold & Engineering, a U.S. family-owned company since 1994, specializes in custom steel mold manufacturing. They provide comprehensive molding services, including injection, refurbishment, repair, and design. Capabilities extend to advanced polishing, new tooling, laser welding, and CNC methods, ensuring precision components for various industrial applications.

Irvine, CA

Based in Irvine, CA, California Plastics specializes in custom plastic injection molding and manufacturing. They provide comprehensive solutions from concept to production, including overmolding and insert molding. Serving diverse industries such as automotive, medical, aerospace, and electronics, the company delivers tailored manufacturing services.

Grand Rapids, MI

Based in Grand Rapids, MI, Cascade Engineering is a plastic molding company specializing in large tonnage injection molding. They partner with manufacturers, particularly in the automotive industry, providing engineering and technology solutions to scale production and solve problems with a focus on sustainability.

Elgin, IL

Based in Elgin, IL, Chemtech Plastics provides precision injection molded components for the automotive industry. With over 40 years of experience, the company offers comprehensive services including precision molding, toolmaking, engineering, automation, and quality assurance. Chemtech Plastics is certified to IATF 16949:2016 and ISO 9001:2015.

Elkhart, IN

Headquartered in Elkhart, IN, Lippert specializes in plastic molding manufacturing, including custom thermoforming, injection molding, and roto-molding. The company serves various industries, prominently providing automotive OEMs, first and second-tier suppliers, and the aftermarket with innovative plastic solutions from its state-of-the-art facilities across North America.

El Cajon, CA

Based in El Cajon, CA, DaMar Plastics is a plastic injection and blow molding manufacturer. They offer comprehensive services from design and mold manufacturing to injection and blow molding, alongside various value-added solutions. The company assists customers in San Diego and Southern California with transforming their product visions into reality.

Georgetown, TX

Based in Georgetown, TX, Detail Mold & Manufacturing is an experienced provider of plastic injection molding services. With over 30 years in the industry, the company offers capabilities spanning from initial tool design and mold validation to full production runs, partnering with clients for project success.

West Des Moines, IA

Engineered Plastic Components, Inc. (EPC) specializes in plastic injection molding services for a wide range of products. Operating facilities in Saint Clair, MI, and East Troy, WI, EPC utilizes presses from 25 to 4000 tons, including two-shot molding capabilities up to 880 tons, ensuring comprehensive manufacturing solutions for clients.

Corona, CA

Based in Corona, CA, Elastomer Technologies, Inc. specializes in customer-tailored molding and die-cutting for engineered parts. With experience since 1975, they offer diverse part fabrication, including compression, transfer, prototype, and liquid injection molding. They utilize energy-efficient 100 and 150-ton presses to produce high-quality custom solutions.

Mchenry, IL

Based in McHenry, IL, Fabrik Molded Plastics, Inc. provides custom plastic injection and insert molding services. They apply a scientific approach to mold building and processing, offering engineered solutions for automotive, healthcare, and electronics markets. Capabilities include automotive lighting, lenses, throttle bodies, sensors, and steering column modules.

Global Plastics offers full-service plastic injection molding, specializing in automotive lighting applications. They provide comprehensive molding, tooling, and product development. Certified to ISO 9001 and IATF 16949, the company ensures quality management focused on defect prevention and waste reduction in automotive manufacturing.

Elgin, IL

Hansen Plastics manufactures high-quality injection molded plastic parts specifically for the automotive industry. The company specializes in producing components for various automotive applications. Based in Elgin, IL, it provides comprehensive plastic manufacturing solutions to its commercial clients.

Riverside, CA

Based in Riverside, CA, Hi-Rel Plastics & Molding, Inc. specializes in custom plastic injection and blow molding services. With over 40 years of experience, they provide part evaluation, 3D printing, and prototyping. The company is ISO 9001:2015, AS 9100 Rev D, and 13485:2016 certified, operating an ISO 7 clean room.

Sun Valley, CA

Based in Sun Valley, CA, JB Custom Mold Mfg. offers plastic injection molding, mold design, and fabrication services. They provide strict-tolerance thermal plastic injection molding for quick prototype engineering and scaled production manufacturing. With over 30 years in business, JB Custom Mold delivers complete manufacturing solutions.

Palatine, IL

Based in Palatine, IL, JDI Plastics is a custom injection molding company providing high-quality automotive injection molding services. The company meets the precise needs of manufacturers, specializing in custom products. JDI Plastics also offers production management and value-added services to simplify customer supply chains.

Fowler, CA

Jet Mold Products Inc, based in Fowler, CA, specializes in custom plastic injection molding services. They offer prototyping and tooling solutions, operating injection molding machines from 28 to 675 tons for a wide range of part sizes. The company supports projects from concept to production for nationwide customers.

Grand Rapids, MI

Kendrick Plastics, based in Grand Rapids, MI, is a full-service supplier of decorative interior trim components and assemblies for the automotive industry. They provide engineering design and product development, leveraging manufacturing process technologies to deliver vehicle interior solutions including instrument panels, door panels, and consoles.

Fenton, MO

Koller Craft, based in Fenton, MO, specializes in precision injection molding for the automotive industry. They produce critical components, including head and tail light housings, various seat components, and precision-engineered exterior parts. The company focuses on manufacturing high-quality, specialized solutions for automotive applications.

San Jose, CA

Based in San Jose, CA, KS Plastic Inc. is a plastic injection molding manufacturer. They specialize in complex molding processes, including insert and overmolding, alongside CNC machining and various assembly services. The company serves diverse industries such as automotive, medical, electronics, and aerospace.

Dallas, TX

Based in Dallas, TX, Meridian Products Corporation is an ISO 9001:2015 certified custom thermoplastic injection molding company. They produce precision plastic parts for diverse markets, including automotive. Core services feature plastic injection molding, overmolding, insert molding, and assembly. They also provide tooling and design support to clients.

Arlington, TX

Based in Arlington, TX, Metro Custom Plastics specializes in plastic injection molding with over 50 years of experience. Their 14-machine, 24/7 shop handles conventional injection molding of diverse plastics for prototype to large production orders. They also offer design, engineering, and packaging consultation.

Fort Worth, TX

Based in Fort Worth, TX, Micro Mold Plastics USA, Inc. specializes in plastic injection molding services. The company is ISO 9001:2015 and AS9100D certified, as well as DDTC registered, indicating high-quality manufacturing for various industries, including those with stringent requirements.

Roseville, MI

Based in Roseville, MI, Midwest Mold offers low volume plastic injection molding services. The company also manufactures production, 2-shot, conventional, and pre-production molds. They are experienced in serving the automotive electric vehicle (EV) market.

Kimball, MI

Based in Kimball, MI, MPP Corporation manufactures custom injection molds, offering rapid delivery for prototype and production tooling. They specialize in two-shot molds for diverse materials and industries. A primary focus is automotive plastic injection molding for Tier 1 and 2 suppliers, backed by IATF16949:2016 certification.

Chino, CA

Based in Chino, CA, Norco Plastics, Inc. provides custom plastic injection molding services. The company specializes in large tonnage capacity up to 2800 tons, offering 24/7 production for various industries, including automotive components, construction, medical, and agriculture.

Sanger, TX

Based in Sanger, TX, North Texas Plastics has provided plastic injection molding services since 1978. The company meets the custom injection molding needs of various industries, offering comprehensive solutions for plastic components. They focus on delivering quality manufacturing for diverse client requirements.

San Diego, CA

Based in San Diego, CA, Monroe OEM LLC provides custom manufacturing solutions, specializing in advanced engineering and production processes. They offer precision injection molding, machining, and metal fabrication services for various industries, including automotive, medical, and aerospace. The company delivers high-quality components from design to logistics.

Pomona, CA

Performance Engineered Products Inc. is a custom injection molded plastics manufacturer headquartered in Pomona, CA. The company specializes in serving highly technical industries including automotive, aerospace, defense, and medical devices. They offer mold manufacturing, reverse engineering, plastic component assembly, and JIT services.

Based in Fairview, PA, PHB Inc. is an IATF 16949 certified U.S. manufacturer specializing in plastic molding, including automotive injection molding, with a focus on rubber. They also offer die casting, CNC machining, and tool and die services for automotive, military, and consumer goods.

Van Nuys, CA

Based in Van Nuys, CA, Precision Molds & Molding Co. specializes in full-service custom plastic injection molding. With over three decades of experience, they provide solutions from conceptualization and design through final production. The company emphasizes unmatched quality, rigorous testing, and reliable delivery for diverse client needs.

Upland, CA

Based in Upland, CA, Precision Molded Plastics specializes in custom plastic injection molding services. They provide precision-molded components for industrial and commercial clients. The company utilizes advanced manufacturing processes to deliver high-quality plastic parts, serving diverse sectors, including the automotive industry.

Chesterfield, MI

Based in Chesterfield, MI, Prism Plastics manufactures high-precision, tight-tolerance injection molded plastic components for the automotive industry. They specialize in safety-critical, electronic, fuel, steering, and drivetrain parts, supplying Tier 1 and Tier 2 Fortune 500 suppliers from multiple US and Mexican facilities.

Point Pleasant, WV

PTI Incorporated is a diversified molder providing custom plastic injection molding for thermoset and thermoplastic compounds. With injection and compression presses (85-1500 Ton), they offer mold design, rapid prototyping, and secondary operations. PTI manufactures high-quality molded components specifically for the automotive, medical, and electrical industries.

Gainesville, TX

Based in Gainesville, TX, Reliant Worldwide Plastics specializes in custom plastic injection molding and contract manufacturing. The company provides comprehensive services including design, tooling, engineering, and value-added assembly. They supply plastic components for diverse sectors such as automotive, HVAC, consumer, medical, and recreation industries.

Houston, TX

Based in Houston, TX, RMC Plastics is an experienced injection molding company with over 50 years in operation. They manufacture precision plastic and rubber molded parts for diverse industries, offering services from design and tooling to material selection and high-volume production. All products are made in the USA.

Toledo, OH

Based in Toledo, OH, Seagate Plastics specializes in custom injection molded plastics and extrusion. With facilities in Ohio and Michigan, they offer high-quality plastic components, CNC machining, fabrication, and assembly. Serving industrial and OEM customers, Seagate Plastics provides durable solutions for diverse applications, including automotive.

Escondido, CA

Based in Escondido, CA, SIGA Plastics LLC is a family-owned plastic injection molding company. They offer comprehensive services from mold design and tooling to part production and assembly, specializing in custom plastic components. SIGA Plastics serves diverse sectors including the automotive, medical, consumer goods, and aerospace industries.

Little River Academy, TX

SignaMold & Design, LLC, based in Little River Academy, TX, specializes in plastic injection mold repair, new mold designs, fabrications, and custom tooling services. With extensive experience, they support production across diverse sectors, including automotive, energy, medical, and aerospace industries.

Shelby Township, MI

Summit Plastic Molding is a full-service injection molding supplier specializing in prototyping and production for automotive, medical, and defense sectors. They offer custom injection molding from 85 to 1000 tons, supported by extensive engineering, tooling, and manufacturing capabilities. The IATF-certified company operates facilities in Michigan and Texas.

Croix Falls, WI

Based in St. Croix Falls, WI, Thermal Plastic Design Inc. specializes in plastic injection molding and contract manufacturing. They provide precision tooling, rapid prototyping, and engineering design. Serving industries like automotive, electronics, and medical, the ISO 9001:2015 registered company produces components, including micro-gears.

Kenton, OH

Based in Kenton, OH, Pleasant Precision, Inc. is an IATF 16949:2016 certified injection molding facility. They produce high-quality parts for the automotive industry, utilizing electric molding machines and a Class 100,000 cleanroom. The company offers full-service tool making, supporting projects from design to finished molded products.

Gardena, CA

Based in Gardena, California, Techni-Mold & Engineering Inc. specializes in plastic injection molding, tool design, and mold making. With a 45,000 square foot facility, they produce precision thermoplastic components for diverse sectors. Their services include prototyping and high-volume production for the automotive, medical, aerospace, and consumer industries.

Valley View, TX

Based in Valley View, TX, T&R Tooling, LLC provides end-to-end plastic injection molding and custom tooling solutions. Services include design, prototyping, high-volume production, in-house and offshore mold building, and mold repair. They also offer post-molding services, 3D printing, and CNC machining prototyping.

Poughkeepsie, NY

Based in Poughkeepsie, NY, Uptive MFG offers rapid manufacturing services, including plastic injection molding and 3D printing. They provide custom-part development and solutions for medium to high-volume production runs, typically from 10,000 to 100,000 parts, alongside prototyping services. The company focuses on customer-centric service and expert guidance for manufacturability and scalability.

Cleveland, OH

Based in Cleveland, OH, USA Injection Molding is a full-service plastic injection molding facility. They provide comprehensive services from design and prototype creation to manufacturing and fulfillment of plastic components at competitive prices.

Valencia, CA

Based in Valencia, CA, Valencia Plastics, Inc. provides high-volume, custom plastic injection and blow molded parts. With over 20 years of experience, they manufacture custom components and containers, utilizing food-grade resins and up to 100% post-consumer recycled materials. The company is ISO 9001-2015 and cGMP certified.

East Hanover, NJ

Weiss-Aug is an ISO-certified manufacturer specializing in precision insert-molded parts and custom assemblies. They provide plastic injection molding, stamping, and assembly services for demanding applications across various industries, including the automotive sector.

Western Diversified Plastics (WDP) creates custom engineered plastic and electromechanical components for the global automotive industry. With over 35 years of experience, their in-house teams provide end-to-end solutions, from initial concept to validation and production, specializing in precision manufacturing for complex automotive challenges.

Addison, IL

Based in Addison, IL, Woodland Plastics Corporation specializes in custom thermoset plastic injection molding. ISO 9001:2015 and IATF 16949-aligned, they provide prototype to high-volume manufacturing for the automotive, appliance, and electrical industries. Capabilities include engineering support, robotics, and a focus on EV components and charging infrastructure.

West Henrietta, NY

Based in West Henrietta, NY, Forteq Precision Plastics specializes in producing precise plastic products with extensive automotive expertise. The company leverages plastic's lightweight properties to offer solutions that reduce vehicle weight, providing an all-in-one solution for automotive applications.

Upmold is an integrated manufacturer specializing in plastic injection molding and tooling. They provide design, production, and sales of plastic injection molds and parts, serving various markets including automotive, household appliances, and electronics. Upmold operates an injection molding factory in Indiana, USA.

Grand Rapids, MI

Agape Plastics, based in Grand Rapids, MI, is an IATF-certified, woman-owned company specializing in custom plastic injection molding and insert molding. With over 50 years of experience, they provide high-quality automotive injection molding solutions and post-mold assembly services, serving North American industrial customers.

Based in Meadville, PA, Allegheny Performance Plastics manufactures technically advanced functional plastic parts. The company specializes in processing high-performance, high-temperature polymers for demanding applications, making them a suitable partner for automotive injection molding needs. They offer precision polymer component manufacturing services.

Niles, IL

Based in Niles, IL, A.L.P. provides custom-molded components and precision OEM parts. The company offers expertise in design, tooling, and manufacturing, including various molding capabilities like injection molding. A.L.P. serves diverse markets such as automotive, aerospace, appliance, HVAC, and medical, providing comprehensive solutions.

Glendale, AZ

Based in Glendale, AZ, American Plastics Co provides ISO 9001-certified plastic injection molding services. They manufacture thermoplastic parts with presses ranging from 55 to 400 tons, utilizing engineering-grade resins like nylon, polycarbonate, ABS, and HDPE. The company offers complete support from engineering and design to tooling and post-molding assembly.

Chesterfield, MI

Based in Chesterfield, MI, BMI Corporation is an IATF 16949:2016 certified provider of plastic injection molding and contract assembly services. They primarily support Tier 1 and 2 automotive suppliers, offering product development, part decorating, and specialized secondary operations to meet diverse customer needs.

Century Mold Co., Inc. is a North American manufacturer with over 40 years of experience in precision-engineered plastic components. They provide design, engineering, and manufacturing for high-volume plastic parts, primarily serving automotive OEMs and Tier 1s. The company also supports defense and industrial/consumer markets.

Alvin, TX

Based in Alvin, TX, Coastal Plastic Molding Inc. is a family-owned plastic injection molding company, serving customers since 1984. They offer comprehensive services including in-house design, tooling, injection molding with modern JSW electric machines, quality inspection, assembly, and packaging.

Fallbrook, CA

Based in Fallbrook, CA, CORD Industries provides comprehensive plastic injection molding services, including insert molding and over molding. They offer integrated solutions from product design and prototyping to mold design, assembly, packaging, and shipping. With experience since 1975, they deliver high-quality parts for various industries.

Jacksonville, TX

Based in Jacksonville, TX, D & L Tooling & Plastics Inc. specializes in custom plastic injection molding services. They provide tooling design, manufacturing, and assembly for high-precision parts, serving diverse sectors including the automotive, medical, and electronics industries.

Hartland, WI

Based in Hartland, WI, Fathom MFG is a U.S. contract manufacturer with eight nationwide locations. They offer custom plastic injection molding, rapid tooling, and DFM services for prototype and production molds. Fathom supports diverse industries, providing components for sectors like automotive, including electric vehicles.

Battle Creek, MI

Based in Battle Creek, MI, I I Stanley Co., Inc. specializes in automotive lighting design and manufacturing. The company utilizes robotics in its molding department to produce single and multi-color lenses for automotive lighting components. I I Stanley is ITAF16949 certified, manufacturing high-quality headlamps, tail lamps, and fog lamps.

Costa Mesa, CA

Based in Costa Mesa, CA, J G Plastics Group LLC provides precision injection molding and mold making services. The company specializes in constructing tooling and molding demanding, close tolerance parts using scientific molding principles and extensive experience.

Nashville, TN

Based in Nashville, TN, Kasai North America, INC. is a Tier 1 automotive supplier. They specialize in precision injection molding for interior and exterior trim, producing components for overhead, body, door, and trunk systems. The company serves global automotive markets, from luxury cars to commercial vehicles.

Manitowoc, WI

Kaysun Corporation, Inc., based in Manitowoc, WI, specializes in custom injection molding for complex applications, serving major automotive OEMs. The company provides engineered excellence in its molding solutions, emphasizing a strong sustainability culture. Kaysun helps clients solve tough design and engineering challenges.

Kelco Industries, through its Advanced Molding Technologies (AMT) division, provides custom plastic injection molding services in the USA. They specialize in high-precision injection, insert, and over-molding of plastics, supporting projects from rapid prototyping to large-scale production. Kelco offers in-house engineering, 3D modeling, and holds AS9100/ISO certifications.

Sterling Heights, MI

Mayco International, based in Sterling Heights, MI, is a global Tier 1 automotive supplier. The company provides state-of-the-art interior modules, offering comprehensive services from pre-conceptualization, design engineering, and validation to manufacturing. They focus on quality, cost-effective parts that exceed customer expectations.

Simi Valley, CA

Based in Simi Valley, CA, Mold Precision Engineering is a full-service plastic injection molding company. They specialize in plastic part design, engineering, prototyping, and production. The company provides injection mold tooling and precise plastic components from its US facility for diverse industries.

Brea, CA

Based in Brea, CA, M.R. Mold & Engineering Corporation designs and manufactures liquid silicone rubber (LSR) and plastic injection molds. They also provide injection molding services, including micro molding, overmolding, and insert molding, producing plastic and silicone parts. The company serves OEMs and job shop molders.

Norwalk, CA

Based in Norwalk, CA, Petersen Molding Corporation specializes in custom plastic injection molding services. They offer comprehensive solutions from design and tooling to precision manufacturing for various industries, including automotive, medical, and consumer products. The company utilizes a range of thermoplastic materials to produce high-quality components.

Greer, SC

Based in Greer, SC, Plasman specializes in designing and producing premium automotive exterior trim solutions. Their capabilities include molding, assembly, and surface finishing for components such as roof rails, wheel flares, and mirror covers. The company provides tooling and advanced solutions for customers globally.

Redlands, CA

Based in Redlands, CA, Plastics Plus Technology Inc. is a woman-owned, USA contract manufacturer specializing in close-tolerance custom plastic injection molding. They serve automotive, medical, dental, and electronic components industries, providing value-added services and cradle-to-grave solutions. The company is ISO 9001:2015, ISO 13485:2016, and FDA Registered.

San Antonio, TX

Precision Group provides comprehensive tooling, molding, and engineering services, catering to the automotive, medical devices, consumer electronics, and energy sectors. They offer component and product guidance from conception to shipping, transforming design concepts into high-quality products using precision techniques.

Hartland, WI

Retlaw Industries, based in Hartland, WI, specializes in thermoplastic injection molding, providing OEM plastic parts for the automotive and transportation industries. With over 40 years of experience, 19+ machines, and 50,000 sq ft, they offer custom tooling, molding, and prototyping services. The company is ISO certified.

Glendora, CA

Based in Glendora, CA, Southwest Plastics Co. specializes in diverse plastic molding services. They offer thermoplastic injection molding, precision thermoset molding, transfer molding, and compression molding, creating durable, high-performance components for demanding applications. Additional services include CNC machining, tooling, and assembly.

Brownsville, TX

Based in Brownsville, TX, Standard Mold USA is a full-service supplier offering plastic injection molded products. They also provide comprehensive tool manufacturing and repair services for industrial clients. Holding ISO 9001:2015 and IATF 16949 certifications, the company is well-qualified to serve the demanding automotive industry.

Fort Worth, TX

Based in Fort Worth, TX, Superior Plastics offers plastic injection molding and mold building services. They utilize diverse equipment and processes, working with commodity, engineering, and high-temperature resins. The company holds ISO 9001:2015 and AS9100D certifications, serving industrial, military, and electronics sectors.

Houston, TX

Based in Houston, TX, Texas Injection Molding offers custom plastic injection molding services for OEM manufacturing and consumer products. They provide product design assistance and engineering services, serving diverse sectors including business electronics, medical, and industrial. Committed to modern equipment and process control, they deliver quality parts.

Avon Lake, OH

Based in Avon Lake, OH, Thogus is an established, family-owned high-volume custom plastic injection molder. The company provides advanced automotive injection molding services and electronic subassemblies for a wide range of vehicle parts.

Shelbyville, IN

Thunderbird Molding specializes in high-precision custom plastic injection molding and contract manufacturing services from multiple US facilities. They provide comprehensive solutions, including mold design, prototyping, engineering, production, and assembly. The company focuses on helping clients realize cost improvements and reach their performance potential.

Goshen, IN

Based in Goshen, IN, Triangle Rubber & Plastics manufactures plastic-molded exterior trims for automotive industry partners. The company specializes in providing custom rubber and plastic components, operating from multiple production facilities.

San Diego, CA

Based in San Diego, CA, ARRK North America, Inc. specializes in comprehensive product development, offering custom manufacturing services from rapid prototyping to full production. They employ advanced injection molding processes to support clients in accelerating their products to market, leveraging extensive knowledge and capabilities.

Arkal Automotive specializes in designing, developing, and manufacturing lightweight systems for the automotive industry. Using advanced plastic injection molding technologies, the company produces components for thermal management, fluid management, and interior/exterior systems. Arkal serves major OEMs and Tier 1 customers from its facilities in the United States.

Portage, MI

Based in Portage, MI, Custom Design, Inc. specializes in designing and manufacturing custom molds and tooling for injection molded parts. They primarily serve automotive tier 1 suppliers, along with the industrial, construction, and medical industries. The company ships across North America, including Mexico.

Novi, MI

Macauto Group specializes in automotive injection molding, producing a wide array of interior trims for leading automobiles. Their comprehensive capabilities include tooling design, injection molding, painting, laser etching, and assembly of components like door panels and consoles. They operate a manufacturing facility in Novi, MI.

Chino, CA

Precision Tool & Plastics, LLC, based in Chino, CA, specializes in custom plastic injection molding and precision tooling services. They provide comprehensive product development, secondary operations, and assembly services. Serving industries like automotive, medical, and aerospace, the company delivers high-quality molded products from initial concept through to completion.

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How to Choose a Company

  • Verify their documented PPAP Level capabilities and track record for successful submissions, understanding that Level 3 is standard for most production parts, but OEM-specific requirements can elevate this to Level 4 or 5.
  • Insist on IATF 16949 certification, not just ISO 9001, as it demonstrates adherence to automotive-specific quality management system requirements, including proficiency in core tools (APQP, FMEA, MSA, SPC).
  • Clarify tooling ownership and maintenance agreements upfront, ensuring robust preventative maintenance schedules and clarity on who bears the cost for tooling modifications or repairs over the program's lifecycle, especially for multi-year vehicle platforms.
  • Scrutinize their Design for Manufacturability (DFM) process; a red flag is a supplier who accepts CAD designs without critical analysis of draft angles, gate locations, or potential warpage issues, indicating a lack of proactive problem-solving.
  • Assess their expertise with specialized materials and processes relevant to your application, such as high-temperature engineering plastics for powertrain components, or two-shot molding capabilities for integrated seals and aesthetic bezels.

Supplier Types at a Glance

TypeBest ForTypical MOQ
Prototype & Low-Volume SpecialistInitial design validation, small batch runs for specialty vehicles, or intricate concept models requiring rapid iteration and specialized engineering resins.1 to 1,000 pieces
Mid-Volume Tier 2 SupplierEstablished programs requiring consistent production, often for sub-assembly components or non-critical parts, with a focus on cost-efficiency and reliable delivery.1,000 to 100,000 pieces
High-Volume Tier 1 / Integrated Solutions ProviderLarge-scale OEM programs, complex assemblies, critical components requiring full IATF 16949 compliance, advanced automation, and sophisticated quality control systems.100,000+ pieces annually
Niche Material / Process ExpertProjects demanding specific material expertise (e.g., PEEK, composites, bio-plastics) or specialized processes like two-shot molding, gas-assist, or insert molding for unique functional requirements.Varies significantly based on specialization, often mid to high volume

Frequently Asked Questions

What is PPAP and why is it so critical for automotive injection molded parts?

PPAP (Production Part Approval Process) is a rigorous validation framework that ensures a supplier can consistently produce parts meeting all customer requirements at stated production rates. For automotive injection molding, it's essential because it verifies process stability, dimensional accuracy, material compliance (including IMDS submissions), and overall quality before mass production begins, mitigating costly recalls or line shutdowns.

How does IMDS compliance affect material selection and sourcing for automotive plastic components?

IMDS (International Material Data System) is crucial for tracking and reporting the material composition of every component within a vehicle, ensuring compliance with global environmental regulations (like ELV, RoHS, REACH). Suppliers must provide accurate IMDS submissions for each plastic resin, additive, and colorant used, impacting material approval and requiring them to partner with resin manufacturers who can provide this detailed data.

What are common causes of warpage or dimensional instability in automotive injection molded parts, and how do suppliers prevent it?

Warpage and dimensional instability often stem from uneven cooling, material shrinkage variations, or poor part design (e.g., non-uniform wall thickness). Experienced suppliers prevent this through mold flow analysis during DFM, optimized gate placement, balanced cooling channel design, precise process control (injection speed, holding pressure, mold temperature), and careful material selection to minimize anisotropic shrinkage.

What's the difference between a supplier offering 'tooling ownership' versus 'tooling services' for automotive projects?

When a supplier offers 'tooling ownership,' it typically means they design, build, and maintain the mold, often factoring its cost into piece price or as a separate upfront charge, but the buyer retains ultimate intellectual property and physical ownership of the tool. 'Tooling services' might imply they are simply facilitating the tool build with a third party, without necessarily holding the long-term responsibility for its upkeep or guaranteeing its lifecycle for your project. Always ensure clear ownership, comprehensive maintenance schedules, and end-of-life plans for tools to avoid disputes or unexpected costs.

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