Custom Automotive Plastic Injection Molding
Automotive components must perform across wide temperature ranges, resist chemical exposure, and meet strict dimensional tolerances across every production run. A supplier that delivers inconsistent parts creates downstream problems on your assembly line, including delays, rework, and warranty risk.
Cary Products supplies custom plastic injection molding and thermoforming to automotive and power-sports manufacturers from our facility in Hutchins, Texas. For over 75 years, we have produced precision plastic components for manufacturers serving passenger vehicle, commercial vehicle, and power-sports markets. We hold ISO 9001:2015 certification across all production operations.
If your program requires a domestic supplier with a proven track record in automotive plastic manufacturing, our team is ready to review your parts.
Plastic Components We Produce for Automotive Applications
Automotive and power-sports manufacturers rely on injection molded plastic parts across a wide range of vehicle systems and assemblies. Our team produces custom components for OEMs and Tier 1 and Tier 2 suppliers serving passenger cars, commercial trucks, and power-sports vehicles. Common automotive applications include:
HVAC and Climate System Components
Ducts, vents, housings, and air movement components for vehicle HVAC and MVAC systems. We select materials for thermal stability and dimensional consistency in high-temperature under-dash and under-hood environments.
Interior Trim and Panel Components
Custom bezels, trim pieces, panel inserts, and housing covers for vehicle interiors. We produce these components with consistent surface finish and color repeatability across high-volume production runs.
Under-Hood Components
Fluid reservoir housings, bracket assemblies, connector covers, and protective enclosures for under-hood applications. We design each part to withstand engine heat, fluid exposure, and vibration.
Sensor and Electronics Housings
Protective housings for sensors, control modules, and electronic assemblies used in vehicle systems. Tight dimensional tolerances ensure consistent fit during vehicle assembly.
Power-sports and Specialty Vehicle Components
Custom injection molded parts for ATVs, UTVs, and specialty vehicle applications. Our team has direct experience producing components for power-sports programs requiring durable, lightweight plastic parts for demanding field conditions.
Structural Brackets and Clips
Mounting clips, brackets, and fastening components for vehicle assembly lines. We produce these in high volumes with the dimensional consistency required for automated assembly processes.
In particular, injection molded plastic components reduce vehicle weight compared to metal alternatives, supporting fuel efficiency and emissions targets without sacrificing structural performance.
Custom Injection Molding for Automotive OEMs
Automotive programs require tight tolerances, validated materials, and documented quality systems that support OEM supplier requirements. Custom injection molding delivers precision plastic components that meet these standards at production volumes.
Your engineering team submits part drawings or CAD files along with material specifications, performance targets, and environmental requirements. Our molding engineers review wall thickness, gate locations, draft angles, and parting line positions to optimize each mold design for your part geometry and production volume.
This review process, called Design for Manufacturing, identifies potential quality issues before tooling begins. We also evaluate material selection during this phase, recommending resins that meet your requirements for heat resistance, chemical exposure, and impact strength.
We produce all tooling in-house at our Hutchins facility using CNC milling, EDM machining, and micro welding. In-house tooling control shortens lead times and allows design modifications to be made quickly when program requirements change.
Once tooling is validated, production transitions to full volume runs. View our full plastic manufacturing capabilities, including 28 injection molding machines ranging from 97 to 700 tons of clamping force.
Design and Engineering Support
Automotive OEM programs often require close collaboration during the product development phase. Our design and engineering team works directly with your engineers to translate vehicle performance requirements into manufacturable plastic components. Services include:
DFM Review: evaluation of part geometry for injection molding manufacturability before tooling is ordered
3D CAD Modeling: detailed modeling to confirm part design and mold flow before production
Material Selection: guidance on resin selection based on automotive thermal, chemical, and impact requirements
Prototype Development: pre-production prototyping to validate part performance before committing to full tooling investment
Moreover, early supplier involvement in the design process reduces development timelines and lowers the risk of costly engineering changes after tooling is built.
ISO 9001:2015 Quality for Automotive Manufacturers
Automotive supply chains require documented quality systems and traceable production records. Cary Products is ISO 9001:2015 certified, with a quality management system covering all production operations from incoming material inspection through final shipment. ISO 9001:2015 is the foundation of automotive quality standards, published by the International Organization for Standardization.
Our quality team also monitors every stage of production using statistical process control and in-process inspection to ensure parts meet dimensional and cosmetic specifications on every run.
We maintain lot traceability and documented inspection records for all production runs. We also provide first article inspection reports and material certifications to support your supplier qualification and PPAP documentation requirements.
Frequently Asked Questions
What types of automotive components does Cary Products manufacture?
We produce custom injection molded components for passenger vehicle, commercial vehicle, and powersports applications. This includes HVAC components, interior trim, under-hood parts, sensor housings, structural brackets, and specialty vehicle components. Contact our team to discuss your specific program.
What quality documentation do you provide for automotive supplier qualification?
We provide first article inspection reports, material certifications, and lot traceability records for all production runs. Our ISO 9001:2015 certified quality management system supports the documentation requirements of automotive OEM supplier qualification processes.
What is the typical lead time for a new automotive injection molding program?
Lead times vary based on part complexity, tooling requirements, and order volume. Contact our sales team directly for a program-specific estimate.
What production volumes do you support for automotive manufacturers?
We support programs ranging from short production runs to high-volume annual supply agreements. For most programs, injection molding becomes most cost-effective at higher volumes. However, our team evaluates each program individually and recommends the right approach for your needs.
Does Cary Products have experience with power-sports and specialty vehicle programs?
Yes. We have direct production experience with powersports components for ATV and UTV applications, including programs that require safety stock and flexible delivery schedules to support seasonal demand patterns.
Ready to Discuss Your Automotive Program?
Cary Products works directly with automotive OEM engineering and procurement teams to support new component development, production ramp-up, and long-term supply programs. Our team is available to review part drawings, discuss material requirements, and provide pricing and lead time information.