Custom Injection Molding - Automotive
Sonoco provides custom injection molding services to make plastic parts and components for virtually any product application across a range of industries. Businesses who demand the best use our custom injection-molded plastics in a wide variety of products, from surgical-grade medical devices to highly technical automotive components.
Extrusion
Sonoco provides custom extruded plastic core solutions for various winding applications up to 8” in diameter with various lengths and wall thickness. With the ability to extrude in PE, PP, PS & ABS resins, we offer a range of solutions for the most demanding applications with a focus on sustainability.
From Concept to Completion
Whether you’re using custom plastic injection molding or extrusion to manufacture medical devices more efficiently, to prevent contamination of apparel products, or to reduce the weight of car parts and components, Sonoco has the experience, expertise and craftsmanship to ensure the success of your project.
Guiding customers through every stage of a custom precision molding project, our comprehensive approach includes advanced design and engineering assistance, mold making, prototyping, real-world testing and automated assembly services.
Purpose-Driven Innovation
At Sonoco, we believe in harnessing the power of process to drive innovation. Our proprietary i6 Innovation Process leverages market insights with advanced technical expertise to fully imagine, test, produce and deliver 360-degree solutions. While innovation demands creativity, free-thinking, and imagination, the i6 Innovation process gives it direction, power, and purpose. Adhering to this disciplined approach is vital to helping solve problems and consistently deliver repeatable, scalable custom plastic injection molding and extrusion services for our customers.
Custom Automotive Injection Molding Services: Precision-Molded Plastic Components Designed for Performance
For over 35 years, Sonoco has specialized in delivering high-quality injection molded plastic components for the automotive industry. From complex interior assemblies to high-performance electrical system parts, we provide comprehensive manufacturing solutions—including tooling, production and multi-part assembly. Whether you’re launching a new vehicle platform or scaling an existing program, our team ensures performance, compliance and efficiency at every stage.
Industry Spotlight—Automotive
- Our Capabilities
- Comprehensive Manufacturing Support
- Why Leading Automotive Brands Choose Sonoco
Our Capabilities
We manufacture injection molded plastic parts tailored to your specifications, with expertise across a wide range of component types and production requirements:
- Interior Class A finish components
- Electrical wiring system parts
- Speaker enclosures and mounts
- High-speed automation molding
- Laser printing and etching
- High-quality painted finishes
- Multi-piece component assembly
- Fuse/collar component installation
- Insert molding and overmolding
- Living hinge design and production
- Auxiliary camera-integrated quality assurance
All parts are manufactured to meet strict automotive compliance standards and performance tolerances.
Comprehensive Manufacturing Support
At Sonoco, we do more than molding. Our full-service manufacturing capabilities support your program from tooling through final assembly:
- Tooling and mold construction
- Engineering for manufacturability
- Precision injection and insert molding
- Assembly, finishing, and packaging
- On-site inspection and quality assurance
We work closely with OEMs and Tier 1 suppliers to develop plastic components that meet exacting mechanical, cosmetic and regulatory demands—on time and on budget.
Why Leading Automotive Brands Choose Sonoco
- Over 35 years of industry experience
- 40,000 sq. ft. climate-controlled facility in Wixom, MI
- 18 automated molding machines with insert molding and high-speed capabilities
- Laser and paint equipment for advanced finishing
- AI-assisted vision systems for in-line quality control
- Multi-process integration for efficient assembly
Our skilled engineers and production specialists are ready to support your program with the precision and reliability your industry demands.
Sebro Plastics has been a trusted supplier to SEWS for nearly 20 years. Their commitment to quality, technical know-how, and responsive service consistently help us meet the evolving demands of the automotive industry. From concept to delivery, Sebro feels like an extension of our own team—and that’s what makes the relationship so valuable.
Bring Your Custom Injection Molding or Extrusion Project to Life
Ready to transform your vision into reality? Describe your custom injection molding or extrusion on the form below.