California is a powerhouse for innovation in manufacturing, particularly in the plastic injection molding sector. With its proximity to tech hubs like Silicon Valley and medical clusters in San Diego and Orange County, the state hosts some of the most advanced plastic injection molding companies in California. These firms specialize in everything from high-volume production to precision medical components, serving industries like medical devices, electronics, and diagnostics.
If you're searching for reliable plastic injection molding companies in California, this comprehensive guide highlights key players, industry trends, and why Trademark Plastics Inc. (TPI) stands out as a leader in medical-grade solutions. We'll explore factors to consider when choosing a partner, provide a curated list of top companies, and offer actionable insights to help you make an informed decision.
Why Choose Plastic Injection Molding Companies in California?
California's ecosystem makes it an ideal location for plastic injection molding. The state benefits from skilled labor, cutting-edge technology, and stringent regulatory standards, which are crucial for high-stakes applications like medical devices. Plastic injection molding companies in California often emphasize:
• Regulatory Compliance: Proximity to FDA oversight ensures alignment with standards like ISO 13485 and 21 CFR Part 820.
• Innovation and Precision: Access to advanced tools like CT scanners and scientific molding techniques for tolerances down to 0.0005 inches.
• Supply Chain Efficiency: Local production reduces lead times and logistics costs, especially for California-based OEMs.
• Sustainability Focus: Many firms incorporate recycled materials to meet California's environmental regulations.
According to industry reports from Research and Markets, the global injection molding market is set to reach $426.7 billion by 2032, growing at a CAGR of 4.6% from 2025 to 2032, driven by demand in packaging, automotive, and electronics sectors, and advancements in material technologies. Factors like cleanroom facilities, vertical integration, and global reach set top plastic injection molding companies in California apart from competitors elsewhere.
Leading Plastic Injection Molding Companies in California
Based on expertise, facilities, certifications, and market presence, here's a curated list of notable plastic injection molding companies in California. This selection draws from industry directories like IQS Directory and CMTC, focusing on those with strong reputations in precision and medical applications.
1. Trademark Plastics Inc. (TPI) - Riverside, CA
Founded in 1989, TPI is a standout among plastic injection molding companies in California, specializing in custom medical device components. With a 100,000-square-foot facility and over 100 employees, TPI offers vertical integration from design to production. Key strengths include ISO Class 8 cleanrooms, 51 injection molding machines (6-610 tons), and tolerances as tight as 0.0005 inches for IVD supplies and microfluidic chips. Certifications: ISO 13485, MedAccred, FDA-compliant. TPI serves 8 of the top 30 global medical device manufacturers and has facilities in the US and China for global scalability.
2. Precision Molded Plastics - Upland, CA
A high-volume molder focused on quality and customer service, Precision Molded Plastics excels in custom plastic parts for various industries, including medical and consumer goods. They emphasize rapid prototyping and ISO 9001 certification, making them a reliable choice among plastic injection molding companies in California.
3. Advance Plastics - Colton, CA
With decades of experience, Advance Plastics provides full-service injection molding, including tooling and assembly. They're known for serving aerospace, automotive, and medical sectors, with a focus on precision and quick turnaround times.
4. Valencia Plastics - Valencia, CA
Specializing in high-precision molding for electronics and medical applications, Valencia Plastics offers cleanroom capabilities and ISO 13485 compliance. They're a go-to for complex geometries among plastic injection molding companies in California.
5. Westec Plastics - Livermore, CA
Established in 1969, Westec is ISO 13485:2016 certified and specializes in medical injection molding. Their San Francisco Bay Area location supports cleanroom production, making them competitive in healthcare and life sciences.
6. JATCO - Union City, CA
With over 40 years in the industry, JATCO offers production, assembly, and distribution across multiple sectors. As one of the established plastic injection molding companies in California, they focus on high-quality outputs and custom solutions.
7. Hi-Rel Plastics & Molding - Riverside, CA
Located in Riverside like TPI, Hi-Rel provides custom molding with an emphasis on precision and reliability. They're a strong option for defense and medical applications among plastic injection molding companies in California.
8. JG Plastics - Costa Mesa, CA
JG Plastics specializes in thermoset and thermoplastic molding, with expertise in medical and aerospace. Their Orange County base supports rapid prototyping and high-precision work.
9. Acorn-Gencon Plastics - Chino, CA
Focusing on engineering-grade plastics, Acorn-Gencon offers injection molding for industrial and medical uses. They're known for material expertise and cost-effective solutions.
10. AAIMS Molding - Anaheim, CA
AAIMS provides custom injection molding with a focus on automation and efficiency. Their Southern California location serves electronics and medical clients with ISO-certified processes.
For a quick comparison:
|
Company |
Location |
Key Specialties |
Certifications |
|
Trademark Plastics Inc. (TPI) |
Riverside |
Medical micro molding, IVD, cleanrooms |
ISO 13485, MedAccred |
|
Precision Molded Plastics |
Upland |
High-volume production |
ISO 9001 |
|
Advance Plastics |
Colton |
Tooling, assembly |
ISO 9001 |
|
Valencia Plastics |
Valencia |
High-precision electronics/medical |
ISO 13485 |
|
Westec Plastics |
Livermore |
Medical molding |
ISO 13485:2016 |
|
JATCO |
Union City |
Assembly, packaging |
Not specified |
|
Hi-Rel Plastics & Molding |
Riverside |
Custom precision molding |
Not specified |
|
JG Plastics |
Costa Mesa |
Thermoset/thermoplastic |
ISO-certified |
|
Acorn-Gencon Plastics |
Chino |
Engineering-grade plastics |
Not specified |
|
AAIMS Molding |
Anaheim |
Automation, efficiency |
ISO-certified |
Deep Dive: Medical Micro Molding Expertise at Trademark Plastics Inc. (TPI)
Among plastic injection molding companies in California, TPI excels in medical micro molding—a specialized process for sub-millimeter components with micron tolerances. This is essential for IVD cartridges, microfluidic chips, implantable parts, and wearable sensors.
What is Medical Micro Molding?
Medical micro molding involves specialized presses for tiny shot volumes, tight temperature control, and in-line metrology. Compared to standard molding, it handles features under 1 mm with biocompatibility and sterility. TPI's capabilities include:
• Dimensional tolerances: ≤ 10 μm (0.0005 inches).
• Minimum feature size: < 0.5 mm, down to single-digit microns.
• Shot weight: Fractions of a gram.
• Process controls: Cavity pressure monitoring and traceable lot control.
Common Materials and DFM Guidelines
TPI works with polycarbonate (PC), PEEK, PPSU, polyurethanes, and low-extractable resins. Design for Manufacturability (DFM) tips include uniform walls, tuned gates, and draft angles to avoid thin sections.
Tooling, Validation, and Applications
Using wire-EDM and scientific molding, TPI ensures IQ/OQ/PQ validation in ISO 13485-aligned cleanrooms. Applications span IVD cartridges, hearing aids, and micro optics.
TPI's multidisciplinary team—RJG Master Molders, Lean Six Sigma Black Belts—drives innovation, reducing time-to-market. Customer feedback: "TPI's vertical integration ensures compliance and consistency."
Choosing a Partner: Checklist for Plastic Injection Molding Companies in California
When evaluating plastic injection molding companies in California:
• Micro molding experience with medical parts.
• ISO 13485 and in-house tooling/metrology.
• Cleanroom and validation capabilities.
• Rapid prototyping options.
TPI meets all criteria, positioning it as a top choice.
Conclusion
Among plastic injection molding companies in California, Trademark Plastics Inc. (TPI) leads in medical micro molding with its expertise, facilities, and compliance. For high-precision needs, visit trademarkplastics.com or contact cs@trademarkplastics.com / (951) 231-1480. Engage early for optimal results.
