Custom Plastic Mold Injection Services in California
Southern California's Premier Injection Molding Company | Large Tonnage Specialists Since 1974
88,000 sq. ft.
PLASTIC MOLD INJECTION FACILITY
LOCATED IN CHINO, CA
25 Presses
CUSTOM INJECTION MOLDING
30 ton - 2800 ton
24/7
SOUTHERN CALIFORNIA INJECTION MOLDING
SERVING RIVERSIDE, ORANGE & LA
ABOUT NORCO PLASTICS
PRECISION PLASTIC MANUFACTURING SINCE 1974
Founded in 1974 by the Williams family in Norco, California, our company has grown from a small operation with just two machines to become one of Southern California's leading injection molding specialists. Today, the second generation of the Williams family continues this legacy of excellence from our 88,000 sq. ft. Chino facility, serving businesses throughout Los Angeles, Riverside, Orange County, and San Diego with custom injection molding solutions.
Over five decades, we've continually invested in advanced technology, expanding from small-scale production to include plastic mold injection with large tonnage capacity up to 2800 ton—a milestone achieved in 2023 with our newest press installation. This commitment to growth, combined with our 24/7 operation and 50 years of technical expertise as plastic manufacturers in California, allows us to deliver exceptional quality and precision that other manufacturers simply cannot match.
Plastic Mold Injection Machinery
As leading injection molding companies in California, our facility houses 25 precision plastic mold injection machines ranging from 30 to 2800 ton of clamping force, with shot capacity up to 1000 oz. This versatile equipment enables us to be one of Southern California's premier injection molding providers with 24/7 production capabilities.
Whether you need custom injection molding for small precision components or large-scale parts, our services deliver consistent quality that plastic manufacturers in California rely on. Our advanced technology and experienced team ensure superior results for injection molding California projects of any size.
Custom Injection Molding Solutions
Custom Injection Molding Solutions
California Injection Molding Solutions
Our Southern California facility delivers high-quality components for multiple industries throughout Los Angeles, Riverside, San Diego, and Orange County. With over 50 years of expertise in plastic mold injection and custom injection molding, we provide precision solutions backed by comprehensive quality control systems.
Construction & Infrastructure
We produce high-performance molded components for the construction industry including weather-resistant barriers, specialized fittings, and structural supports through our custom injection molding services.
Our expertise in tooling and plastic mold injection technology delivers durable pond supply components, waterfalls, skimmer filters, and infrastructure elements designed to withstand demanding environments throughout Southern California.
- Weather-resistant components for outdoor applications
- Pond supply systems and water management solutions
- Structural supports with superior load-bearing capacity
- Serving Southern California construction projects
Storage & Logistics Solutions
We manufacture high-impact storage totes, bins, and customized container systems using advanced plastic mold injection processes engineered for modern logistics and supply chain operations.
Our precision-molded products feature reinforced corners, exact dimensions, and stackable designs that optimize warehouse space and improve inventory management for California businesses.
- Reinforced corners for maximum durability
- Stackable designs to optimize warehouse space
- High-impact resistance for demanding logistics environments
- Custom injection molding solutions for Southern California distribution centers
Housewares & Consumer Products
We create food-grade plastic housewares, baby products, and pet supplies manufactured with BPA-free materials through custom injection molding processes by experienced plastic manufacturers in California.
From retail packaging to premium household items, our plastic mold injection technology delivers components with exceptional durability and heat resistance that enhance brand recognition and consumer satisfaction.
- BPA-free materials for food contact applications
- Premium color matching for brand consistency
- Heat-resistant and dishwasher-safe components
- Ergonomic designs for consumer satisfaction
Irrigation & Agricultural Components
Our custom irrigation solutions feature UV-stabilized materials designed to withstand harsh outdoor conditions while maximizing water efficiency through precision injection molding techniques.
We produce durable components for farm equipment, precision irrigation systems, and livestock management that help Southern California agricultural businesses operate more efficiently with plastic molding California farmers trust.
- UV-stabilized materials for outdoor durability
- Water-efficient designs for sustainable farming
- Temperature-resistant for extreme weather conditions
- Custom solutions for California agriculture
Automotive Components
We manufacture high-performance automotive plastic parts using precision injection molding techniques that meet rigorous industry standards for California's automotive sector.
From interior components to under-hood applications, our plastic mold injection services produce parts with tight tolerances and excellent durability to meet automotive specifications that injection molding companies must maintain.
- Tight tolerances for precise component fitting
- Heat-resistant materials for under-hood applications
- Complex geometries for modern vehicle designs
- Quality control systems for automotive standards
Non-Invasive Medical Components
We manufacture non-invasive medical components such as storage trays, transport containers, and external device housings for the healthcare industry using custom injection molding services in California.
Our plastic manufacturing services provide storage and delivery solutions with the cleanliness and consistency required by medical facilities while ensuring full compliance with relevant standards for healthcare applications.
- Medical-grade materials for healthcare applications
- Precision manufacturing for consistent quality
- Cleanroom production capabilities when required
- Regulatory compliance for healthcare standards
Quality Control for Custom Injection Molding
Precision Measurement for Plastic Manufacturing
Our Chino facility features advanced quality control technology including the Brown and Sharpe CMM for precise dimensional verification of plastic mold injection components. We implement Statistical Process Control (SPC) monitoring throughout production to ensure consistent results that meet injection molding companies standards. From incoming materials to final inspection, our quality system verifies every component meets exact specifications, delivering superior custom injection molding products. With over 50 years of experience as plastic manufacturers in California, we provide exceptional quality for all your injection molding projects throughout Southern California.
50 Years of Manufacturing Excellence in California
Our family-owned company brings over 50 years of expertise to every project, combining precision injection molding with exceptional quality. We offer comprehensive manufacturing solutions from concept to completion with large tonnage equipment up to 2800 ton. Serving diverse industries throughout Southern California, our 24/7 production and robust quality system ensure reliable delivery of high quality products that meet your exacting standards.
Get a Custom Manufacturing QuoteNeed Precision Plastic Manufacturing in Los Angeles, Riverside, San Diego & Orange County?
Contact us about your next plastic manufacturing project. Our team specializes in custom plastic injection molding with large tonnage equipment up to 2800 ton and 24/7 production capabilities. We deliver high quality products backed by over 50 years of experience and comprehensive quality management systems. Let us put our expertise to work for your business needs.
(909) 393-4000 
