Injection molding is a high-precision manufacturing process used to produce plastic parts by injecting molten thermoplastic material into a custom-designed mold cavity. Once cooled and solidified, the part is ejected in a finished or near-finished state, enabling high repeatability, tight tolerances, and efficient mass production.
Hi-Rel Plastics & Molding Corp. is an ISO 13485:2016, ISO 9001:2015, and AS9100 Rev D certified top of the line custom plastic injection molding company providing precision manufacturing solutions to customers throughout Southern California, Northern California, the Los Angeles metropolitan area, and across the USA. As one of the leading plastic injection molding companies in or near Southern California, we specialize in custom plastic injection molding services, precision engineering, mold manufacturing, and assembly for industries requiring exceptional quality, reliability, and responsive customer service. We deliver complete turnkey manufacturing solutions for OEMs and product manufacturers.
As a trusted plastics manufacturer headquartered in Riverside, California, Hi-Rel offers small, medium, and high-volume plastic injection molding backed by more than 40 years of manufacturing experience. Our advanced manufacturing facility supports customers searching for plastic injection molding contract manufacturers or custom plastic components manufacturing companies. We serve as a single-source supplier under one roof, providing engineering, mold manufacturing, production, assembly, and logistics support throughout every stage of the manufacturing process.
Our experienced engineering team collaborates closely with customers to optimize product designs using Design for Manufacturability (DFM), Mold Flow Analysis, rapid prototyping, precision tooling, and production mold development. By combining engineering expertise with advanced processing technologies, we help reduce manufacturing costs, improve part quality, shorten development cycles, and accelerate time-to-market.
Our clean manufacturing environment and quality management systems make Hi-Rel a trusted partner for medical device contract manufacturing, medical device injection molding, cleanroom injection molding services, and cleanroom assembly or packaging for healthcare and life science applications. Our commitment to quality, continuous improvement, and personalized customer service has established Hi-Rel as one of the preferred aerospace, automotive or industrial plastic parts manufacturers and injection molded plastic parts manufacturing companies serving customers. Whether your project requires prototype development, low-volume production, or high-volume manufacturing, our experienced team delivers consistent quality, competitive pricing, and dependable on-time delivery.
Hi-Rel serves customers throughout Los Angeles, Orange County, San Diego, Inland Empire, Ventura, Santa Barbara, Riverside, San Bernardino, Sacramento, San Jose, Oakland, San Francisco, Silicon Valley, Northern California, Southern California, and throughout the United States with dependable manufacturing, inventory management, and logistics support.
If you’re searching for an injection mold making company, injection molding tooling company, or a USA contract manufacturer capable of producing high-quality custom plastic components, Hi-Rel Plastics & Molding Corp. is ready to support your next project.
Contact Hi-Rel Plastics & Molding Corp. today to discuss your custom plastic injection molding, mold manufacturing, engineering, assembly, and production requirements. From concept through production, we provide the expertise, advanced manufacturing technologies, and customer-focused service needed to bring innovative products to market efficiently, economically, and with confidence.
