Hi-Rel Plastics & Molding Corp. provides custom plastic molding, tooling, metal parts manufacturing, assembly and secondary manufacturing services for agricultural equipment manufacturers, farming equipment OEMs, irrigation system manufacturers and agricultural technology companies throughout California and across the United States.
With more than 40 years of manufacturing experience and ISO 9001:2015, AS9100 Rev D and ISO 13485:2016 certifications, Hi-Rel Plastics & Molding supports agricultural manufacturing programs from early product development and prototyping through mold manufacturing, production, assembly and secondary operations.
Our extensive manufacturing capabilities include plastic injection molding, blow molding, liquid silicone rubber (LSR) injection molding, thermoforming, vacuum forming, rotational molding, mold and tool manufacturing, custom plastic and metal parts manufacturing, mechanical assembly, cable assembly, ultrasonic welding and a variety of value-added secondary services.
Whether the application involves irrigation, precision agriculture, crop management, planting equipment, livestock systems, greenhouse equipment, agricultural electronics or heavy farming machinery, Hi-Rel Plastics & Molding can manufacture durable custom components engineered for demanding agricultural environments.
Modern agricultural equipment increasingly relies on engineered plastic and elastomeric components to reduce weight, resist corrosion, withstand chemicals and weather exposure, simplify assembly and provide economical alternatives to traditional materials.
Hi-Rel Plastics & Molding works with agricultural OEMs and product manufacturers to produce custom components for new equipment as well as replacement or redesigned parts for existing agricultural systems.
Agricultural components may encounter prolonged UV exposure, moisture, dirt, vibration, impact, fertilizers, pesticides, fuels, oils, chemicals and significant temperature fluctuations. Material selection, component design and manufacturing process therefore play important roles in long-term field performance.
Hi-Rel Plastics & Molding provides material selection and manufacturing support based on each application’s mechanical, chemical, environmental and production requirements.
Engineered to withstand harsh outdoor environments, including moisture, UV exposure, and temperature changes.
Materials selected to perform under exposure to fertilizers, pesticides, and heavy use.
Parts manufactured for reliable performance in agricultural machinery and systems.
Efficient production processes to support both custom and high-volume equipment needs.
Our custom plastic injection molding services support precision agricultural components ranging from small fittings and clips to larger housings and structural components.
Agricultural injection molding applications can include:
Hi-Rel Plastics & Molding supports prototype, low-, medium- and high-volume injection molding programs and can incorporate insert molding, overmolding and other specialized molding processes when required.
Custom blow molding provides an efficient manufacturing solution for hollow agricultural components, bottles, containers, reservoirs and fluid-handling products.
Hi-Rel Plastics & Molding supports extrusion blow molding (EBM), injection blow molding (IBM) and injection stretch blow molding (ISBM), providing agricultural equipment and product manufacturers with flexibility across different component designs and applications.
Potential agricultural blow molded products include:
Secondary operations such as trimming, leak testing, decorating, labeling, assembly, filling and sealing can also be incorporated depending on project requirements.
Liquid silicone rubber provides excellent flexibility, sealing performance and environmental resistance for agricultural equipment operating outdoors or around water and chemicals.
Hi-Rel Plastics & Molding’s LSR molding capabilities can support components such as:
LSR can be particularly valuable for agricultural systems requiring reliable sealing across varying temperatures and demanding environmental conditions.
Thermoforming and vacuum forming provide economical solutions for producing larger plastic parts, panels, trays, covers and enclosures.
Agricultural applications may include:
These processes can provide an economical alternative to injection molding for larger components or applications where projected production quantities do not justify conventional injection molding tooling.
Rotational molding is particularly well suited for large, durable, hollow agricultural components.
Potential applications include:
Rotational molding can provide seamless hollow construction, durability and design flexibility for demanding outdoor agricultural applications.
Successful agricultural production starts with dependable tooling.
Hi-Rel Plastics & Molding provides mold and tooling support for injection molding, LSR molding, blow molding, thermoforming, vacuum forming and rotational molding programs.
Our manufacturing team can assist with:
Combining tooling and production support helps agricultural OEMs streamline the transition from product design to repeatable production.
Agricultural equipment frequently combines molded plastic components with metal hardware, machined components, fasteners, cables and electromechanical assemblies.
Hi-Rel Plastics & Molding can support custom plastic and metal component requirements to help customers consolidate manufacturing operations and reduce the number of suppliers required for a program.
This capability is particularly valuable for agricultural equipment assemblies containing molded housings, metal inserts, brackets, hardware, electrical connections and mechanical components.
Manufacturing a molded component is often only one stage of the complete agricultural equipment supply chain.
Hi-Rel Plastics & Molding provides value-added assembly services including:
Providing molding and assembly through a single manufacturing partner can help OEM customers simplify purchasing, reduce transportation between suppliers and improve production coordination.
Hi-Rel Plastics & Molding offers a broad range of secondary manufacturing and finishing services for agricultural plastic components and assemblies.
Available operations include CNC machining, trimming, drilling, ultrasonic welding, heat staking, heat insertion, adhesive bonding, pad printing, hot stamping, heat transfer decoration, label application, painting, coating, surface finishing, inspection, assembly, packaging and other value-added operations.
These capabilities allow customers to source more complete agricultural components rather than coordinating individual molding, finishing and assembly suppliers.
Agricultural equipment may require materials capable of resisting sunlight, water, fertilizers, pesticides, chemicals, impact, abrasion and seasonal temperature variations.
Depending on the application and manufacturing process, Hi-Rel Plastics & Molding works with a broad range of thermoplastics and engineering-grade materials, including:
Material selection can consider UV stability, chemical resistance, moisture resistance, impact strength, stiffness, wear resistance, dimensional stability, temperature performance and the intended service environment.
Today’s agricultural industry increasingly incorporates sensors, GPS systems, electronic controls, automated irrigation, soil monitoring, precision planting and connected equipment.
These technologies create new requirements for precision molded components such as sensor housings, electronic enclosures, connector bodies, cable management components, protective covers, seals and mounting hardware.
Hi-Rel Plastics & Molding’s experience with precision injection molding, engineering resins, LSR molding, cable assembly, mechanical assembly and secondary manufacturing makes the company a strong manufacturing partner for agricultural technology and precision farming equipment companies developing next-generation systems.
Hi-Rel Plastics & Molding provides agricultural OEMs with a complete manufacturing path that can include:
Concept & Part Evaluation → 3D Printing / Rapid Prototyping → DFM → Material Selection → Mold & Tool Manufacturing → Sampling → Production Molding → Secondary Operations → Assembly → Inspection → Packaging & Delivery
Our 3D printing and rapid prototyping capabilities can help manufacturers evaluate designs before committing to production tooling, while our molding, tooling and secondary manufacturing capabilities support the transition into scalable production.
Hi-Rel Plastics & Molding Corp. maintains quality management systems supported by ISO 9001:2015, AS9100 Rev D and ISO 13485:2016 certifications.
Our quality-focused manufacturing processes support dimensional consistency, repeatability, traceability, documented production procedures and inspection requirements for demanding OEM manufacturing programs.
Learn more about Hi-Rel Plastics & Molding’s plastic injection molding capabilities and complete manufacturing capabilities.
Located in Riverside, California, Hi-Rel Plastics & Molding Corp. supports agricultural equipment manufacturers, irrigation companies, AgTech companies and farming equipment OEMs throughout:
Our California manufacturing location provides convenient support for West Coast agricultural equipment companies while our manufacturing capabilities serve OEM customers nationwide.
Multiple Manufacturing Processes
Injection molding, blow molding, LSR molding, thermoforming, vacuum forming and rotational molding provide flexibility for a wide range of agricultural components.
Tooling Through Production
Support from prototype development and mold manufacturing through production, secondary operations and assembly.
ISO-Certified Quality Systems
ISO 9001:2015, AS9100 Rev D and ISO 13485:2016 certifications support demanding quality requirements.
Plastic & Metal Manufacturing
Custom plastic and metal parts can be integrated into complete agricultural equipment manufacturing programs.
Assembly Capabilities
Mechanical assembly, cable assembly, ultrasonic welding, heat staking and other value added services can reduce the number of suppliers required.
Engineering Material Experience
A broad selection of standard and engineering-grade thermoplastics supports applications requiring chemical, impact, temperature, UV and wear resistance.
Prototype to High-Volume Production
Manufacturing capabilities can support product development, production launch and ongoing production requirements.
40+ Years of Manufacturing Experience
Decades of plastic molding and manufacturing experience provide the technical foundation to support complex OEM programs.
What agricultural equipment components can be manufactured using plastic injection molding?
Injection molding can produce irrigation fittings, valve bodies, sensor housings, electrical enclosures, planter components, clips, brackets, controls, pump components, protective covers and many other custom agricultural equipment parts.
What plastics are suitable for outdoor agricultural equipment?
The appropriate resin depends on the application. HDPE, polypropylene, nylon, glass-filled nylon, polycarbonate, acetal, PVC, TPE and other engineering resins can be evaluated based on UV exposure, chemicals, moisture, impact, temperature and mechanical requirements.
Can you manufacture components exposed to fertilizers and agricultural chemicals?
Yes. Material selection can be based on the specific chemicals and environmental conditions involved. Chemical compatibility should be evaluated for the particular resin, chemical concentration, temperature and intended service conditions.
Does Hi-Rel Plastics & Molding manufacture molds for agricultural plastic parts?
Yes. Hi-Rel Plastics & Molding supports mold and tooling requirements for injection molding, blow molding, LSR molding, thermoforming, vacuum forming and rotational molding projects.
Can you manufacture large agricultural tanks and containers?
Rotational molding and blow molding can be used for many large or hollow agricultural products including water tanks, chemical containers, reservoirs, feed containers and fluid handling products. The appropriate process depends on component size, geometry, material and production requirements.
Do you provide assembly after molding?
Yes. Hi-Rel Plastics & Molding provides mechanical assembly, cable assembly, ultrasonic welding, heat staking, adhesive bonding, hardware insertion and other secondary manufacturing services.
Do you work with agricultural equipment OEMs outside California?
Yes. Hi-Rel Plastics & Molding serves agricultural equipment manufacturers and OEM customers throughout California and across the United States.
Can you help convert an agricultural metal component to plastic?
Depending on the component and performance requirements, our team can evaluate opportunities for plastic conversion. Engineering-grade thermoplastics can potentially reduce component weight, eliminate corrosion, consolidate multiple components and reduce secondary manufacturing operations.
Whether you need an injection molded irrigation component, agricultural equipment housing, LSR seal, blow molded reservoir, thermoformed equipment cover, rotational molded tank, custom tooling, plastic or metal component, or complete assembled product, Hi-Rel Plastics & Molding Corp. can support your project from development through production.
Contact Hi-Rel Plastics & Molding Corp. to discuss your agricultural equipment manufacturing requirements, drawings, 3D CAD files, materials and estimated production quantities.
Hi-Rel Plastics manufactures durable plastic components for agricultural and farming equipment, supporting everything from part evaluation and prototyping to tooling, production, and secondary operations. Our team works with rugged materials and functional designs to meet the demands of agricultural environments.
Agricultural equipment and systems require durable, high-performance components capable of withstanding harsh outdoor environments, heavy use, and continuous exposure to moisture, chemicals, UV radiation, and extreme temperatures. Hi-Rel Plastics produces precision-molded plastic parts designed to deliver long-term reliability and consistent performance. With experience in engineering-grade resins and quality-focused manufacturing, we help agricultural equipment manufacturers and OEMs develop components that balance strength, durability, and cost efficiency while meeting production and functional requirements.
Injection Molding
Blow Molding
Liquid Silicone Rubber (LSR) Molding
Thermoforming / Vacuum Forming
Rotational Molding
Engineered to withstand harsh outdoor environments, including moisture, UV exposure, and temperature changes.
Materials selected to perform under exposure to fertilizers, pesticides, and heavy use.
Parts manufactured for reliable performance in agricultural machinery and systems.
Efficient production processes to support both custom and high-volume equipment needs.
