Hi-Rel Plastics & Molding Corp. provides precision plastic molding, mold and tooling manufacturing, engineering, prototyping, custom plastic and metal parts manufacturing, assembly and secondary manufacturing services for industrial equipment manufacturers, machinery OEMs, automation companies, fluid-handling equipment manufacturers and industrial product companies throughout California and across the United States.
With more than 40 years of plastics manufacturing experience and ISO 9001:2015, AS9100 Rev D and ISO 13485:2016 certifications, Hi-Rel Plastics & Molding supports industrial manufacturing programs from initial component development through tooling, production, secondary operations, assembly and ongoing supply.
Our manufacturing capabilities include plastic injection molding, blow molding, liquid silicone rubber molding, thermoforming and vacuum forming, rotational molding, mold and tool manufacturing, 3D printing and rapid prototyping, custom plastic and metal CNC machining, mechanical assembly, cable assembly, ultrasonic welding, pad printing and other value-added manufacturing services.
By combining multiple manufacturing processes with engineering, tooling and assemblysupport, Hi-Rel Plastics & Molding can serve as a single-source manufacturing partner for demanding industrial OEM programs.
Industrial components may operate continuously while exposed to mechanical stress, vibration, chemicals, oils, fuels, moisture, abrasion, temperature changes and repeated handling.
Material selection, part design, tooling quality and manufacturing consistency are therefore critical to long-term performance.
Hi-Rel Plastics & Molding manufactures custom components for applications including:
Whether the requirement involves a precision molded gear, rugged machine housing, fluid reservoir, industrial seal, protective cover or complete subassembly, Hi-Rel Plastics & Molding can evaluate the manufacturing process and material best suited to the application.
Engineered to perform in demanding environments with exposure to heat, chemicals, and mechanical stress.
Efficient manufacturing for both low- and high-volume industrial applications.
Experience with engineering-grade resins designed for structural integrity and long-term performance.
Precision molding processes ensure uniform parts across every production run.
Plastic injection molding provides an efficient method for producing complex industrial plastic components with repeatable dimensions, tight tolerances and scalable production volumes.
Hi-Rel Plastics & Molding supports prototype, low-, medium- and high-volume industrial injection molding programs.
Common industrial injection molded components can include:
Additional injection molding capabilities can include insert molding, overmolding, vertical injection molding, multi-material molding and tight-tolerance molding depending on component requirements.
Metal inserts, threaded components, bushings or electrical features can potentially be integrated directly into molded assemblies to reduce downstream assembly operations.
Custom blow molding is well suited for industrial applications requiring hollow plastic components, reservoirs, containers, ducts and fluid-handling products.
Hi-Rel Plastics & Molding supports extrusion blow molding (EBM), injection blow molding (IBM) and injection stretch blow molding (ISBM).
Potential industrial blow molding applications include:
Blow molded products can also incorporate trimming, deflashing, leak testing, labeling, printing, assembly and packaging depending on project requirements.
Liquid silicone rubber molding provides flexible, durable components for applications requiring sealing, vibration resistance, temperature performance or elastomeric properties.
Industrial LSR applications can include:
LSR can be especially useful in industrial systems where conventional rigid thermoplastics cannot provide the necessary flexibility or sealing performance.
Thermoforming and vacuum forming provide economical manufacturing options for larger industrial components, panels, covers and trays.
Applications may include:
Thermoforming can be particularly economical for larger part geometries or production quantities where conventional injection molding tooling may not provide the best overall manufacturing solution.
Rotational molding provides a manufacturing option for large hollow industrial products requiring durability and seamless construction.
Potential applications include:
Rotational molding can provide durable hollow structures while allowing integrated handles, mounting features and other molded-in elements.
Long-term industrial production depends heavily on reliable tooling.
Hi-Rel Plastics & Molding provides mold and tool manufacturing and tooling support for injection molding, blow molding, LSR molding, thermoforming, vacuum forming and rotational molding projects.
Our tooling capabilities can include:
Hi-Rel Plastics & Molding supports both domestic and international tooling strategies based on production requirements, budgets and project timelines.
Industrial equipment components frequently need to maintain dimensional accuracy, mechanical strength and long-term functionality under demanding operating conditions.
Early manufacturing involvement can help reduce tooling changes and production issues.
Hi-Rel Plastics & Molding supports engineering and product development through:
Our 3D printing and rapid prototyping services can also help industrial OEMs evaluate form, fit and function before committing to production tooling.
Many industrial OEMs evaluate engineering thermoplastics as alternatives to traditionally machined, fabricated or cast metal components.
Depending on the application, converting a metal component to molded plastic may offer opportunities to:
Not every metal component is suitable for conversion. Material, load, dimensional, temperature, wear, regulatory and environmental requirements should be evaluated during the engineering process.
Hi-Rel Plastics & Molding can help customers evaluate whether an engineering thermoplastic may be suitable for a particular industrial application.
Hi-Rel Plastics & Molding works with a broad range of commodity and engineering-grade thermoplastics based on application requirements.
Potential materials include:
Material selection can consider:
Material selection should always be matched to the actual service environment and engineering requirements.
Some industrial programs require machined components in addition to molded parts.
Hi-Rel Plastics & Molding offers plastic and metal CNC machining to support prototypes, production components, inserts, fixtures and related manufacturing requirements.
Combining molded plastic components and machined plastic or metal components through one supplier can simplify sourcing for industrial assemblies that contain multiple manufacturing technologies.
Industrial OEMs frequently require more than individual molded components.
Hi-Rel Plastics & Molding provides assembly services including:
Integrating molding and assembly can help industrial OEMs reduce supplier count, transportation between operations and internal assembly workload.
Hi-Rel Plastics & Molding provides ultrasonic insertion and ultrasonic welding for suitable thermoplastic components.
Ultrasonic welding can be used for industrial housings, enclosures, reservoirs, assemblies and other components requiring reliable plastic-to-plastic joining.
Additional joining methods may include heat staking, heat insertion, mechanical fastening and adhesive bonding depending on component geometry and material.
Industrial parts often require permanent identification, operating instructions, logos, scales, symbols or warning information.
Hi-Rel Plastics & Molding provides pad printing and other decorating or labeling options for suitable molded components.
These capabilities can support:
For industrial OEMs seeking to reduce the number of suppliers involved in a program, Hi-Rel Plastics & Molding can combine multiple processes into a more complete contract manufacturing solution.
A typical project can include:
Engineering Review → DFM → Prototype → Material Selection → Mold Manufacturing → Production Molding → CNC Machining → Secondary Operations → Assembly → Inspection → Packaging
This integrated manufacturing approach can reduce handoffs between suppliers and improve coordination throughout product development and ongoing production.
Although most industrial products do not require cleanroom production, certain high-purity industrial, electronics, laboratory, fluid-handling or specialty applications may require additional contamination control.
Hi-Rel Plastics & Molding offers Class 10,000 / ISO Class 7 cleanroom environments and Class 100,000 / ISO Class 8 cleanroom environments for qualifying manufacturing and assembly programs.
Our controlled manufacturing capabilities can support projects requiring cleanroom molding or clean room assembly where contamination-control requirements apply.
Industrial OEM programs depend on repeatability, dimensional consistency, process control and dependable supply.
Hi-Rel Plastics & Molding Corp. maintains ISO 9001:2015, AS9100 Rev D and ISO 13485:2016 certifications.
Our quality management systems support disciplined manufacturing, inspection, process documentation and continuous improvement.
Certification experience across industrial, aerospace and medical manufacturing environments also provides Hi-Rel Plastics & Molding with a quality foundation appropriate for demanding industrial applications.
Hi-Rel Plastics & Molding Corp. is headquartered in Riverside, California and supports industrial equipment manufacturers throughout:
Companies searching for an industrial plastic parts manufacturer in California, industrial injection molding company, OEM plastics manufacturer or industrial contract manufacturer in the USA can work with Hi-Rel Plastics & Molding for development, tooling, production and assembly.
40+ Years of Plastics Manufacturing Experience
Decades of manufacturing experience support challenging industrial components and long-term OEM production.
Multiple Plastic Manufacturing Processes
Injection molding, blow molding, LSR molding, thermoforming, vacuum forming and rotational molding provide flexibility across a wide range of component sizes and geometries.
Engineering & Prototyping Support
DFM, Mold Flow Analysis, material selection and rapid prototyping can help reduce risk before production tooling is finalized.
Mold & Tool Manufacturing
Tooling support from prototype through long-term production helps simplify program management.
Engineering-Grade Materials
Experience with commodity plastics and high-performance engineering resins allows material selection to be matched to application requirements.
Custom Plastic & Metal Components
Molding and CNC machining capabilities support assemblies requiring both plastic and metal components.
Secondary Operations & Assembly
Mechanical assembly, cable assembly, ultrasonic welding, pad printing, heat insertion, adhesive bonding and other operations help customers source more complete products.
ISO-Certified Quality
ISO 9001:2015, AS9100 Rev D and ISO 13485:2016 certifications demonstrate established quality-management systems.
Cleanroom Manufacturing Available
ISO Class 7 and ISO Class 8 environments are available for specialized industrial projects requiring controlled manufacturing.
California Manufacturing Support for Nationwide OEMs
Hi-Rel Plastics & Molding serves industrial companies throughout California and across the United States.
What industrial components can be injection molded?
Injection molding can manufacture machine housings, gears, rollers, brackets, fluid fittings, pump and valve components, electrical enclosures, control components, conveyor parts, knobs, handles, guards and many other custom industrial components.
What plastics are commonly used for industrial equipment?
Common materials may include polypropylene, polyethylene, ABS, nylon, glass-filled nylon, polycarbonate, acetal, PBT, PPS, PEEK and other engineering-grade thermoplastics. The correct material depends on load, temperature, chemical exposure, wear, dimensional and environmental requirements.
Can Hi-Rel Plastics & Molding manufacture molds for industrial plastic parts?
Yes. Hi-Rel Plastics & Molding supports mold and tool manufacturing for injection molding, blow molding, LSR molding, thermoforming, vacuum forming and rotational molding programs.
Can you manufacture both plastic and metal parts?
Yes. Hi-Rel Plastics & Molding supports custom plastic molding along with plastic and metal CNC machining for projects that require multiple component types.
Can Hi-Rel Plastics & Molding assemble industrial products?
Yes. Available services include mechanical assembly, cable assembly, hardware installation, ultrasonic welding, heat staking, adhesive bonding and other secondary manufacturing operations.
Do you offer prototype industrial parts?
Yes. Hi-Rel Plastics & Molding offers 3D printing and rapid prototyping for concept evaluation, form-and-fit testing, engineering validation and pre-production development.
Can you help convert a metal industrial component to plastic?
Potentially. Material performance, loading, temperature, chemical exposure, tolerances and other requirements must first be evaluated to determine whether an engineering plastic is appropriate.
Does Hi-Rel Plastics & Molding serve industrial customers outside California?
Yes. Hi-Rel Plastics & Molding is headquartered in Riverside, California and serves industrial equipment manufacturers and OEM customers throughout California and across the United States.
Whether your project requires an injection molded machine component, blow molded reservoir, LSR seal, thermoformed equipment cover, rotational molded tank, custom mold, CNC-machined component or complete industrial assembly, Hi-Rel Plastics & Molding Corp. can support your program from engineering through production.
Contact Hi-Rel Plastics & Molding Corp. to discuss your drawings, 3D CAD files, material requirements, tooling needs and estimated production quantities.
Industrial equipment components require strength, precision, and long-term reliability to perform in demanding operating environments. Hi-Rel Plastics produce precision-molded parts designed to withstand mechanical stress, temperature variation, chemical exposure, and continuous use across a wide range of industrial equipment applications.
With experience in advanced engineering resins and quality-driven manufacturing, we help industrial equipment manufacturers and OEMs produce reliable molded components that meet both functional and production requirements.
Injection Molding
Blow Molding
Liquid Silicone Rubber (LSR) Molding
Thermoforming / Vacuum Forming
Rotational Molding
Engineered to perform in demanding environments with exposure to heat, chemicals, and mechanical stress.
Efficient manufacturing for both low- and high-volume industrial applications.
Experience with engineering-grade resins designed for structural integrity and long-term performance.
Precision molding processes ensure uniform parts across every production run.
