Hi-Rel Plastics & Molding Corp. provides custom coil winding and coil assembly services for OEMs and manufacturers throughout California and across the United States. Our coil winding capabilities can be integrated with custom plastic component manufacturing, machining, tooling, mechanical assembly, cable assembly, and other secondary operations to provide customers with a more complete contract manufacturing solution.
As an ISO 9001, AS9100 and ISO 13485 certified manufacturer, Hi-Rel Plastics & Molding supports demanding programs for medical, aerospace and defense, electronics, electrical equipment, automotive and electric vehicles, industrial equipment, laboratory products, consumer products, and other applications requiring dependable manufacturing and assembly.
Whether your program requires custom wound coils as individual components or coil winding integrated into a larger plastic, metal, electrical, or electromechanical assembly, our team can review your drawings, specifications, materials, volumes, and performance requirements.
Coil winding is the controlled process of winding conductive wire around a bobbin, core, form, or other geometry to produce an electromagnetic component for use in electrical and electromechanical products.
The performance of a wound coil depends on numerous factors, including:
Hi-Rel Plastics & Molding works from customer drawings and specifications to manufacture coil winding components and assemblies for prototype and production applications.
Our integrated manufacturing capabilities allow customers to combine coil winding with plastic injection molding, custom plastic and metal component manufacturing, machining, tooling, and assembly rather than coordinating each process through separate suppliers.
Accurate winding processes ensure consistent coil performance and reliability.
Repeatable processes deliver uniform coils across production runs.
Careful management of wire and materials to maintain integrity and performance.
Seamless support for assemblies that combine molded and wound components.
OEM coil applications can vary considerably in size, shape, electrical requirements, production volume, and end-use environment.
Hi-Rel Plastics & Molding supports custom coil manufacturing and contract coil winding based on customer-specific requirements rather than limiting customers to standard off the-shelf components.
Depending on project specifications and confirmed production capabilities, coil winding programs may involve applications such as:
Our team can evaluate the coil design along with the surrounding molded, machined, electrical, and mechanical components to determine how the complete product can be manufactured and assembled efficiently.
Many wound-coil products require a bobbin, spool, coil form, housing, support, insulator, connector, enclosure, or other molded plastic component.
This is an important advantage of working with Hi-Rel Plastics & Molding.
Through our custom plastic injection molding services, we can manufacture precision molded components used within electrical and electromechanical assemblies and integrate those components with coil winding and downstream assembly operations.
Potential molded components can include:
Combining molded component manufacturing and coil winding with one contract manufacturer can help simplify sourcing and reduce movement of components between multiple vendors.
Hi-Rel Plastics & Molding can integrate coil winding into larger electromechanical and mechanical assemblies when required by the customer’s product design.
Assemblies may combine:
Our assembly services can help customers move from individual components to finished subassemblies or higher-level product assemblies within a coordinated manufacturing program.
Coil-based products frequently interface with wires, leads, connectors, terminals, cables, or other electrical components.
Hi-Rel Plastics & Molding’s mechanical and cable assembly capabilities allow qualifying projects to incorporate coil winding into larger electrical and electromechanical assemblies.
Integrating coil production, molded components, cable-related components, and mechanical assembly can simplify the supply chain for products that would otherwise require coordination among multiple specialty suppliers.
A major SEO and manufacturing differentiator for Hi-Rel Plastics & Molding is the ability to combine coil winding with injection molded plastic components.
Our plastic injection molding services support prototype, low-volume, medium-volume, and high-volume production for a wide variety of industries and applications.
Injection molded parts used in coil-related assemblies can potentially include bobbins, housings, insulating components, connectors, supports, covers, mounting structures, and custom component interfaces.
After molding, components can move through applicable secondary operations such as:
This integrated approach helps OEMs reduce supplier complexity and provides one manufacturing partner with visibility over multiple production stages.
Electromechanical assemblies frequently contain more than wound wire and plastic components.
Hi-Rel Plastics & Molding can support projects requiring custom plastic and metal components through molding and plastic and metal CNC machining.
Machined components can potentially be integrated with molded parts, coil assemblies, brackets, hardware, connectors, and other customer-specified elements.
This capability makes Hi-Rel Plastics & Molding particularly useful for OEMs seeking a contract manufacturer capable of supporting complex assemblies containing plastic, metal, electrical, and electromechanical components.
Successful coil-based products require proper coordination between the electrical component and surrounding mechanical design.
Hi-Rel Plastics & Molding provides engineering and product development support that can help customers evaluate manufacturing considerations involving:
Customers developing new products can also combine engineering support with 3D printing and rapid prototyping to evaluate housings, mounts, bobbins, interfaces, fixtures, and mechanical components before committing to production tooling.
Hi-Rel Plastics & Molding can support programs from early development through production.
A typical manufacturing program may involve:
This prototype-to-production approach helps maintain continuity as products move from initial development into ongoing manufacturing.
Medical devices and diagnostic products can contain electromagnetic, electrical, sensor, actuator, or electromechanical components requiring precision manufacturing and assembly.
Hi-Rel Plastics & Molding is ISO 13485 certified and supports medical-device manufacturers with custom manufacturing services including coil winding, plastic molding, machining, clean room manufacturing, assembly, and secondary operations.
Our capabilities include both Class 10,000 / ISO Class 7 cleanroom environments and Class 100,000 / ISO Class 8 cleanroom environments for qualifying manufacturing and assembly programs.
Customers requiring molded medical components can combine coil-related assemblies with our medical device injection molding services.
Potential medical applications may include components for:
Actual product requirements determine whether cleanroom production or assembly is necessary.
Hi-Rel Plastics & Molding is AS9100 certified and supports aerospace and defense manufacturing programs requiring controlled quality systems and dependable component manufacturing.
Coil-based and electromechanical assemblies may be used in applications involving controls, sensors, instrumentation, communication systems, equipment housings, electrical components, and other aerospace systems.
Our aerospace manufacturing capabilities can integrate custom coil winding with plastic molding, precision machining, hardware installation, cable assembly, mechanical assembly, and other approved secondary operations.
Customers can learn more about our aerospace and defense manufacturing capabilities.
Custom wound coils are used throughout electrical and electronic systems where electromagnetic or inductive functionality is required.
Hi-Rel Plastics & Molding can support customers in electronics and electrical industries requiring custom coil components combined with molded housings, insulation components, connectors, supports, enclosures, or assemblies.
Potential applications can include:
Combining plastic component manufacturing, coil winding, machining, cable assembly, and final assembly helps provide a more complete contract manufacturing solution.
Modern vehicles contain increasingly complex electrical and electromechanical systems.
Custom wound-coil and related assemblies can potentially be used in sensors, actuators, control systems, pumps, solenoids, charging equipment, electrical modules, and other automotive or EV products.
Hi-Rel Plastics & Molding supports automotive manufacturers with injection molding, blow molding, liquid silicone rubber molding, machining, tooling, assembly, and secondary manufacturing services.
Our ability to manufacture plastic housings, connectors, brackets, insulating components, and other parts can complement qualifying coil winding and electromechanical assembly programs.
Industrial equipment frequently incorporates coils and electromagnetic components within controls, sensors, valves, actuators, automation systems, instrumentation, and machinery.
Hi-Rel Plastics & Molding can support industrial OEMs requiring custom wound components as part of broader plastic, metal, electrical, and mechanical assemblies.
Our capabilities allow customers to consolidate several processes with one manufacturing partner rather than managing separate vendors for molding, machining, coil winding, and final assembly.
Some electrical and coil assemblies require bonded components or mechanical stabilization.
Our adhesive bonding services can be incorporated into qualifying assemblies involving compatible plastic, metal, and other substrates.
Adhesive selection and bonding processes depend on the substrate materials, geometry, operating conditions, electrical requirements, temperature exposure, and customer specifications.
Plastic housings surrounding coil or electromechanical assemblies may require joining after internal components are installed.
For compatible thermoplastic materials, ultrasonic welding can provide a permanent joining method without conventional fasteners.
Integrating molding, internal component installation, coil assembly, and ultrasonic welding can reduce the number of suppliers required to produce a completed plastic electromechanical assembly.
Coil and electrical assemblies may also require threaded inserts, retained components, or mechanical attachment points.
Our heat insertion and heat staking services can be incorporated into molded plastic assemblies where appropriate.
These processes can help install metal inserts or retain components within thermoplastic housings and support structures.
Electrical and electromechanical assemblies sometimes require part numbers, logos, operating information, symbols, identification marks, or other graphics.
Hi-Rel Plastics & Molding provides pad printing services that can be integrated with molded products and final assemblies.
Providing molding, printing, component installation, and assembly through one supplier can further simplify production logistics.
Hi-Rel Plastics & Molding operates under quality-management systems supporting demanding OEM programs.
Our certifications include:
These certifications support our broader manufacturing operations serving industrial, aerospace, medical, electronics, automotive, and other quality-sensitive markets.
Quality requirements for individual coil programs may include dimensional inspection, assembly verification, electrical criteria, visual inspection, traceability, documentation, and customer-specific inspection requirements depending on the project.
Coil winding can be combined with a broad range of secondary manufacturing processes available from Hi-Rel Plastics & Molding, including:
Our broad manufacturing capabilities allow customers to obtain more than an individual wound coil—we can support complete components, subassemblies, and integrated contract manufacturing programs.
Customers searching for a custom coil winding supplier often need additional manufacturing operations to complete the final product.
Hi-Rel Plastics & Molding combines coil winding with:
This range of capabilities allows Hi-Rel Plastics & Molding to support OEM customers from design and prototype through tooling, component manufacturing, coil winding, assembly, finishing, and production.
Hi-Rel Plastics & Molding is located in Riverside, California and serves customers throughout Riverside, San Bernardino, the Inland Empire, Los Angeles, Orange County, San Diego, Ventura, Southern California, Northern California, and across the United States.
Whether your program requires custom coil winding, precision coil winding, bobbin and coil assembly, coil winding with injection molded components, electromechanical assembly, cable assembly, or complete contract manufacturing, our team can review your specifications and determine how our capabilities can support your production requirements.
Looking for a California manufacturing partner capable of combining coil winding with plastic molding, machining, tooling, and final assembly?
Contact Hi-Rel Plastics & Molding with your project information, including available drawings, coil specifications, wire requirements, bobbin or core requirements, electrical
requirements, estimated quantities, annual usage, assembly requirements, and application details.
Our team can review your project and determine the appropriate manufacturing approach for your custom coil or electromechanical assembly.
Hi-Rel Plastics provides custom coil winding services for precision wire-formed and wound components used across a variety of industrial and specialized applications. Our capabilities support custom configurations, tight tolerances, and both standard and non-standard coil designs.
Coil winding is the process of forming wire into controlled coils or wound configurations with specific diameters, pitches, turn counts, and shapes based on application requirements. Hi-Rel Plastics works with a range of wire gauges and materials, including copper, aluminum, stainless steel, brass, and specialty materials to produce high-quality custom coils.
Our experience supports projects ranging from simple wound components to complex precision coils requiring tight radii, intricate geometries, and consistent repeatability. With in-house manufacturing support and custom fixturing capabilities, we help deliver dependable coil winding solutions tailored to customer specifications.
Hi-Rel Plastics offers precision coil winding services to support the production of electrical and electronic components. From prototyping to full-scale production, our team delivers consistent, high-quality winding solutions for a variety of applications.
Coil winding requires accuracy, consistency, and reliable material handling to ensure proper electrical performance. Hi-Rel Plastics utilizes controlled processes to produce coils that meet exact specifications for performance, durability, and efficiency.
With experience in integrated component manufacturing, we help deliver dependable coil solutions for a wide range of electrical applications.
Accurate winding processes ensure consistent coil performance and reliability.
Repeatable processes deliver uniform coils across production runs.
Careful management of wire and materials to maintain integrity and performance.
Seamless support for assemblies that combine molded and wound components.
