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High-Precision Injection Molded Magnets for Automotive Sensors and Thermal Management Systems

As vehicles become increasingly electrified and intelligent, the demand for accurate position sensing and reliable motion control continues to grow. From electronic expansion valves and electric water pumps to angle sensors and position encoders, injection molded magnets play a critical role in ensuring stable and precise system performance.


At Maglastic (Chase Technology), we specialize in high-performance magnetic compounds and precision injection molded magnets designed for demanding automotive applications. Our products are developed and manufactured in accordance with IATF 16949 requirements to support the quality expectations of global automotive customers.


Supporting Automotive Thermal Management Systems

Efficient thermal management is essential for modern EVs and hybrid vehicles. Components such as electric coolant pumps and electronic expansion valves rely on compact magnetic rotors to provide accurate and reliable control.

Compared with conventional assembled magnets, injection molded magnetic rotors offer several advantages:

  • Integrated Structure: The magnet is molded directly onto the shaft or insert, eliminating secondary bonding processes and improving assembly reliability.

  • Excellent Concentricity Control : Precision tooling helps maintain tight dimensional tolerances, contributing to smooth operation and stable sensor feedback.

  • Design Flexibility: Complex geometries, thin-wall structures, and integrated features can be achieved through injection molding, helping reduce component count and assembly costs.

The integrated molding structure provides excellent mechanical retention, making it suitable for high-speed automotive pump and actuator applications.

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PPS-Based Materials for Demanding Automotive Environments

Automotive components are frequently exposed to elevated temperatures, automotive fluids, vibration, and thermal cycling.To meet these challenges, Maglastic offers PPS-based magnetic compounds featuring:

Hig Temperature Resistance

PPS-based material systems are suitable for demanding automotive environments, with material options available for applications up to 180°C depending on magnetic grade and operating conditions.

Excellent Chemical Resistance

PPS exhibits strong resistance to automotive oils, coolants, transmission fluids, and many common automotive chemicals, helping ensure long-term durability in service.

Custom Magnetic Solutions for Automotive Applications

Every automotive application has unique performance requirements.

Maglastic provides complete support from material selection to finished component production, including:

  • Custom magnetic compound development

  • NdFeB, Ferrite, and SmFeN material options

  • Insert molding and overmolding solutions

  • Radial, axial, and multipole magnetization

  • Prototype and mass production support

Our engineering team works closely with customers to optimize magnetic performance, manufacturability, and cost efficiency.

Quality Assurance

To ensure consistent product quality, magnetic components undergo comprehensive verification processes, including:

  • Magnetic field distribution testing

  • Flux and magnetic property measurement

  • Dimensional inspection

  • Thermal shock and environmental testing

  • Material qualification and incoming raw material verification

These measures help ensure that every component meets customer specifications and automotive quality requirements.

Partnering for Next-Generation Mobility

As automotive systems become smarter, more efficient, and increasingly electrified, reliable magnetic components are more important than ever.

Maglastic (Chase Technology) is committed to delivering high-performance magnetic compounds and precision injection molded magnetic solutions that support automotive sensors, thermal management systems, and other critical applications worldwide.

Why Maglastic

  • More than 20 R&D engineers dedicated to magnetic material development

  • In-house mold design and manufacturing capability

  • Complete testing laboratory covering raw materials, compounds and finished parts

  • Extensive experience in automotive, home appliance and industrial applications

  • Trusted by leading OEM and Tier 1 suppliers worldwide