OKA Group Product Machining Case: Custom Heat Sink Manufacturing

As a leading precision manufacturer certified by ISO 9001, ISO 13485, ISO 14001 and IATF 16848, OKA Group delivers high-quality heat sink solutions for top domestic and international brands using mature processes including CNC milling, gear scraping and die casting. This case study introduces our successful cooperation with the global brand Panasonic, as well as renowned Chinese brands Midea, Gree, Leadshine and Leizhi. It demonstrates how our expertise in thermal management and precision machining improves product performance and supply chain reliability.

Overview of Heat Sink Machining Projects

Our heat sink manufacturing focuses on customized thermal management solutions for high-power electronic and industrial components. For clients such as Panasonic, Midea, Gree, Leadshine and Leizhi, we produce precision heat sinks tailored to specific thermal conductivity, dimensional tolerance and application requirements. The core processes applied are as follows:

• CNC Milling: Precision machining for complex structures and high-precision features
• Gear Scraping: Efficient fin forming to maximize heat dissipation area
• Die Casting: Mass production of aluminum alloy heat sink bases
• Surface Treatment: Anodizing, passivation, electroplating to enhance corrosion resistance and appearance

Client Cooperation & Project Requirements

1. International Client: Panasonic

• Application: Heat sinks for automotive and industrial electronics
• Key Requirements: High thermal conductivity, strict dimensional accuracy, compliance with IATF 16848 automotive standards, scalable mass production
• Solution: Aluminum alloy heat sinks produced by CNC milling and die casting with optimized fin design, ensuring stable thermal performance and automotive-grade quality compliance

2. Domestic Clients: Midea & Gree

• Application: Heat sinks for home appliances and HVAC systems
• Key Requirements: Cost-effective production, large-scale capacity, corrosion-resistant surface treatment
• Solution: Efficient fin forming through scraping and extrusion, combined with automatic quality inspection to ensure batch consistency for high-volume orders

3. Industrial Clients: Leadshine & Leizhi

• Application: Heat sinks for stepper motors and industrial automation equipment
• Key Requirements: Precision machining for compact structures, tight tolerance control, rapid prototyping
• Solution: Multi-axis CNC milling combined with high-precision inspection equipment to deliver compact, high-performance heat sinks for precision industrial equipment

Core Machining Processes for Heat Sink Production

1. CNC Milling

We own 288 CNC machining centers capable of processing complex heat sink structures, including customized mounting holes, threaded features and special-shaped surfaces. The process achieves tight tolerances of ±0.01 mm and consistent quality across all batches.

2. Gear Scraping (Fin Forming)

Gear scraping efficiently produces uniform, high-density fins to maximize heat dissipation area, ideal for high-power applications in automotive and industrial electronics.

3. Die Casting

For mass production of aluminum alloy heat sink bases, die casting offers cost efficiency and high capacity. Our 14 die-casting machines produce lightweight, structurally stable components meeting customers’ thermal and mechanical requirements.

4. Quality Control & Testing

Every heat sink undergoes strict inspection:

• Full dimensional testing via CMM and precision measuring tools
• Thermal performance testing to verify heat dissipation efficiency
• Material certification and ISO/IATF compliance checks
• Surface finish and corrosion resistance testing

Project Outcomes & Customer Benefits

Partnering with OKA Group for heat sink manufacturing brings customers:

• Stable quality with zero defects and consistent batches
• Flexible production capacity adapting to diverse manufacturing modes
• Cost reduction through optimized processes without compromising performance
• Full compliance with international standards for automotive, medical and industrial industries
• Reliable supply chain with on-time delivery and global logistics support

Custom Heat Sink Manufacturing Process of OKA Group

1. Requirement confirmation: Confirm thermal performance, dimensions and application scenarios with clients
2. Engineering evaluation: Thermal simulation and feasibility analysis to optimize manufacturability
3. Prototype development: Sample production via CNC milling and scraping for performance verification
4. Sample testing: Verify thermal conductivity, dimensional accuracy and surface finish
5. Mass production: Expanded production using die casting and automatic machining lines
6. Inspection & delivery: Final batch inspection, global shipment and complete quality documents

FAQ

Q1: Which brands has OKA Group supplied heat sink machining services to?

We have provided customized heat sink solutions for the global brand Panasonic and leading domestic brands including Midea, Gree, Leadshine and Leizhi.

Q2: What core processes does OKA Group use for heat sink production?

Our heat sink manufacturing adopts mature technologies: CNC milling, fin scraping, die casting and advanced surface treatment.

Q3: What quality certifications does OKA Group hold for heat sink projects?

We are certified with ISO 9001, ISO 13485, ISO 14001 and IATF 16848, meeting strict quality standards for automotive, medical and industrial sectors.

Q4: Can OKA Group support small-batch sample customization and large-scale mass production?

Yes. Our flexible production capacity meets various batch requirements and supports drawing-based customization.

Q5: What materials are available for custom heat sinks?

We offer high thermal conductivity materials such as aluminum alloy (6061, 6063), copper and magnesium alloy, selected according to your thermal and cost needs.