Leak-Proof Assembled Cold Plates for High-Density Thermal Systems

Engineered for extreme heat loads, KingKa specializes in custom assembled liquid cold plates utilizing advanced Friction Stir Welding (FSW) and precision CNC micro-channeling. With over 16 years of thermal manufacturing experience, we deliver monolithic, zero-porosity cooling solutions for next-generation Data Centers, AI Servers, and Telecommunications.

Consult a Thermal Engineer

Why Choose Assembled Liquid Cold Plates?

As electronic components like GPUs and AI processors push the boundaries of power density, conventional tube cold plates may no longer suffice. Assembled liquid cold plates offer the ultimate thermal performance. By machining complex, high-density micro-channels directly into the base material before sealing, this architecture drastically increases the internal surface area for coolant contact.

To ensure absolute structural integrity, KingKa utilizes Solid-State Friction Stir Welding (FSW) to join the cover plate to the base. Unlike traditional brazing, FSW melts the materials together without adding chemical flux or filler metals, creating a monolithic, hermetically sealed bond. This results in a cold plate with ultra-low thermal resistance, exceptional burst pressure strength, and zero risk of long-term galvanic corrosion, making it the premier choice for mission-critical liquid cooling systems.

Get A Quote

Our End-to-End Manufacturing Process

KingKa controls the entire assembled cold plate manufacturing lifecycle in-house, ensuring unparalleled precision and hermetic sealing

CFD Optimization & Engineering

Before production, our Dongguan Nancheng R&D center uses advanced CFD simulation to optimize the internal micro-channel layout, ensuring balanced fluid distribution and minimal pressure drop.

Precision Micro-Channel CNC Milling

Utilizing our fleet of 50+ high-speed CNC centers, we mill intricate internal fins and fluid routing paths with extreme tolerances down to $\pm$0.005 mm.

Friction Stir Welding (FSW)

We employ specialized China Aerospace FSW machines to forge a seamless, solid-state bond between the base and cover plate. This process creates a 100% leak-proof, high-strength seal without introducing impurities.

Post-Weld Surface Machining

The welded assembly undergoes high-precision fly-cutting to remove weld flash, achieving a perfectly flat and smooth external surface engineered for minimal thermal interface resistance.

Extreme Fluid Validation

The sealed cold plate is rigorously tested in our in-house lab using dedicated airtightness leakage detectors and two-stage flow resistance machines to guarantee performance under high fluid pressure.

Dimensional & Surface Inspection

Final checks are performed using HEXAGON CMM gages ($\pm$0.001 mm) and Kett roughness testers to ensure perfect compliance with your CAD designs prior to global dispatch.

Get A Quote

Explore Our Assembled Liquid Cold Plate

We manufacture a diverse range of assembled cold plates designed to balance thermal performance with your specific layout and budget. Review our structural options, from epoxy-filled tube designs to heat-pipe integrated hybrid plates, below.

Tube Liquid Cold Plate Technical Specifications

As a certified precision thermal manufacturer, KingKa provides highly customizable specifications to meet the exact thermal, mechanical, and spatial requirements of your projects. Below are the core technical parameters and manufacturing capabilities for our tube liquid cold plates.

Material & Structural Specifications

Specification Category	Technical Details & Parameters
Joining Technology	Solid-State Friction Stir Welding (FSW)
Joining Technology	Flux-free, monolithic hermetic sealing
Internal Architecture	CNC-milled high-density micro-channels
Internal Architecture	CFD-optimized internal fluid routing paths
Compatible Materials	Aluminum Alloys: AL6061, AL6063, AL7075, AL5052, AL1100, A356
Machining Capabilities	50+ High-speed CNC centers (Brother, Taikan)
Machining Capabilities	3-Axis, 4-Axis, and 5-Axis configurations
Machining Tolerances	Internal Channel CNC Milling: Down to $\pm$0.005 mm
Machining Tolerances	External CNC Turning: Down to $\pm$0.005 mm
Surface Flatness & Finish	Post-FSW high-precision fly-cutting
Surface Flatness & Finish	Anodizing, Passivation, Precision Sandblasting

Testing, Quality & Surface Finish

Specification Category	Technical Details & Parameters
Dimensional Inspection	Hexagon CMM Gages ($\pm$0.001 mm precision)
Dimensional Inspection	Hexagon 2.5D Optical Projectors ($\pm$0.001 mm)
Leak & Pressure Testing	4 Dedicated LCP Leakage Testers
Leak & Pressure Testing	100% In-house airtightness leak detection
Fluid & Flow Validation	Two-stage dynamic flow resistance measurement
Fluid & Flow Validation	In-house thermal testing laboratory
Quality Certifications	ISO 9001:2015 Certified
Quality Certifications	IATF 16949:2016 Automotive Quality Certified
Manufacturing Capacity	Annual thermal part capacity exceeding 60,000 units

Assembled Liquid Cold Plate Applications

Kingka’s assembled liquid cold plates provide cost-effective and scalable cooling solutions across demanding sectors requiring stable performance under extreme workloads

Data Centers & HPC

High-density server cooling and AI accelerator thermal management

EV & New Energy

Managing heat in large power modules, motor controllers, and battery systems.

Telecom Systems

Ensuring temperature stability in outdoor network modules and RF systems.

Industrial Automation

Cooling modules for high-power motor drives and factory control systems.

Medical & Laser Equipment

Consistent, precise temperature regulation for sensitive clinical and optical applications.

Power Conversion

Heat dissipation for UPS systems and commercial power supplies requiring large cooling areas.

Why Partner with KingkaTech?

Choosing the right thermal partner is a critical decision. We invite you to experience the KingkaTech difference, driven by our unique value propositions that ensure your project’s success.

Mastery in Friction Stir Welding

Assembled cold plates require flawless joining. We utilize specialized China Aerospace FSW machines to deliver solid-state, zero-porosity welds. This ensures your cold plates can handle massive burst pressures and highly corrosive coolants without the risk of leaks associated with traditional brazing.

Ultra-Precision Micro-Channeling

The heart of an assembled cold plate is its internal geometry. Leveraging over 50 advanced 3, 4, and 5-axis CNC centers, we easily machine complex, high-aspect-ratio internal fins and micro-channels. Our ability to hold $\pm$0.005 mm tolerances ensures exact fluid dynamics and maximum surface area for heat absorption.

Thermal R&D & CFD Simulation

We solve thermal bottlenecks before cutting metal. Our Dongguan Nancheng R&D center employs advanced 3D Pro/E design and CFD thermal simulation. We partner with your engineering team to model coolant flow, identify dead zones, and optimize the internal channel routing for your specific heat load.

100% In-House Reliability Testing

A leak in a data center or medical device is catastrophic. KingKa eliminates this risk through rigorous in-house testing. Every assembled cold plate is validated using our dedicated LCP airtightness leakage detectors and two-stage flow resistance machines, guaranteeing flawless performance under extreme fluid pressure

Automotive-Grade Quality Systems

Quality is structurally embedded in our operations. KingKa manufactures under the strict guidelines of ISO 9001:2015 and the automotive-grade IATF 16949:2016 standard, with ISO 13485 (Medical) currently underway. Our 4-stage IQC to OQC protocol ensures absolute consistency from prototype to mass production.

Validated by Fortune 500 Innovators

Our assembled liquid cooling solutions cool the technologies of tomorrow. With an annual capacity of 60,000+ units, we are the trusted thermal manufacturing partner for global tech titans in AI, Supercomputing, and Telecommunications, proudly supplying industry leaders like Google, ByteDance, Huawei, and Ericsson.

Quality Assurance and Certification

At Kingka Tech, our unwavering commitment to quality and precision is fundamental to our success. We adhere to the highest international machining standards to ensure that every CNC-machined component we deliver not only meets but exceeds your most stringent requirements.

Your Seamless Precision Process

Our optimized, three-tier production protocol guarantees clarity, accelerated project timelines, and strict adherence to your exacting technical specifications.

Design & Quote

Submit Your Requirements. "Simply share your 2D/3D CAD files, material preferences, quantity, and any specific surface finish or tolerance needs.

Precision Manufacturing

Once you approve the design and quote, we take it from there.

Fast Delivery & Support

Your perfect parts are ready for use.Upon successful final inspection, components are professionally packaged and dispatched using reliable logistics partners for on-time delivery.

Copper、SUS Tube Liquid Cold Plate FAQ

Q Can you scale up from a single prototype to mass production?

A Yes. With over 16 years of thermal manufacturing experience, we easily bridge the gap between rapid R&D prototyping and large-scale manufacturing. Our facility supports an annual production capacity exceeding 60,000 precision parts.
Q Are your assembled cold plates 100% tested for leaks?

A Absolutely. Every assembled liquid cold plate is subjected to severe quality validation in our in-house lab, utilizing dedicated LCP airtightness leakage detectors and flow resistance machines to ensure hermetic sealing before delivery.
Q How do you verify the flatness of the cold plate after FSW assembly?

A The FSW process leaves a weld seam, which we eliminate through high-precision CNC fly-cutting and surface grinding. We then rigorously verify the final surface flatness and roughness using Kett testers and HEXAGON Coordinate Measuring Machines ($\pm$0.001 mm accuracy) to ensure minimal thermal interface resistance.
Q Can KingKa machine complex internal micro-channels for custom designs?

A Yes. Utilizing our fleet of over 50 high-speed 3, 4, and 5-axis CNC machining centers (including Japanese Brother machines), we can mill highly complex, custom internal fluid routing paths and pin-fins with exceptional tolerances down to $\pm$0.005 mm.
Q Why use Friction Stir Welding (FSW) instead of vacuum brazing for assembled cold plates?

A FSW is a solid-state joining process that creates a monolithic bond without melting the base metal or adding flux. This results in a much stronger, leak-proof joint with zero porosity and no risk of internal chemical contamination, making it highly reliable for advanced liquid cooling systems.

Looking for a reliable and high quality thermal solution for your business needs?

Look no further than Kingka Tech! Our team of experts has years of experience in designing,manufacturing, and delivering top-of-the-line thermal solutions for a wide range of industries.