Thermal conductive gel application case: How does the dispensing equipment apply adhesive to the heat sink?

In automated production, the key to applying thermal grease to heat sinks using dispensing equipment lies in the precise control of the amount of grease, the application path and the equipment parameters. This typically involves three main stages: preparation, dispensing and pressing.

 

Ι.Automated Dispensing Process?

1. Preparation and Fixing

 Before dispensing, the heat sink base must be fixed to the dispensing machine’s work platform using a dedicated clamp (such as an adjustable baffle) for precise positioning to prevent displacement during dispensing. Simultaneously, the thermally conductive material needs to be connected to the dispensing system.

 

Automatic In-line PCB Glue Dispensing Machine SEC-DH400L

 

Second Intelligent In-line Automated Glue Dispensing Machine  SEC-DH400L adopts an integrated mineral casting design, with ultra-high precision and super stability, powerful expansion capabilities, and can realize ion cleaning, dispensing, detection, UV exposure and other functions;

Adopting a gantry structure, it can bear large loads, stable structure, and a powerful CCD visual positioning system, which can meet the requirements of Mark point positioning, edge positioning, and 3D scanning positioning; strong scalability, and can expand AOI detection 3D detection, UV exposure curing and other functions;

Strong platform compatibility, contact and non-contact dispensing, single-head and multi-head synchronous dispensing, automatic compensation and adjustment of double-head spacing, five-axis dispensing function based on needle A/R displacement, etc.

 

Ⅱ.Key Considerations and Equipment Selection

● Compatibility with high-viscosity adhesives dispensing machine is crucial: Thermally conductive gels (especially those with high thermal conductivity above 6 W/m·K) have very high viscosity, easily leading to stringing with ordinary dispensing valves. Industrial production often uses screw pump dispensing machines or piston dispensing valves, which provide stable extrusion pressure, ensuring accurate adhesive dosage and clean, crisp dispensing.

● Strong tolerance adaptability: Thermally conductive gels are very soft and have low compressibility, perfectly adapting to gaps from 0.5mm to 4mm, making them particularly suitable for assembly scenarios with large tolerances or uneven surfaces.

 

Second Intelligent has played an important role in theresearch, development, manufacturing, pre-sales and after-sales services of fluid dispensing robot , potting and coating solutions which range from various types of automatic fluid dispensing, potting, two-component potting machines and coating machines with desktop, free-standing, inline or cobot combined systems, and widely used in global electrical, electronics, home appliances, automobile, telecom, pharmaceutical, automotive electronics, semiconductor, aerospace, LED and more.

 

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