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Forging Heat Sink Manufacturing Press - Cold Forming Extrusion Press for heat sink production

With PURE ALUMINIUM cold-forging technology heat sink, the heat dissipation is 3 times better than die-cast aluminium.

Four column cold forging hydraulic extrusion press

Pillar type cold forging hydraulic extrusion press

Four column cold forging hydraulic extrusion press - Pillar type cold forging hydraulic extrusion press

50 - 800 Tons Servo Hydraulic Pressing Power with pillar guiding for heat sink extrusion forming

  • The use of a servo control system guarantee us to save 50-70% energy compared to a standard press.
  • Pressure stability,pressure error ±1bar,repeatable positioning accuracy up to±0.02mm.
  • Low failure rate,automatic alarm and fault indication,one-button reset function.
  • Remote maintenance service can be realized.
  • Can set up multi-stage pressure, multi-speed and contiouns fixed-pressure function.
  • Adopting an integral frame structure, high strength, low distortion and durability.

Sliding cold forging hydraulic extrusion press

Frame Precision Hydraulic Molding Machine - H-frame cold forging hydraulic extrusion press

Sliding cold forging hydraulic extrusion press - H-frame cold forging hydraulic extrusion press

100 - 1500 Tons Servo Hydraulic Pressing Power with Frame guiding

Frame Precision Hydraulic Molding Machine 

1. Using advanced hydraulic system, more steady, safer and more reliable.

2. Pressure, stroke and pressure keeping can be adjusted according to processing requirement.

3. Four columns are made of high-strength alloy steel with hard chrome plated surface and good abrasion resistance.

4. The moving bolster and worktable are equipped with optional ejecting cylinder, which meets different ejecting requirements of different products.

5. Digital control is achieved with PLC programming circuit design and touch panel operating system.

Cold forged heat sinks : simply superior thermal behavior

High performance heat sinks

Forged heat sinks offer advantages over machined, die cast and extruded processes. The improved thermal performance due to aluminium grain structure coupled with the increased surface area without increasing the size of the heat sink and low process cost are main advantages.

Cold forging can also produce heat sinks of the complex shapes such as elliptical fins, staggered fins, round pin arrays, steps, all within the tool. Finally, precision forged heat sinks can often be manufactured at a lower cost because most operations can be performed in the tool and secondary operations are reduced.

Forging is also the most effective method for forming copper. Copper is difficult to extrude because it must be heated to high temperatures to soften the metal, making it challenging. Forging is a cold process, and copper heat sinks can be formed with minimal waste.

A Cold forged heatsink is a good alternative to casting to form complex shapes with excellent thermal conductivity. The Cold forging process can make almost perfectly straight allowing for more fins per square mm. Cold forged heatsink shapes include plate fin heat sinks, round pin heat sinks, and elliptical fin heat sinks. Cold forged heatsink manufacture lends itself very well to using copper because high temperatures are not required to shape the copper heatsink, and it can be formed with minimal damage. Secondary machining operations such as hole, chamfer, and steps can be usually included in the cold forged heatsink manufacture reducing waste. Forging involves the shaping of metal using localized compressive forces. 

A Forged heatsink is manufactured using a modification of this process called cold forging.  Cold forging uses high pressure and low temperature to ensure that no air bubbles, or other impurities are trapped in the material. This improves the thermal properties of the heatsink, and increases the density of the material. Pressmach utilizes and delivers on demand special open die tooling and intense high pressure presses to produces high precision heatsinks with high aspect ratios.  A Forged heatsink is typically manufactured one part at a time, and can be can be made from AL 6063 or C1100. Aspect ratio up to 35:1 are feasible, and no draft angles required on fins. Fins can be round, elliptical, straight or any combination on the same part.

An added benefit of this process is that a forged heatsink of the same design can be manufactured with different heights using only one set of forging die. When working with high aspect ratio, or dense fins a forged heatsink has no thermal interface between the fins/pins, and the base which will provide better performance compared with stamped-fin or bonded-fin heat sinks. Heat distribution can be further improved in aluminum heatsinks by embedding a copper inserts into the base during the forging. As this process is fairly expensive, for small volumes it may be worth exploring extrusion with a cross cut to produce square pins. For larger volumes die cast is a good alternative.