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A Method for Attaching Fins in a Radial Pattern to a Central Core Utilizing Longitudinal Slots in the Core or a Surrounding Collar

IP.com Disclosure Number: IPCOM000010058D
Publication Date: 2002-Oct-16
Document File: 2 page(s) / 335K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for attaching fins to a central core by means of a slot (cut or extruded) in the core or core collar of a heat sink. Benefits include maximizing the available heat sink volume while simplifying the manufacturing process.

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A Method for Attaching Fins in a Radial Pattern to a Central Core Utilizing Longitudinal Slots in the Core or a Surrounding Collar

Disclosed is a method for attaching fins to a central core by means of a slot (cut or extruded) in the core or core collar of a heat sink. Benefits include maximizing the available heat sink volume while simplifying the manufacturing process.

Background

Currently, radial fin heat sinks are created by attaching extruded fins or folded fins to a core.  In addition, stamped fins have been attached by using solder.  With extruded fins, it is possible to attach a non-circular pattern of radial fins; however, the interface resistance to the copper core is typically high and the mass of the extrusion is large. When attaching folded fins, it is difficult, if not impossible, to attach a non-circular pattern of folded fins. In cases where the heat sink volume is rectangular, a circular fin pattern cannot maximize the volume.  For stamped fins attached using solder, there is increased manufacturing complexity and interface resistance.

General Description

The disclosed method attaches fins to a central core by means of a slot (cut or extruded) in the core or core collar of a heat sink (see Figure 1). This method uses stamped fins in a radial fin heat sink of various sizes without using solder.  For example, a radial fin heat sink with non-uniformly sized fins could be designed to fit a non-circular volume (see Figure 2).  In addition, the way the fins are at...