A mechanical assembly for securing a first sheet to a second sheet includes a first projection having a first sidewall and a first top wall. The first sidewall extends from the first top wall at a first acute angle. The first sidewall includes a first top end and a first bottom end. A first discontinuity is defined in the first sidewall between the first top end and the first bottom end. A first base wall extends from the first bottom end. The first base wall extends generally parallel to the first top wall.

A method for producing a microchannel bundle heat exchanger (1) includes providing a multiplicity of tubular microchannels (2); incorporating the microchannels (2) in a weaving device; interweaving the tubular microchannels (2) with a plurality of warp wires (3) in the weaving device, and generating at least one heat exchanger mat (4) from the tubular microchannels (2) which are connected to one another by means of the warp wires (3); shaping at least one heat exchanger pack (8) from the at least one heat exchanger mat (4), in particular by folding and/or rolling up the heat exchanger mat (4); and adhesively bonding the tubular microchannels (2) at two mutually opposite end sides (9, 10) of the heat exchanger pack (8).

The present invention discloses a preparation method for a hollow radiator and a hollow radiator. The preparation method comprises the following steps: 1) providing a feed and an insert raw material; 2) molding the insert raw material into an insert; 3) placing the insert in a cavity of a mold, and filling the cavity with the feed by injection molding in such a manner that the insert is surrounded by the feed, thereby obtaining a green body with the insert; 4) performing debinding treatment on the green body with the insert to remove the insert, thereby obtaining the green body of a hollow structure; and 5) sintering the green body to obtain the hollow radiator. By the preparation method for a hollow radiator according to the present invention, a radiator of a complex hollow structure can be fabricated, and the heat dissipation effect of the radiator can be improved. Moreover, the airtightness and leakproofness of the radiator can be guaranteed for a long time.

A device for preparing a thermally conductive sheet with graphene fibers in an oriented arrangement includes a first mold and a second mold. The first mold is configured to press a first cuboid block, and the second mold is configured to repeatedly press the first cuboid block. The first mold is provided with a first mold groove. A first mold cover covers an opening end of the first mold groove, and the first mold cover and the first mold are configured to press the first cuboid block. A second mold groove is arranged on one side of the second mold, and a second mold cover is arranged at an opening end of the second mold groove. A movable thickness limiting block is arranged at a side of the second mold cover adjacent to the second mold groove, and is configured to be clamped in the second mold groove.

A method of building a heat exchanger includes forming the heat exchanger with layer-by-layer additive manufacturing. A first hollow annulus is formed. A body of the heat exchanger is formed to be integrally connected to and grown upwards from the first hollow annulus. The body includes an exterior wall and a heat exchanger core disposed within the exterior wall. The body defines an interior that is cylindrically shaped with an axis oriented parallel to a direction of gravity. The first annulus is disposed on a gravitational bottom of the body. A second hollow annulus is formed integrally connected to and grown upwards from a gravitational top of the body. Residual powder is removed from a bottom of the heat exchanger.

Flexible graphite and other graphite materials with surface micro-texturing, and methods and apparatuses for micro-texturing the surface of flexible graphite and other graphite materials are provided. Micro-texturing can be used to modify wettability and/or adhesion characteristics of a flexible graphite surface. Micro-textured flexible graphite materials can be advantageously used in applications where the material is in contact with liquid water or other liquids.

A thermal interface material is disclosed. The material includes: a sheet extending between a first major surface and a second major surface, the sheet including: a base material; and a filler material embedded in the base material. The base material may include anisotropically oriented thermally conductive elements. In some embodiments, the thermally conductive elements are preferentially oriented along a primary direction from the first major surface towards the second major surface to promote thermal conduction though the sheet along the primary direction. In some embodiments, the base material is substantially free of silicone. In some embodiments, the thermal conductivity of the sheet along the primary direction is at least 20 W/mK, 30 W/mK, 40 W/mK, 50 W/mK, 60 W/mK, 70 W/mK, 80 W/mK, 90 W/mK, 100 W/mK, or more.

A device for preparing a thermally conductive sheet with graphene fibers in an oriented arrangement includes a first mold and a second mold. The first mold is configured to press a first cuboid block, and the second mold is configured to repeatedly press the first cuboid block. The first mold is provided with a first mold groove. A first mold cover covers an opening end of the first mold groove, and the first mold cover and the first mold are configured to press the first cuboid block. A second mold groove is arranged on one side of the second mold, and a second mold cover is arranged at an opening end of the second mold groove. A movable thickness limiting block is arranged at a side of the second mold cover adjacent to the second mold groove, and is configured to be clamped in the second mold groove.

Disclosed herein is a thermal interface material comprising a sheet extending between a first major surface and a second major surface, the sheet comprising a base material; and a filler material embedded in the base material comprising anisotropically oriented thermally conductive elements; wherein the thermally conductive elements are preferentially oriented along a primary direction from the first major surface towards the second major surface to promote thermal conduction though the sheet along the primary direction; and wherein the base material is substantially free of silicone.

A solid thermal balancing composite material with lightweight is formed by a reinforced composite material pressured by a molding machine after going through a powder filling equipment. The reinforced composite material is a mixture of inorganic filler powders and polymer adhesives after granulation. The specific gravity of the solid thermal balancing composite material is no greater than 2.0. In addition, the present invention is adjustable in different shapes for various applications of heat dissipation.