SU1150467A1 - Method of manufacturing flat heat pipe - Google Patents

Abstract

A METHOD FOR MAKING A FLAT HEAT PIPE containing an artery and a flat wick, made of metal mesh, by making two body parts in the form of plates with ribs, forming steam channels, and connecting the body parts by placing them on opposite sides of the wick when the latter contacts the ribs, different the fact that, in order to simplify the technology and increase the heat transfer capacity of the pipe, prior to the manufacture of the body, the artery and wick are filled with non-conductive material with the formation of a galvanoplastic forms, then in separate areas the specified material is removed on both sides of the wick before exposing its surface, and parts of the body are made simultaneously by electrodeposition of the metal, first on the exposed areas of the wick before the formation of ribs, and then on the entire surface of the electroformed form, after removed from the body cavity. eaten about 4 F.

Description

The invention relates to heat engineering, in particular to heat pipe technology. The purpose of the invention is to simplify the technology and increase the heat transfer capacity of the heat pipe. Fig. 1 shows a galvanoplastic form in the form of a plate with longitudinal and transverse grooves; figure 2 is a cross-section of the electroformed form with the body of the heat pipe formed on it; on fig.Z - flat heat pipe, general view, partial section. Electroforming form 1 contains a grid 2 with artery 3, placed inside a flat plate 4 of plastic, on both sides of which is made up to the exposure of grid 2, extension 5, and transverse 6 slots communicating with it, having a rectangular cross-section. The walls of the housing 7 of the pipe are provided with longitudinal 8 and transverse 9 ribs. On the surface of the form 1 there is an auxiliary conductive layer 10. The manufactured pipe has filling tubes 11 and a steam channel 12 located at its ends. The flat heat pipe according to the proposed method is made as follows. Metal mesh 2 (for example, stainless steel), with a preliminarily folded artery 3 from its portion, is poured with low-melting plastic to form an electroforming form 1 in the form of a flat plate 4. On the side of both large flat surfaces, in plate 4, longitudinal 5 and transverse 6 grooves of rectangular cross section without reaching the end surfaces of the plate 4 by removing its material and stripping it before exposing the grid 2 (Fig. 1) As a result, from the side of each large flat surface in the plate 4 we get combing the comb shape (Fig. 1). Further, the exposed portions of the grid 2 are successively coated by electroplating, for example, with a layer of nickel 0.001 mm thick, a layer of copper 0.3-0.9 mm thick and a layer of nickel 0.025 mm thick. Nickel layer (thickness i 0.001 mm) acts as an underlayer, which ensures good adhesion of the subsequent copper layer. The current is supplied through the mesh 2. As a result, stiffening ribs 8 and 9 are formed in the material of the plate 4, and the mesh 2 is sandwiched between thema boundary between the grid and the housing wall (2). After the formation of ribs 8 and 9 of rigidity (Fig. 2), a conductive separation layer 10 is applied to the entire surface of the plate 4, which has high adhesion and the required mechanical and thermal properties. Silver or copper can be used as the material of the separation layer, which is applied by chemical silvering or copper plating. The release layer 10 can also be applied mechanically. After the separation layer is obtained, the main layer of metal is electroplated to form the entire body 7 with the filling tubes 11. For example, a nickel-cobalt alloy is applied as the main layer. Electrolytic buildup is produced from the sulfamic acid electrolyte. After formation of the housing 7, the material of the plate 4 is removed by melting through the filling tubes 11 and annealing in hydrogen at a temperature for 30 minutes to clean the internal surfaces and relieve internal stresses, while the grid 2 is left inside the housing 7, with the formation of a mesh capillary rnoy structure and artery 3 (fig.Z). Annealing at a temperature leads to a decrease in the electrical resistivity of the deposited layers of copper and nickel to almost the values of cast metals. Next, the heat pipe is tested for tightness, chemical cleaning and degassing are carried out, and charged with working fluid. .

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Claims (1)

METHOD FOR MANUFACTURING A FLAT HEAT PIPE containing an artery and a flat wick made of metal mesh by manufacturing two parts of the body in the form of plates with ribs forming steam channels and connecting the parts of the body with their placement on different sides of the wick when the latter comes in contact with the ribs characterized in that, in order to simplify the technology and increase the heat transfer capacity of the pipe, before making the case, the artery and wick are filled with a non-conductive material with the formation of an electroforming shape, s Then, in separate sections, the indicated material is removed from both sides of the wick until its surface is exposed, and parts of the body are simultaneously produced by electrodeposition of metal, first on exposed sections of the wick until edges are formed, and then on the entire surface of the galvanoplastic form, after which the non-conductive material is removed from the cavity of the body. SU. ..1150467 specifically to the technology of thermal inventions - simplification of the technology increase of heat transfer 1 1150467