The "black horse" in the field of new materials - the production method of liquid metal thermal film has been upgraded
Beigang United Intelligent Equipment Expert 2018-01-03 attention Liquid metal is an amorphous alloy, commonly known as "metal glass". It combines the excellent mechanical properties of metal with the easy processing and forming properties of glass. It is a high-tech field that supports future precision machinery, electronic information, aerospace, and defense industries. Key material. For the liquid metal manufacturing industry, the contradiction between supply and demand with low production capacity and large market demand has always restricted the development process of liquid metal industrialization, and the production mode of products needs to be broken.
Figure 1 Mysterious liquid metal Beautiful and practical material As early as 2010, Apple Inc. began researching the process of mass production of liquid metal in order to use it on the iPhone case. However, so far, we have not seen any apple products using liquid metal. The reason for this is that liquid metal is a new and distinctive material, and this new material technology does not have the right production equipment to make good use of it.
Figure 2 Schematic diagram of the thermal film production line High-end destined scarcity In the liquid metal to solve the "thermal barrier" problem of high-end devices, the contradiction between supply and demand of products is more prominent. The super heat dissipation performance of liquid metal thermal conductive sheets is 60-70 times that of water. Based on the unique thermophysical properties of low melting point metals, liquid metal Not only can it be widely used in chip thermal management of high-performance servers, desktop computers, industrial computers, notebook computers, and communication base stations, but also plays an indispensable role in many key areas, such as advanced energy (industrial waste heat utilization, Solar thermal power generation, focused photocell cooling, fuel cells), aerospace thermal control (satellite, thermal protection), optoelectronic devices (projectors, power electronics), LED lighting, micro/nano electromechanical systems, biochips and electric Automobiles, etc., the value of industrial applications is huge. The high-end use determines the high standards of product quality, precision and appearance. To meet such a large market demand, more stringent requirements are imposed on the production method of liquid metal thermal sheet.
Figure 3 Liquid metal thermal sheet cutting packaging production line A new breakthrough in the application of liquid metal industrialization The liquid metal thermal sheet is a new type of material. The rolling, cutting and packaging processes in the traditional production process are all completed by general general equipment. The equipment is not targeted, and the quality, precision and appearance of the product are difficult to guarantee. The main production in this field The process equipment is still in a blank stage. Beigang has more than 10 years of experience in R&D, design and equipment customization of new materials and process equipment. It has the integration capability of the entire industry chain in the field of intelligent manufacturing. When most companies are in the process of production line demonstration and technical research, Beigang has It has completed the development of automated production line for liquid metal thermal sheet cutting and packaging, and its technology is original and leading in the industry.
Figure 4 North Steel Union engineers are in the process of production line commissioning The production line adopts automatic rewinding and unwinding device to provide raw materials for cutting equipment. After the liquid metal strip is cut into thin slices, it is automatically grabbed by the robot, the visual system is synchronously detected, counted and automatically weighed, and the product is automatically wrapped by the packaging machine. And the thermoplastic closing, to achieve vacuum packaging, and finally after the coding and coding, the product is off the assembly line. The complete process of the production line is executed by automation equipment, without manual intervention, the production efficiency can reach more than 700 pieces/hour, which is more than three times higher than the traditional production capacity, eliminating more than 30 labors, and the product quality, precision and appearance are improved. . In the development of the line, the precision of the cutting equipment is the key. How to ensure the cutting precision while satisfying the rapid production rhythm of the product, and at the same time to be compatible with other specifications, is a problem that the R&D team must break. Beigang Group adheres to the company philosophy of “creating infinite possibilities”. After careful discussion and research, the die-cutting technology is the primary implementation. Die-cutting is generally used in the printing industry for paper processing. The secondary development and upgrade optimization can realize the cutting of liquid metal thermal conductive sheet and ensure no dust pollution during the cutting process, which lays a solid equipment foundation for the successful development of the production line.
Figure 5 liquid metal thermal sheet China leads the development of liquid metal industry Due to the significant strategic value of liquid metal, in recent years, developed countries have joined the ranks of exploration. For example, NASA in the United States listed liquid metal cooling research as one of the top ten topics in 2014. Studies have shown that liquid metal objects immersed in water can exhibit large-scale deformation, spin, and directional motion under low voltage; a large metal liquid film can shrink into a single metal liquid sphere in a few seconds, and deformation The process is very rapid, the surface area can be changed by up to thousands of times; the automatic fusion, breakage, recombination, etc. between the liquid balls can be free from the limitation of the size of the liquid metal object. The above rich physics landscape has revolutionized the basic understanding of the complex fluids, soft materials, and especially liquid metal materials in nature. These conformational transformation capabilities beyond conventional objects are difficult to achieve with traditional rigid materials or fluid media. It can be said that when these technologies are truly mature, liquid metal will truly become a "excellent dark horse" in the new materials discipline. Report / feedback
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