Dispensing system: building the intelligent cornerstone of electronic manufacturingDate:22 May 2019       Source:       Browse:263Back

Advanced dispensing machines and adhesives systems help modern manufacturers precisely and continuously locate various electronic manufacturing materials. Whether it is to improve the accuracy or efficiency of dispensing, whether it is to reduce material costs or to enhance the consistency and stability of dispensing process, more and more electronic manufacturing technicians are pursuing the same desired results: dispensing precise quantities of materials to specific locations on a repeatable basis. Nowadays, automatic control dispensing technology has become the mainstream, dispensing system will undoubtedly become one of the cornerstones of intelligent electronic manufacturing.

The market of dispensing machines is flourishing

At the end of the last century, with the large-scale demand for dispensing machines in Japanese electronic industry, Japanese dispensing machine manufacturers of modern American dispensing machines gradually appeared. In the 1990s, the development of Chinese mainland industry attracted a large number of enterprises from Japan and Taiwan, and professional dispensing machine manufacturers flooded into China. In the 21st century, domestic dispensing machines began to rise. 。 Because dispensing machine has a wide range of applications, such as integrated circuits, semiconductor packaging, printed circuit boards, color LCD screens, electronic components (such as relays, loudspeakers), electronic components, automotive components, etc., are inseparable from the accurate dispensing process. Therefore, with the rapid development of China's economy in the past 10 years, the electronic manufacturing industry is rapidly approaching, and the demand for dispensing machines and automatic dispensing machines is also increasing. Domestic dispensing machine manufacturers in China have sprouted and developed rapidly in response to the market demand. A number of dispensing machine equipment manufacturing enterprises have risen. At present, the number of domestic dispensing machine manufacturers exceeds 200.

From the point of view of demand, especially with the rapid growth of consumer electronics industry in recent years, the market scale of China's automatic dispensing machine industry has maintained rapid growth. According to the statistics of relevant institutions, the sales of automatic dispensing machines in China increased rapidly from 3074 in 2013 to 42207 in 2017, with a compound growth rate of 92.49%. It is estimated that the scale of this industry will be about 62.797 billion yuan in 2018 and about 158.968 billion yuan in 2024.

Continuous innovation of dispensing technology

High precision, consistency, automation and even intellectualization are the innovative directions of modern dispensing machine technology. On the one hand, with the widespread application of electronic glue, the application of dispensing equipment will be more extensive and diversified. Single component dispensing technology is relatively mature, and its development direction is automation and high precision; while dual component dispensing equipment is a very potential development field. On the other hand, with the rapid updating of electronic products, the increasingly miniaturization and miniaturization of electronic components, the assembly accuracy of components is increasingly demanded, which directly leads to the more stringent dispensing process of products in packaging. The dispensing technology must also meet the needs of the development of integrated circuit industry. In the future, dispensing technology must adapt to the needs of intelligent micro-systems and small size components, so that the size of dots and lines produced by dispensing will be smaller. On the basis of reducing production costs, dispensing speed, accuracy and consistency will be improved, and dispensing effect will be more stable in uncertain environment. At present, from the representative manufacturers of dispensing technology, Noxin EFD, Visco and Anda Automation are the best at home and abroad. The latest series of products all represent the future development trend of this industry.

Since 1963, the world's leading manufacturer of precision fluid dispensing systems, Noxin EFD (Hall W1 1308, Munich Shanghai Electronics Manufacturing Equipment Exhibition, 2019), has been focusing on providing the best dispensing equipment for each application. In 2018, Noxin EFD launched Performus X series fluid dispensing machine, which can reduce the operating differences between operators by accurately controlling the application of needle dispensing fluid, thus reducing production costs and increasing production. It is noteworthy that the new RV series four-axis automatic dispensing system, which is launched by Noxin EFD, is equipped with the proprietary Dispense Motion software and a fully integrated CCD intelligent vision camera. It can achieve first-class fluid positioning accuracy and control at any angle of 360 degree rotating plane. In April 2018, Noxin EFD's new pneumatic Liquidyn < P-Jet SolderPlus < solder paste injection system also won the prestigious Industry Excellence Award: EM Asia Innovation Award.

As a design and production company specializing in various kinds of viscous, shear-sensitive, solid particles and semi-fluid precision metering and conveying system products, ViscoTec Germany ViscoTec (Munich, Shanghai Electronics Production Equipment Exhibition Hall W112, Munich, 2019) has the greatest advantage of being able to successfully handle high-viscosity materials. ViscoTec ViscoTec's new preeflow eco-SPRAY precision screw metering sprayer is designed to quickly and evenly coat Panacol as a glue for mask and shape-preserving coatings. This new technology can achieve perfect effect, no matter spraying low viscosity or high viscosity UV glue can provide excellent edge clarity. With ViscoTec Visco's eco-SPRAY, it is easy to spray glue with a high viscosity of more than 10,000 mPas onto large-scale surfaces: even with high-viscosity materials such as Panacol's liquid sealant Vitralit FIPG 60102 or mask Vitralit MASK 20102, the new dispenser can still finish the spraying task quickly. The pure volume metering characteristic of eco-SPRAY system makes use of the principle of infinite cycle piston to carry out precise metering. No matter the viscosity and supply pressure, it can ensure accurate coating.

Dispensing Material: Perfect Choice

The types of dispensing materials used by manufacturers in assembly applications include adhesives, sealants, coatings, primers, lubricants, thread lockers and thermal gap fillers. They are made of epoxy resin, acrylic acid, polyurethane, polyurethane, polyurethane or silicone resin. They can be generally divided into epoxy resin system, silica gel material system, polyurethane material system and acrylic acid resin system. They can be cured when exposed to light (ultraviolet or visible light), heat, water or air.

When choosing dispensing materials, we must carefully consider the rheology, chemistry and mixing ratio, and fully understand the classification and characteristics of glue. Epoxy resin is an environmentally friendly adhesive, but its drying speed is slow and water resistance is poor, so it needs to be used in dry places. Water-based epoxy adhesive is an environmentally friendly adhesive made from resin as raw material, water as solvent or dispersant. Waterborne epoxy adhesive is one of the common glue used in dispensing machine. It is non-toxic, non-polluting, non-combustible, safe to use and easy to clean. Silica adhesives are non-toxic and non-polluting. High molecular weight enables them to form adhesive films with excellent properties. They have the advantages of low temperature resistance, flexibility, good bonding performance and wide adjustable range of physical properties of the films. The molecular structure of the adhesives has flexible molecular chains, showing excellent impact resistance, fatigue resistance, low temperature resistance, and the design of performance. The adhesives are flexible to rigid. It can be adjusted to meet the bonding requirements of different materials. Acrylic emulsion adhesive has excellent color retention, transparency, light and weather resistance, durability, low temperature performance, UV degradation, insensitive, high bonding strength and shear strength and excellent oxidation resistance. Polyurethane (PU) adhesive APU is a new type of polyurethane system, in which water is used instead of organic solvent as dispersing medium. Waterborne polyurethane (WPU) uses water as solvent, which is pollution-free, safe and reliable, has excellent mechanical properties, good compatibility and easy to modify. At present, from the point of view of representative manufacturers of dispensing materials technology, Hangao, Delu, Happy and other international brands represent the future development trend of this industry.

Henkel Hangao (2019 Munich Shanghai Electronics Manufacturing Equipment Exhibition Hall 1348) developed a complete set of materials in order to meet the demand of active and passive optical devices and achieve customer expectations for optical devices. Four new products developed by Hangao bring more possibilities for optical communication technology innovation, including: silicon-free thermal conductive gasket GAP PAD 3004SF provides engineers and designers with the greatest flexibility in design and assembly, and ensures the optimal thermal management in optical modules, which does not contain organic silicon formula and is designed for the optical communication industry; new high thermal conductivity semi-sintered solid crystal adhesive LOCTITE ABLESTIK ABP 8068T series achieves powerful package-level sintering performance, provides effective thermal management solutions at chip level, and overcomes the adjustment problems of traditional welding materials, thermal conductivity limitations of traditional solder glue and complex process of pure sintering paste. The new formulation of peelable thermal conductive sealant BERGQUIST GAP FILLER TGF 1500RW makes it easy to peel off the contact surface. And it will not cause damage to the fragile components; high cost-effective omnipotent adhesive LOCTITE Stycast OS8300 is suitable for all kinds of optical communication devices, components and modules, and has good adhesion to various substrates, such as glass, metal, PCB, FR4 and so on.

Deluxe DELO (Hall 1156, Shanghai Electronics Manufacturing Equipment Exhibition, Munich, 2019) Industrial Adhesive China Headquarters moved to a new location in 2018 to enhance the company's influence in China. The relocation was named "Building a Dream of the Future". More than 100 guests, including customers, partners, media reporters, representatives of the German International Chamber of Commerce and regional leaders, attended the opening ceremony of the new building. Delu China has been developing vigorously in recent years. Now, with the expansion of business demand, it has moved into a rebuilt building. The new building covers an area of more than 1200 square meters, four times that of the old site. In 2017, China surpassed Germany as the largest single market for this family business, and in the past two years alone, Deluxe's turnover in China has doubled.

Regardless of dispensing machine equipment or dispensing materials, with the vigorous development of China's electronic manufacturing industry and changes in various macro-environments, the automation level of dispensing system is constantly improving, and the ability to solve various process requirements is constantly improving, especially the intelligent technology represented by machine vision, software algorithms and machine learning is beginning to penetrate into this field. It is gradually building the cornerstone of the intelligent future of the electronic manufacturing industry.

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