Vacuum plating is a description of the technology, device and reviews

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2018-07-14 03:00:28

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The Modification of various structures, components and functional elements is often performed by a complete change of the structure of materials. This used deep heat, plasma and chemical processing. But there is a large segment of the methods of change of operational properties due to external coatings. The solutions include vacuum metallization through which you can improve the decorative, conductive, reflective, and other characteristics of materials.

vacuum metallization

General information about the technology

The method consists in the spraying of metal particles on the work surface. The process of forming a new coating occurs due to the evaporation donor metals under vacuum conditions. The process cycle involves several stages, structural changes target the foundations and elements of the coating. In particular, it highlighted the processes of evaporation, condensation, absorption and crystallization. The key can be called the interaction of metal particles with a surface in conditions of special gas environment. At this stage, the technology of vacuum metallization provides the processes of diffusion and attaching the particles to the structure of the workpiece. Output depending on the modes of spraying characteristics of the coating and the type of workpiece you can get a variety of effects. Modern technical equipment allows not only to improve individual functional performance of the product, but also with the high accuracy to differentiate the properties of the surface in some areas.

Equipment

There are three main groups of machines used for this technology. This equipment is a continuous, semi-continuous and batch. Accordingly, they differ on the basis of the General organization of the manufacturing process. Aggregates with continuous action are often used in serial production, which requires production of vacuum metallization. Equipment of this type can be single and multi-camera. In the first case, the units are oriented to the implementation of directly plating. Multi-chamber models also provide the possibility of implementing additional procedures – primary treatment product, control, heat treatment, etc. This approach allows to optimize the manufacturing process. Machines for periodic and semi-continuous metallization typically have a single primary camera. Precisely because of the subpar production they are used for specific procedures, and preparation and the same quality control are carried out in a separate order – sometimes in manual mode without automated lines. Now is more to consider, some of the units consist of such units.

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repair of vacuum metallization machine

Device machines for metallization

In Addition to the main camera, where the processes of spraying equipment includes a set of supporting systems and functional components. The first is to allocate the sources of the sprayed material, communication, which contact is naturally complex. To install vacuum metallization could provide the need for a specific task of processing parameters, the feed channels spraying with regulators allow, in particular, to set the temperature level, velocity, flow directions and volumes. In particular, this infrastructure is formed by nakateleeli, pumps, valves, flange elements and other fittings.

In modern installations for the regulation of operating parameters of the used sensors connected to a microprocessor unit. Given specified requirements and fixing the actual values of current, equipment without operator can adjust the machining modes. To facilitate operating processes the equipment is supplemented with in-camera systems for cleaning and calibration. Thanks to this snap-in simplifies the repair of vacuum plating machine, because the constant and timely cleaning minimizes the risk of overloading of the pneumatic actuators, positioners and communication circuits. Last, and all are treated as consumable part replacement which in the continuous actions performed in regular maintenance practices.

roll vacuum metallization

The Target materials for metallization

First of all, the procedure is applied to the metal blank that can be made including special alloys. Additional coating required to provide anti-corrosion layer, improving the quality of electrical wiring or change of the decorative properties. In recent years vacuum metallization is increasingly used in the context of polymer articles. This process has its own peculiarities, due to the characteristics of the object structure of this kind. Less technology applies to products which have a low hardness. This applies to wood and some synthetic materials.

Features metallization of plastics

Plating on the surface of plastic parts is also capable of changing its electrical, physical and chemical properties. Often metallization is used as a means of improving the optical properties of such workpieces. The main problemwhen performing such operations is a process of intensive thermal evaporation, which inevitably puts pressure on the stream of particles napilasya the surface of the element. Therefore required special modes of regulation of the diffusion of the core material and consumable mass.

Has its own specifics and vacuum metallization of plastics, characterized by a rigid structure. In this case, will have the value of the presence of protective primer and varnishes. To maintain a sufficient level of adhesion, breaking the barriers of these films may require higher energy to thermal effects. But here again there is a problem with the risk of destruction of the plastic structure under the influence of heat fluxes. In the end, for the removal of excessive tension in the work environment are introduced modifying components such as plasticizers and solvents in order to retain the shape of the workpiece in an optimum state regardless of temperature.

Features of the processing film materials

vacuum metallization your hands

The manufacturing Technology of packaging materials include the use of metallising PET films. This process ensures elyuminirovanie surface, whereby the workpiece is endowed with higher strength and resistance to external influences. Depending on the processing parameters and final coating requirements can be used different ways a heat sink. Because the film is sensitive to temperature, introduced an additional procedure for the deposition. As in the case of plastics, it allows you to adjust thermal balance, maintaining the optimal for harvesting environment. The film thickness that is processed by the method of vacuum roll metallising, can be from 3 to 50 microns. Gradually introducing technology and providing such coatings on the surfaces of the material thickness of 0.9 ám, but for the most part this is only an experimental practice.

Plating reflectors

This is also private use of metallization. The target in this case are the car lights. Their design provides for the presence of reflectors, which over time lose their functional qualities – fade, rust and, as a result, become unusable. In addition, even the new headlight can obtain accidental damage, which will need repair and restoration. This task focuses on vacuum metallized reflectors, providing a wear-resistant coating on mirror surface. Filling the outer structure of metallic particles on the one hand eliminates minor defects, and with another-acts as a protective coating, preventing possible damage in the future.

vacuum metallization price

Process at home

Without special equipment it is possible to apply the technology of surface chemical coatings, but the vacuum treatment in any case will need a special camera. The first stage is preparing itself procurement – it should be cleaned, degreased and if necessary grinding. Further, the object is placed in a vacuum metallization chamber. With your hands, you can make and special equipment on the rails of the specialized elements. It will be a convenient way of loading and unloading of material, if will be processed in regular mode. As a particle source metallization applied the so-called blanks-aluminum, brass, copper, etc. the chamber is then adjusted to the optimum processing mode and begins the process of spraying. The finished product immediately after plating can be coated manually auxiliary protective coatings on the basis of varnish.

Positive feedback about the technology

Method has lots of positive qualities that mark the users of finished products in different areas. In particular indicated for high protective properties of the coating, which prevents corrosion and mechanical damage of the Foundation. Positive and ordinary consumers of the product, which was subjected to vacuum metallization to improve or change decorative qualities. Experts also stress and environmental safety of the technology.

vacuum metallized reflectors

Negative feedback

The disadvantages of this method of treatment include the complexity of technical organization of the process and high demands on preparatory activities of the workpiece. And this, not to mention the use of high-tech equipment. Only with its help it is possible to obtain high-quality coating. Also included in the list of disadvantages of vacuum metallization. The treatment cost of one element may be 5-10 thousand rubles. depending on the area of the target region and the thickness of the coating. Another thing is that the serial plating reduces the cost of individual products.

In conclusion

vacuum metallization of plastics

The Change of techno-physical and decorative properties of various materials enhances their further use. Development of a method of vacuum metallization led to the emergence of special areas of processing orientation on specific performance. Technologists are also working on simplifying thethe process of sputtering, which today manifests itself in the form of reducing the size of the equipment and reduction procedures post-processing. With regard to the application of the technique at home, it is the most problematic way of covering, as require by the presence of specific skills, not to mention hardware. On the other hand, more available methods of deposition do not allow to obtain coatings of the same quality – whether it's a protective layer or decorative stylization.


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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