Browse Topic: Spraying
University of Wisconsin–Madison engineers have used a spray coating technology to produce a new workhorse material that can withstand the harsh conditions inside a fusion reactor.
This specification establishes requirements for pressure-sensitive adhesive tape designed for masking and color separation during aircraft painting operations.
Engineers have created a highly effective way to paint complex 3D-printed objects, such as lightweight frames for aircraft and biomedical stents, that could save manufacturers time and money and provide new opportunities to create “smart skins” for printed parts.
In recent years, bearing electrical failures have been a significant concern in electric cars, restricting electric engine life. This work aims to introduce a coating approach for preventing electrical erosion on 52100 alloy steel samples, the most common material used on manufacturing bearings. This paper discusses the causes of shaft voltage and bearing currents, and summarizes standard electrical bearing failure mechanisms, such as morphological damages and lubrication failures. Alumina coatings are suitable for insulating the 52100 alloy steel samples because alumina coatings provide excellent insulation, hardness, and corrosion resistance, among other characteristics. The common method to coat an insulated alumina coating on the bearing is thermal spraying, but overspray can cause environmental issues, and the coating procedures are costly and time-consuming. Based on the research, this article briefly discusses employing plasma electrolytic aluminating to coat 52100 alloy steel samples, an eco-friendly and high-efficiency coating process. Coating experiments were conducted over different coating periods to determine the most appropriate thin film for 52100 alloy steel samples. Scanning electronic microscopy observations indicated that pores reduced as their size and porosity rose with the increased treatment time. Longer treatment period resulted in thicker coating layers, but a rougher surface. The results indicated that extending the coating period increased the insulating characteristics of the ceramic coating on 52100 alloy steel samples. The single piece of 20-minute coated sample had the best insulation property, compared with other single pieces. Two 20-min coatings sample combinations provided the best resistance (121-143 MΩ) and the highest breaking voltage (914-935 V). Coatings remained in good condition after thermal shock tests.
Combining manufacturing and paintshop processes with hardware and software similar to those used in the printing industry, Porsche says it has ready a new customization option for its 911 lineup that will allow customers to apply a custom design to the paintwork of the vehicle. To demonstrate the technique, Porsche initially is offering the ability to imprint the hood with a recreation of the customer's own fingerprint, but other customer-desired designs are intended to be offered later. The company developed the new “direct printing” paint method in conjunction with partners, saying the technique makes it possible to produce painted designs “that are not possible with conventional painting.” Currently, adding special designs on specific areas of a vehicle's sheetmetal typically is achieved by applying film graphics or so-called “skins,” but Porsche said that in terms of aesthetics and tactile sensation, the new paint process is superior to film-based appliques.
In order to achieve the Toyota Environmental Challenge of 2050 (zero CO2 emissions), we have developed an innovative coating system that achieves more than 95% transfer efficiency. In order to reduce paint loss in the painting process, it is necessary to eliminate overdust and bounce dust. The most important point is how to spray (atomization, particle flight, adhesion) without shaping air. We have developed a “super high transfer efficiency system” that eliminates the need for shaping air. We continue to challenge the development of innovative technologies to view the paint shop as clean and eco-friendly environment.
This specification covers the engineering requirements for finishing aircraft parts and assemblies with a black enamel.
1 Inside a paint booth to spray paint on vehicle bodies, bumpers, and other parts (hereinafter referred to as “works”), air whose temperature and humidity are controlled by air-conditioner is supplied by blower fans through filters. Dust-eliminated and regulated air flow is sent downward from top to bottom (hereinafter referred to as “downflow”) in the painting booth. Conventionally, paint which does not adhere to work in spraying (hereinafter referred to as “paint mist”) is collected while flowing at a high speed through a slit opening called venturi scrubber in a mixture of air and water. However, this mist collecting system using venturi scrubber requires a large space with a large amount of pressure loss while consuming substantial energy. By radically changing the mist collecting principle, we developed a new compact system with less pressure loss aiming to reduce energy consumption by 40% in a half-size booth.
This SAE Information Report provides automotive engineers with the basic principles of corrosion, design guidelines to minimize corrosion, and a review of the various materials, treatments, and processes available to inhibit corrosion of both decorative and functional body and chassis components.
The surfaces that shed drops helps with mitigation of icing. Shedding of drop depends on surface hydrophobicity, which becomes affected when exposed to water and/or UV. The hydrophobicity degradation of six (Spray SHS, Etched Al SHS, Hydrobead, Neverwet, Waterbeader, and WX2100) different super-hydrophobic surfaces (SHS), exposed to water or UV, were studied from the drop shedding perspective. Two methods were adopted for the hydrophobicity analysis. Among them, one is to study the contact angles (CA) and contact angle hysteresis (CAH) change at static state (i.e., no airflow) compared to the untreated surface. The other one is to analyze the change in critical air velocity (Uc) for a given drop exposed to airflow, on water/UV treated surfaces at room temperature (22 °C) and icing conditions (−1 and −7 °C). For the water/UV treated surfaces, the static CAH and Uc (for all temperatures tested) for drops on Etched Al SHS, Hydrobead, and Neverwet, were found to be less than the specified value for a surface to deem as under performing. Hence, from the overall analysis, Etched Al SHS, Hydrobead, and Neverwet, are considered retaining their performance fairly well at both room temperature and icing conditions after exposure.
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