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According to DIN 8586, roll forming is a bending technology with rotating tool motion to produce open and closed profiles [3]. Several pairs of forming rolls are aligned one behind the other for the forming process. The friction between the rotating forming rolls and the sheet metal causes a forward movement of the sheet. Simultaneously the…[ 続きを読む ]

Electric cables are normally installed on the assumption of a safe working life

Electric cables are normally installed on the assumption of a safe working life of at least 20 years. Changes in the insulating material take place with the passing of time and these changes, which may eventually result in an electrical breakdown, are…[ 続きを読む ]

An implicit, time-accurate 3D Reynolds-averaged Navier-Stokes (RANS) solver is used to simulate the rotating stall phenomenon in a plastic centrifugal fan. The goal of the present work is to shed light on the flow field and particularly the aerodynamic noise at different stall conditions. Aerodynamic characteristics, frequency domain…[ 続きを読む ]

3 Ways Suspended Platforms Increase Efficiency for Vertical-Vessel Maintenance

It’s time to upgrade maintenance practices for vertical vessels. Like any routine maintenance, inspecting, removing and replacing refractory in vertical vessels places a costly burden on facilities in terms of downtime and lost productivity. One of the main r…[ 続きを読む ]

The float glass process, which was originally developed by Pilkington Brothers in 1959 (Haldimann et al., 2008), is the most common manufacturing process of flat glass sheets. More than 80–85% of the global production of float glass is used in the construction industry (Glass for Europe, 2015a). In the float glass process, the ingredients (…[ 続きを読む ]

A review on the durability of PVC sewer pipes

Polyvinyl chloride (PVC) has become one of the dominant construction materials for sewer systems over the past decades, as a result of its reputed merits. However, since PVC sewer pipes have operated for decades in a hostile environment, concern over their longevity has been lately raised by…[ 続きを読む ]

The forging of metals and alloys is one of the oldest metal forming techniques used by humankind. Forging processes were improved over the centuries and are still being refined. Today, we are certain that there is no limit to these improvements and that we will never reach the point when we can say that nothing more is to be done. Despite the…[ 続きを読む ]

Ahead, discover all the winners and a thorough breakdown of our testing methods. We’ve also included a primer on the merits of different liquor glass shapes. 

Zalto is widely considered the gold standard of glassware by wine connoisseurs and professionals alike. It is made of mouth blown, nonleaded crystal; it’s incredibly light; and…[ 続きを読む ]

Stress Distribution at the Fillet of an Internal Flange

This paper deals with the determination of the stress distribution at the fillet of a ANSI B16.5 flanges attached internally to a hollow cylinder. A load parallel to the axis of the cylinder and of variable eccentricity acts on a bearing plate which rests on the flange. The strains are…[ 続きを読む ]

Carpet constitutes about half of flooring in the United States and is thus prevalent in the indoor environment [1]. Carpet can benefit an indoor space through sound reduction, aesthetics, comfort (both softness and temperature under foot), and injury prevention. It has also received higher comfort ratings compared to solid floors like…[ 続きを読む ]

Overview of aluminum alloy mechanical properties during and after fires

Aluminum alloys are increasingly being used in a broad spectrum of load-bearing applications such as lightweight structures, light rail, bridge decks, marine crafts, and off-shore platforms. A major concern in the design of land-based and marine aluminum structures is…[ 続きを読む ]

Preventing Films from Marking Powder Coated Surfaces

Lignin is a natural broad-spectrum sun blocker due to its UV-absorbing functional groups, e.g., phenol units. UV absorbers can protect materials such as paints and plastic from sun damage.

Richard Venditti, North Carolina State University, Raleigh, USA, and colleagues have…[ 続きを読む ]

The Best Drinking Glasses

When it comes to glassware, the sexier vessels — a coupe, a flute, a wineglass — seem to get all the glory. But a simple glass cup (which can be just as appropriate for juice, wine, iced coffee, or yes, a G&T) gets used more than any of those options — and is just as worthy of praise. Whether you’re in the market…[ 続きを読む ]

Trenpro Technology: quality standard for switch plugs and sockets

What is the quality judging standard of switch plug and socket? Switch socket is used to deal with electricity, so it has a great relationship with the safety of power consumption environment. If you buy a poor quality switch socket, it is easy to cause electric shock and…[ 続きを読む ]

The Methods of Distinguishing the Quality of Crusher Wear Parts

Optimized maintenance is a key competitive advantage for an aggregate producer. Dealing with multiple service providers and brands can become a significant risk as response times, quality and inventories vary across suppliers. For crushers, it’s the spare parts that ensure o…[ 続きを読む ]

A Look at Two Different Print Technologies: Dye Sublimation and UV

Since the introduction of the first personal computer, we have been ushered into the “digital age.” Technology has transformed virtually every aspect of our daily lives, and this phenomenon has been no different in the digital printing arena. Digital printing technology is…[ 続きを読む ]

Aluminium in the Building and Construction Industries

Aluminum building materials is widely used in building because of its intrinsic properties of lightness and corrosion resistance.

Aluminum is used in external facades, roofs and walls, in windows and doors, in staircases, railings, shelves, and other several applications.…[ 続きを読む ]

The Best Window Curtains, According to Interior Designers

You may not appreciate the importance of window dressings — which, in addition to looks, provide privacy and block light — until you move into a place with naked windows. Luckily, adding curtains is one of the easier — and less expensive — projects you can undertake to transfo…[ 続きを読む ]