China has lately witnessed an increase of so-called empty-nest youth

China has lately witnessed an increase of so-called empty-nest youth

China has lately witnessed an increase of so-called empty-nest youth, or young people who live alone, which experts believe is a cause for public concern.

Data from the National Bureau of Statistics shows that 12.45 percent of households were inhabited by one person in 2015. The figure in 2008 was 8.3 percent.

Specifically, of this "empty-nest" population, solitary young residents are especially common, the Xinhua News Agency reported.

The term "empty-nest" was originally applied to elderly people living alone after their children are grown and out of the house.

A report on empty-nest youth found that this group tends to feel lonelier than their peers, and their personal lives are largely confined to their rented apartments.

As they typically live far from work to save money on rent, these youth often spend hours commuting, leaving them exhausted in the evenings.

Even so, this population chooses to live in big cities, as they are attracted to the opportunities in such metropolises.

Meanwhile, empty-nest youth are more inclined to spend money on better food, high-quality clothes and digital products. Some 21 percent of the group have no savings or are slightly in debt, according to the report, which was conducted by Baidu Waimai and Wacai.com.

The emergence of empty-nest youth is a result of imbalanced social and economic development between big cities and smaller towns. It is also a natural result of China's ongoing urbanization, Wang Yingmei, an associate professor of psychology at Sichuan University, told Xinhua.

Still, experts warned that the growing size of this group could bring problems,affecting the population's psychology and marital aspirations. Some recommended that youth get in engaged in community activities.

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"Gravity Die Casting. A permanent mould casting process, where the molten metal is poured from a vessle of ladle into the mould, and cavity fills with no force other than gravity, in a similar manner to the production of sand castings, although filling cn be controlled by tilting the die."

Gravity Die Casting

Sometimes referred to as Permanent Mould, GDC is a repeatable casting process used for non-ferrous alloy parts, typically aluminium, Zinc and Copper Base alloys.

The process differs from HPDC in that Gravity- rather than high pressure- is used to fill the mould with the liquid alloy.

GDC is suited to medium to high volumes products and typically parts are of a heavier sections than HPDC, but thinner sections than sand casting.

There are three key stages in the process.

1. The heated mould [Die or Tool] is coated with a die release agent. The release agent spray also has a secondary function in that it aids cooling of the mould face after the previous part has been removed from the die.
2. Molten metal is poured into channels in the tool to allow the material to fill all the extremities of the mould cavity. The metal is either hand poured using steel ladles or dosed using mechanical methods. Typically, there is a mould [down sprue" that allows the alloy to enter the mould cavity from the lower part of the die, reducing the formation of turbulence and subsequent porosity and inclusions in the finished part.
3. Once the part has cooled sufficiently, the die is opened, either manually or utilising mechanical methods.

Advantages

• Good dimensional accuracy
• Smoother cast surface finish than sand casting
• Improved mechanical properties compared to sand casting
• Thinner walls can be cast compared to sand casting
• Reverse draft internal pockets and forms can be cast in using preformed sand core inserts
• Steel pins and inserts can be cast in to the part
• Faster production times compared to other processes.
• Once the tolling is proven, the product quality is very repeatable.
• Outsourced Tooling setup costs can be lower than sand casting.

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