"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."
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.
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Gravity Casting Parts,Aluminum Alloy Gravity Casting Parts,Aluminum Gravity Die Casting Parts,Gravity Casting Aluminum Parts HSI INDUSTRIEL LTD , https://www.hsiindustriel.com
Gravity Die Casting
According to statistics from Shanghai Securities, as of yesterday, 38 of the 53 A-share LED companies have released first-half results announcements, 31 of which are pre-history, accounting for more than 80%. Looking at the reasons for the growth of the performance of various companies, most of them are the main business growth due to the recovery of the market. Specifically, among the 38 LED companies that announced the half-year performance forecast, the net profit of 12 companies increased by more than 50% year-on-year. Among them, the net profit of Lianjian Optoelectronics, Huacan Optoelectronics, Yisheng, Shiyida and Zhouming Technology doubled. The growth rate was 270, 215, 176, 118 and 113 respectively. Dongjing Electronics was the first to lose, and its net profit fell 13 times year-on-year. The sales of Maoshuo Power, Keheng, Nanda Optoelectronics, Ruifeng Optoelectronics and Ganzhao Optoelectronics were respectively Declining 94.5, 57.48-75.70, 32.81-44.49, 10-25 and 5-25. For the performance growth, it is transforming from LED manufacturers to outdoor advertising operators. Lianjian Optoelectronics said that the Sichuan timeshare advertising media limited by the company’s acquisition is limited. The company began to include consolidated statements in May, resulting in a net profit increase of 20 million to 21 million yuan, and a significant increase in sales of its wholly-owned subsidiary Linkage Culture (Beijing) Co., Ltd., which achieved operating income of 9.77 million yuan in the first half of this year, compared to last year. The same period was only 1.35 million yuan. The increase in the performance of Weiwei shares was also mainly due to the increase in non-recurring gains and losses. However, Huacan Optoelectronics, which has also doubled its growth rate, said that the main reason for the sharp increase in the first half of this year was that the growth of demand for LED chips in the market continued to maintain and the profitability rebounded significantly. At the same time, with the commissioning of the third-phase expansion project of the parent company and the construction of the first phase of the Suzhou subsidiary, most of the production capacity and sales scale of the company increased exponentially during the period. Zhou Ming Technology said that the main reason for the improvement of the company's operating performance in the first half of the year was the implementation of the market strategy formulated by the company in the early stage. The company increased its expansion and investment in the foreign trade market. The export orders increased significantly compared with the same period of last year, and the export income also correspondingly. increase. The reporter found that most of the 31 performance-preferred companies attributed their growth to the growth of their main business. In the first half of the year, net profit increased by 118.09, 80-50, 60-30, 50-20, 50-25 and 35-10 respectively, Yida, Liard, Hongli Optoelectronics, Alto Electronics, Jufei Optoelectronics, Wanrun Technology, Without exception, the reasons for the growth of the first half of the year were based on the rapid growth of the LED market, the gradual release of the company's production capacity, and the increase in sales revenue, which led to the growth of net profit. Even companies with performance losses have also mentioned the recovery of the LED market. Maoshuo Power pointed out that the company's sales receipts compared with the same period of last year, the main business income maintained steady growth. Ruifeng Optoelectronics, Nanda Optoelectronics, and Dehao Runda also made similar statements. Of course, there are exceptions in loss-making enterprises. In the first half of the first half of the year, Dongjing Electronics suffered a large loss. It was mainly affected by the fierce competition in the quartz crystal components market. The price of the products has declined and the LED sapphire substrate project has not yet formed a large-scale production capacity, and the fixed cost is relatively high. A Shenzhen-based brokerage researcher who has long tracked the LED industry told reporters that from the overall situation, the overall trend of the LED industry has been established. From the perspective of the industry chain, the LED lighting has been warming up since the second half of last year. The market is passed to the middle and upper-end packaging and chip fields. For example, Huacan Optoelectronics, which has doubled this time, is mainly engaged in LED epitaxial wafers and chips. It is worth noting that the Shenzhen Stock Exchange interactive platform shows that since July, institutions have conducted research on LED-related enterprises, including Meiya Optoelectronics, Yuanfang Optoelectronics, AVIC Optoelectronics, Lianjian Optoelectronics, Zhouming Technology, and Guoxing Optoelectronics.