History of Foundry and Die Casting in Hong Kong

1. An overview of the development of the foundry industry in Hong Kong

As one of the world’s economic centers, Hong Kong’s manufacturing industry is world-renowned for its high technology and excellent quality, and the first and foremost is the foundry industry that is “the foundation of manufacturing”.

In the foundry industry in Hong Kong, the die-casting industry occupies a dominant position. According to incomplete statistics, there are currently more than 1,500 enterprises related to casting and die casting in Hong Kong, and most of the enterprises (workshops) are located in Shenzhen, Dongguan, Guangdong, and in the Yangtze River Delta, Northeast, Northwest and other places. Most of the foundry enterprises in Hong Kong are sole proprietorships, but there are also joint ventures. There are more than 10 enterprises with annual sales exceeding 1 billion yuan, and hundreds of enterprises with annual sales exceeding 300 million yuan. Hong Kong casting products cover machinery and equipment, alloy materials, construction, automobiles, communications, electronics, 3C, power tools, sports equipment, home appliances, household appliances, sanitary ware, lighting, hardware, toys, gifts, accessories and many other industries. The annual output of zinc alloy die castings exceeds 200,000 tons, aluminum alloy die-castings exceed 150,000 tons, and magnesium alloy die-castings exceed 5,000 tons. Most of the products are sold to the international market.

Among the above-mentioned enterprises, there are more than 10 die-casting alloy manufacturers, with an annual output of more than 200,000 tons of alloy ingots; 7 die-casting machine manufacturers, with an annual output of more than 5,000 die-casting machines.

(1) Die-casting industry occupies a leading position

Due to the lack of industrial land, Hong Kong industrial enterprises rarely use one-storey factory buildings, mainly using multi-storey concrete structures, and some even have up to 30 floors, which is rare in the world. Therefore, the Hong Kong foundry industry is dominated by die-casting enterprises that can use multi-storey buildings, while very few enterprises adopt the sand casting process.

In the 1950s, the Hong Kong die-casting industry had about a dozen companies and hundreds of employees. In the 1960s, there were more than 100 die-casting companies and more than 2,000 employees. In the 1970s, only die-casting companies opened in the mainland. There are more than 200 and more than 20,000 employees. In the 1990s, there were more than 1,000 die-casting enterprises (including workshops) in the mainland with more than 300,000 employees. By the beginning of the 21st century, the number of die-casting-related enterprises was about 1,500. There are more than 400,000 employees in many enterprises. It can be seen that the Hong Kong die-casting industry has continued to grow for decades. See Table 1 for a breakdown of the output of Hong Kong’s foundry industry in 2006. The data includes the output in Hong Kong and the output of Hong Kong-owned enterprises in the Mainland.

(2) Zinc, aluminum, magnesium alloy die-casting

More than 90% of the world’s high-end toys with zinc alloy castings as the main body are produced by Hong Kong enterprises, with an annual output of 10 to 50 million toys.

The daily hardware parts made of zinc alloy die-casting parts, such as bathroom accessories, locks, zippers, leather belt fasteners, jewelry, home accessories, watch parts, etc., Hong Kong enterprises have high output and good quality, and are in a leading position in the world.

Aluminum alloy low-pressure casting shows a good development trend among Hong Kong-funded enterprises. The leading enterprises have advanced equipment and are equipped with 16 fully automated low-pressure casting production lines imported from the United Kingdom and other countries. The annual production capacity of automobile wheels (steel bells) is close to 10 million. The largest aluminum alloy die-casting plant has cold chamber die-casting machines with a tonnage of 125-4500 t, more than 100 units, and more than 300 machining centers for post-processing of castings; Die-casting of 6-cylinder engine heads and auto parts.

As my country is the country with the largest magnesium reserves and production in the world, the country is focusing on developing the magnesium alloy industry. The Ministry of Science and Technology of my country continues to fund companies and universities to set up many magnesium alloy scientific research bases. Many Hong Kong-funded enterprises participate in it. , mold, magnesium alloy modification and other aspects have made great progress, not only in 3C products, power tools, auto parts, military products, but also in runners and waste recycling and re-refining and surface treatment. The problem of low yield has also been solved. solved.

(3) Ductile iron castings have become the world’s No. 1 injection molding machine in Hong Kong

The injection molding machine industry in Hong Kong has a considerable scale. There are about 20 production enterprises, and about 11 are currently active in the market. The annual output of injection molding machines is about 35,000 units, ranking first in the world. Many structures on the injection molding machine The parts and the pressure plate are all ductile iron castings, thus promoting the production of ductile iron castings. Since 2010, the demand for ductile iron castings for die casting machines, injection molding machines, ships and railways has increased, and the annual output of ductile iron castings in Hong Kong has exceeded 100,000 tons.

(4) The output of centrifugal casting and electroforming jewelry is the highest in the world

Jewelry made in Hong Kong has become a must-buy item for tourists around the world because of its unique and novel design, while gold, silver and precious metal jewelry is mainly formed by centrifugal casting and electroforming. According to incomplete statistics, in recent years, the annual gold consumption of Hong Kong-made gold jewelry has reached 160 t, and the annual silver consumption of silver jewelry has reached 450 t; there are about 500 jewelry production plants (points), employing more than 100,000 people.

(5) The output of simulated car models and toys ranks first in the world

Hundreds of Hong Kong-funded enterprises are engaged in zinc alloy die-casting simulation car models and toys in the Mainland. Many enterprises have more than 3,000 employees, and there are no less than 10 enterprises with more than 10,000 employees. At the peak, the annual output of car models and toys exceeded 50 million. 90% of the world’s high-end car models are produced by Hong Kong companies, and the models of many famous brands in the world are also manufactured by these companies. “Hand of China” holds up the model and toy industries all over the world.

(6) High output of beryllium bronze molds

Hong Kong is the world’s largest toy procurement center. The toys produced by Hong Kong companies account for more than 50% of the world’s total, which has led to the production of beryllium bronze molds for plastic injection molding. There are about 10 large-scale beryllium bronze mold-making enterprises, with an annual production of about 18,000 sets of molds and a consumption of about 840 t of beryllium bronze, ranking first in the world. In addition to producing beryllium bronze molds, some mold factories also cast a small amount of stainless steel injection molds and H13 molds of die-casting metal.

(7) The output of die casting machines accounts for half of the country

The hot and cold chamber die-casting machines produced by Hong Kong-owned die-casting machine manufacturers are widely used in precision die-casting of zinc alloys, aluminum alloys, copper alloys and magnesium alloys, with an annual output of about 5,000 units, accounting for more than half of my country’s output; No. 8 ~ 9000 t, complete models, long-term selling at home and abroad, is highly regarded as the most cost-effective products. Among these die-casting machine enterprises, the annual production capacity of a single leading enterprise reaches 2,500 units, ranking first in a single die-casting machine manufacturer in the world and also in my country.

2. An overview of the development of the foundry industry in Hong Kong from the 1950s to the 1970s

From the 1950s to the 1970s, due to the prosperity of Hong Kong’s textile industry, shipbuilding industry, light industry, and toy industry, the demand for castings exploded. There were more than 1,000 supporting foundry enterprises (workshops) built before and after. Factories and small workshops; the main products are marine castings, textile parts, mechanical parts, hardware parts, cast pipes and accessories, lock parts, toy parts, casting molds, etc.

(1) Example of the situation of the first foundry enterprise

Under the leadership of a group of “Old Xing Zun”, the Hong Kong foundry industry has achieved development through continuous hard work and courage.

1. Lianfa Hardware Foundry

In 1966, with a starting capital of 20,000 yuan, Lianfa Metal Foundry was established in Yau Ma Tei. At the beginning of the establishment of Lianfa Hardware Foundry, there were only one furnace worker and two sand turning workers, who produced casting sewing machine parts, hardware parts, mechanical parts, etc. Four years later, the factory moved to Dawoping. Thanks to the focus on process technology, the quality of castings, and the ability to sum up experience, the company has continued to expand and has more than 10 employees.

2. Zhenye Foundry

In 1964, Zhenye Foundry was established in a dilapidated shed to produce castings such as marine propellers. In line with the way of fast delivery, low price, good quality, and customer acquisition, Zhenye Foundry has developed rapidly, the workshop has expanded to more than 3,000 square meters, the number of employees has increased to more than 20, and the daily melting of copper is 3 tons. Known as the “Bronze King”, he has a prominent reputation.

3. Cheung Hing Iron Works

In 1958, Xiangxing Iron Works began to cast mechanical parts by hand sand casting. The factory attaches great importance to and is committed to improving product quality and independently developing new products, creating its own “CHF” brand, and cooperating with foundries in Hubei, Guangdong and other places to export castings. Technological upgrades in foundries.

(2) The market of non-ferrous alloy molds for plastic flower belts is prosperous

In the late 1950s, Hong Kong has become the world’s plastic flower manufacturing center, and the export of plastic flowers ranks first in the world. The manufacture of plastic flowers requires a large number of molds for casting petals. These molds are mainly made of copper, aluminum and zinc alloys. Therefore, a large number of small non-ferrous foundries have been established one after another to meet the market demand.

(3) Recycling and utilization of scrap metal materials

During this period, the scrap metal purchased mainly came from various metal parts obtained from ship dismantling, scrapped automobile parts, scrap bearings, scrap military supplies, etc. In order to meet the needs of a large number of die-casting plants and foundries for alloy raw materials, the scrap purchase station classifies the received scrap metal, and the classified metal is remelted into alloy ingots in a simple melting furnace (Figure 1 is a pit melting furnace). They are respectively sent to the corresponding die-casting plants and foundries to be used to cast copper alloy propellers, zinc alloy hardware, locks, aluminum alloy fan parts, and household appliances; the mold steel cast from scrap gun steel is reprocessed. Make a mold. It can be seen that Hong Kong has started a “circular economy” since this period.

(4) The budding and blossoming of the die-casting industry

In 1949, Zhonghua Taiji, a famous lock factory in Guangzhou, established the South China Lock Factory in Hong Kong. At this time, several other lock factories in Guangzhou also opened factories in Hong Kong, bringing with them the machines and technologies for making locks. These new factories operating in the form of “front shop and back factory” and some local metal products factories in Hong Kong have all started the research on die-casting technology of lock parts in order to mass-produce locks of better quality. The first soil-based manual die-casting machine used, commonly known as “Ma Liu machine” (see Figure 2), uses the body mass to press the handle on the top of the machine to press the alloy melt, press it into the cavity of the mold, and die-cast it. Components.

In the 1950s and 1960s, the die-casting equipment and technology of enterprises were generally relatively simple. In terms of smelting, pig iron is used to surround the furnace, and asbestos paper is used to surround the furnace edge for heat insulation; zinc ingots or zinc alloy scraps are added to the furnace, and aluminum flakes are added to the zinc liquid to improve the fluidity, and the temperature of the molten liquid is estimated with the naked eye. ; The funnel containing the alloy liquid should use asbestos paper as the inner pad, but because of the high cost, newspapers are often used instead. The mold material is scrapped gun steel, its texture is hard, and the processed mold has a long service life; the mold is an open-edge mold, and the screw is manually turned to close the mold. The thimble is forged and processed with a steel branch. make. In addition, the casting is polished with wood chaff. It is under such technological conditions that padlocks, drawer locks, door locks, etc. of “Goose Brand”, “Earth Brand”, “Sword Brand” and other brands have been manufactured. In addition to meeting the needs of the local market, they are also exported to Southeast Asia, Europe and the United States in large quantities. , West Africa and other regions.

In 1959, Ming Fung Industrial Products Factory manufactured the first die-casting machine in Hong Kong.

(5) With the development of light industry, the output of die castings increased sharply

In the 1970s, Asian industries developed rapidly. As one of the four Asian economic tigers, Hong Kong’s light industry was particularly developed. The export volume of light industrial products such as plastic flowers, mixers, hair dryers, radios, tape recorders, and fans ranked first in the world. First, it has promoted the development of Hong Kong’s die-casting industry, which provides die-casting parts.

After the oil crisis, countries reduced the use of air conditioners, and decorative ceiling fans were widely popular around the world, which led to a boom in the production of aluminum alloy die-casting fan parts. Hong Kong enterprises have successively introduced advanced large-scale cold room machines from Europe, the United States, and Japan. The fans manufactured include household fans, industrial fans, palace-style decorative fans and many other styles. They are not only sold locally, but also exported to Europe, America, Southeast Asia and other regions. The production and sales ranks first in the world.

Hong Kong’s textile and garment industry is developed, and many garments are equipped with zinc alloy die-cast jewelry and watch buckles, shoe buckles, belt buckles, zipper pullers and other clothing. These accessories were originally popular styles in Italy and other European countries at that time, especially after the breakthrough of electroplating technology, Jewelry made in Hong Kong is famous all over the world for its fashion and sophistication, and its production volume ranks first in the world.

During this period, the cases of many brand watches were cast in Hong Kong, and the parts were imported from Switzerland; the export of watches and accessories made in Hong Kong was only 4.2 million Hong Kong dollars in 1967, and increased to 78 million Hong Kong dollars in 1969. Main assembly center. In the 1970s, zinc alloy die-casting watch cases prevailed by volume, and some factories could produce 100,000 pieces per day. Since 1978, Hong Kong has exported 300 million hand expresses every year, ranking first in the world in quantity.

In addition, small household appliances such as mixers, irons, steak stoves, and toasters, stationery such as globes and pencil sharpeners, and small models such as radios, telephones, gramophones, and pianos all require die-casting enterprise supporting products.

3. Overview of the development of the foundry industry in Hong Kong in the 1980s and 1990s

(1) The upsurge of setting up factories in the Mainland is on the rise

In the 1980s, on the one hand, the rapid growth of the domestic economy and the vast market composed of a huge population provided excellent development opportunities for Hong Kong enterprises; on the other hand, Hong Kong had advantages in technology, capital, talents and overseas markets. During this period, Hong Kong’s manufacturing industry began to migrate to the mainland, especially the Pearl River Delta, on a large scale, triggering the reallocation of production factors and resources in the two places. By the early 1990s, there were 23,000 and 80,000 newly-built Sino-Hong Kong joint venture or Hong Kong-owned enterprises and processing plants in Guangdong respectively. A considerable number of these enterprises or processing plants were die-casting plants and their supporting plants. About 60% of the equipment is sold to the mainland.

In 1988, Feng Jiutu introduced a batch of die-casting machines from Hong Kong to Gaoyao, Guangdong, and founded the first Sino-Hong Kong joint venture die-casting enterprise – Gaoyao Hongtu Industrial Co., Ltd., specializing in the production of aluminum alloy parts such as automobiles, motorcycles, and home appliances; , More and more die-casting enterprises are born in Gaoyao, and Gaoyao has developed into one of the largest die-casting industrial bases in my country.

When many Hong Kong companies moved their die-casting production bases to Shenzhen, Dongguan and other places, it accelerated the adjustment and technological upgrading of Hong Kong’s die-casting industry structure. The investment environment in the Mainland is good, and the prices of production factors are low, which reduces production costs, thereby enhancing the competitiveness of products in the international market, increasing profits, and enabling enterprises to continuously expand their production scale. This has attracted more people to set up factories in the Mainland, which has boosted the development of the foundry industry in the Pearl River Delta.

In the early 1990s, the transportation, road and bridge infrastructure in the mainland was still backward, the power was insufficient, and the power was often cut off. The communication capability was weak, and Hong Kong mobile phones could not be used. But the firm belief supported everyone to overcome the extremely difficult production and living conditions. With the step-by-step improvement of infrastructure, the efficiency and efficiency of enterprises have been improved, and the cost of time and logistics has been saved, thereby accelerating the development speed; with the improvement of the investment and business environment, more Hong Kong people have been attracted to Shenzhen and Dongguan to open die-casting plants , mold factory, etc.

(2) Technological level improvement and breakthroughs

1. Mechanized and automated production

During this period, the manufacturing technology of die-casting machines improved, and the production process of die-casting was replaced by mechanization and automation, and the production efficiency was greatly improved; the central melting furnace began to treat alloy liquid, especially temperature control and impurity treatment, which improved the quality of the alloy liquid and reduced the the rejection rate of castings.

2. Die-casting 3C product castings to improve the overall equipment level

In 1982, Hongtu Hongtu began to use aluminum alloy die-casting disk drive brackets, hard disk components, computer brackets and casings, etc., which marked the trend of Hong Kong’s die-casting industry towards 3C products; then Pan Asia Group Co., Ltd., Lefeng Manufacturing Co., Ltd., Smart Aluminum Pin Hardware Products Factory, Kengli Industrial Co., Ltd., Jiarui Group Co., Ltd., Xiangyuan Precision Die Casting Co., Ltd. and many other enterprises have joined the ranks of die-casting 3C products. Due to the high requirements of 3C products on dimensional accuracy, many die-casting factories have invested heavily in the purchase of advanced equipment such as three-coordinate measuring instruments and CNC machining machines, thus improving the overall equipment level of the factory.

3. Computer-aided mold design greatly improves the level of mold design and manufacturing

The design of die-casting molds used to rely on the skills and experience of the masters. With the popularization of computers, the Hong Kong Productivity Council and the Australian International Lead and Zinc Association have vigorously promoted metal material flow simulation and mold design software, which has greatly improved the level of mold design and manufacturing. The first set of simulation software “CAST FLOW” was introduced from Australia by the Hong Kong Productivity Council, and then Hong Kong Fulai Company gathered professionals to develop the Chinese three-dimensional die-casting design software “DATCAST”.

(3) The emergence of a number of competitive large-scale enterprises

After nearly 20 years of struggle, many enterprises have entered a stage of rapid development after completing the original accumulation of capital. They have purchased land to build new factories, equipped with mechanized and automated production lines, and expanded their production scale. Lijin Technology Group Co., Ltd., Jiarui Group Co., Ltd., Dongguan Smart Hardware Technology Co., Ltd., Renxing Machinery (Foshan) Co., Ltd., Yi’an (Hong Kong) Co., Ltd., Lung Kee Group, Lee Kee Group Co., Ltd., Hong Kong Lianzhi Co., Ltd. and other large-scale enterprises with advanced technology have emerged, some of which have become national and provincial high-tech enterprises, some have entered the ranks of China’s top 500 machinery companies, and some have become listed companies.

The main characteristics of this group of enterprises are as follows:

1) Grasp the technology and market development trends, and formulate a clear international development strategy.

2) With core competitiveness, continuous technological innovation, continuous development of new products, and the use of new processes, new materials, and new equipment to improve production efficiency and form large-scale production.

3) Extend the upstream and downstream industrial chain from the two paths of “casting→processed part→finished product→component” or “accessory→equipment” to increase added value and improve enterprise efficiency.

4) Develop towards high-end customers and high-end products, and enter the ranks of the world’s top 500 supporting facilities.

5) Actively undertake national scientific and technological research projects, preside over or participate in the drafting of national standards, and establish industry-university-research cooperation with many high-tech research institutes.

4. The take-off of Hong Kong-funded enterprises in the Mainland

Thanks to the policy support of the country’s reform and opening up and the continuous struggle and enterprising spirit of the people of Hong Kong, in the 21st century, many mainland Hong Kong-funded and Sino-Hong Kong joint venture die-casting enterprises have been transformed and upgraded to integrate product design, scientific research and development, mold development, A large-scale modern enterprise integrating original equipment production, original design production, original brand production, and marketing, and has achieved fruitful results in scientific research, products, and markets.

(1) The pioneering lightweight die-casting products are rich and colorful

The development of a new generation of rare earth die-casting materials makes it possible to die-cast 0.3mm ultra-thin wall castings, which can be widely used in today’s new generation of 4C products, thereby influencing and promoting the design of 4C products. Shunjingyuan Precision Casting (Shenzhen) Co., Ltd. developed an aluminum alloy table tennis racket die-casting that broke through the thinnest aluminum alloy wall thickness limit of 0.5mm, and Yi’an (Hong Kong) Co., Ltd. pioneered the magnesium alloy car door die-casting in China; Jiarui Group Co., Ltd. developed 0.45mm magnesium alloy die-cast notebook case and 0.38mm zinc alloy die-cast mobile phone case, see Figure 3(a)(b)(c)

(2) Renxing Group developed the first semi-solid die casting machine in China

Die casting technology is applied to metal semi-solid forming, which has advantages in improving product quality, performance and reducing energy consumption. The parts materials produced by semi-solid processing involve aluminum alloys, magnesium alloys, composite materials, etc., which can be used in automobile, aviation, electronics, communication and other industries. In order to provide the equipment basis for the application of semi-solid new technologies, Renxing Group has developed the first semi-solid die casting machine in China (see Figure 4).

(3) Lung Kee Group became the No. 1 mold base manufacturer in Asia

Mold is the mother of industry, and China, which has become the world’s factory, has a huge demand for molds. Longji Group, located in Heyuan City, covers an area of ​​600 acres, has 6,000 employees, has 500 processing centers, and produces 40,000 standard (non-standard) mold bases per month. Its customers cover automobiles, communications, home appliances, toys, etc. The industry, scale and output have ranked first in Asia, and it is also one of the four largest formwork factories in the world.

(4) Lee Kee Group Co., Ltd. became the No. 1 non-ferrous metal supplier in Asia

With a solid foundation, continuous innovation and enterprising spirit, and the concept of “customer success, I succeed”, Lee Kee Group Co., Ltd. not only strives to provide customers with high-quality raw materials, but also provides technical support services, thus becoming the largest in Asia. non-ferrous metal material suppliers, customers all over the world. Lee Kee Alloy has become a well-known metal brand, and Lee Kee Group Co., Ltd. has also become the first Chinese member of the London Metal Exchange.

(5) LK Technology Group Co., Ltd. has become a world-renowned supplier of die casting machines

Since its establishment in 1979, LK Technology Group Co., Ltd. has established itself as a national brand based on independent innovation, and has now become a world-renowned die-casting machine manufacturer. The group has established 11 modern equipment R&D and production bases in Shenzhen (Shenzhen), Zhongshan, Shanghai, Ningbo, Kunshan, Chongqing, Fuxin, Anhui, Taiwan and Italy, covering more than 60 sales and service centers around the world, with sales and service coverage China, Japan, India, Russia, Southeast Asia, North America, Europe and more than 30 countries and regions. Entering the 21st century, LK Group has implemented an internationalization strategy. In 2008, LK Group acquired an established world-class die-casting machine manufacturer, IDRA Group (IDRA). A series of high-efficiency and energy-saving real-time control die-casting machines, 4,000-ton large-scale die-casting units and flexible die-casting production unit systems have been developed, enabling remote monitoring and diagnosis.

Advance technology and improve the quality of development. LK Group firmly grasped the innovation opportunity of the national “Tenth Five-Year” scientific and technological research plan “magnesium alloy application and industrialization project”, developed and manufactured China’s first magnesium alloy die-casting machine, the first 2000 tons, 3000 tons, 4500 tons ton die-casting machine, as well as China’s first two-plate die-casting machine and the first servo energy-saving die-casting machine, have filled the gap in the domestic die-casting industry with solid technological innovation. At the same time, timely grasp the significant demand brought by the rapid development of the automobile industry, and help China’s automobile industry to take a new step in the independent production. In 2016, LK Group’s 4,000-ton high-efficiency intelligent die-casting island passed the national project acceptance, and realized the automation, informatization, and intelligent production mode of the management system of the 4,000-ton intelligent die-casting machine and surrounding supporting equipment, and the overall technology is at the leading domestic level; 2019 , successfully developed the world’s first super-large die-casting machine with a clamping force of more than 6,000 tons – DCC6000, breaking through the clamping force bottleneck of international die-casting machines since 2017, realizing the integrated die-casting molding of large-scale automotive structural parts, and opening up large-scale die-casting The prelude of the era, injecting new impetus into the die-casting industry; in April 2021, LK DreamPress 9000T came out (see Figure 5).

Following the 6000T die-casting unit, it once again broke the record of die-casting unit clamping force, and promoted a huge change in the manufacturing mode of the entire automobile industry. LK DreamPress 9000T large-scale die-casting unit adopts one-step die-casting molding process, and has made great breakthroughs in technology and structure. Different from the traditional three-plate and two-plate die-casting units, on the premise of ensuring safety, stability and durability, the weight of the die-casting unit is reduced as much as possible through reasonable design and the application of high-tech materials, and the overall layout is optimized. It reduces the footprint of the die-casting unit, saves costs, reduces energy consumption, and has better performance and wider application range. The development of global super-large die-casting equipment manufacturing technology; in the second half of 2022, the 12,000-ton super-large die-casting unit independently developed by LK Group will be released and delivered to customers.

As a member of the International Organization for Standardization Foundry Machinery Technical Committee (ISO/TC306) and the secretariat of the Metal Thermoforming Sub-Technical Committee (TC186/SC2) of the National Foundry Machinery Standardization Technical Committee (TC186/SC2), LK Group has led or participated in the formulation of 2 international standards. There are 18 standards and 18 industry standards, contributing to the development of the industry and improving the international competitiveness and discourse power of China’s die-casting equipment.

LK LK brand die-casting machine has become the preferred brand well-known at home and abroad. It is the only enterprise in China’s die-casting machine industry that has been awarded the title of “China Famous Brand” by the State Administration of Quality Supervision. In 2021, LK die-casting machine will be selected into the fifth batch of manufacturing industries in China “Single champion product”, see Figure 6.

(VI) Jiarui Group has become a benchmark enterprise of green casting

Jiarui Group Co., Ltd. started from 2 die-casting machines, a 200-square-meter workshop, and produced belt buckles and fan parts. After years of hard work and progress, it has become a company with more than 100 die-casting machines, more than 4,000 employees, and annual sales of more than 1.7 billion Hong Kong dollars. Listed company. With the pursuit of excellence, unique core competitive advantages, strong production capacity and international quality management system, Jiarui Group has become a benchmark enterprise in the magnesium, aluminum and zinc die-casting industry.

In 1998, Jiarui Group became the first batch of 10 enterprises supported by the Hong Kong Special Administrative Region government to receive the “TQM” total quality management model training. In the process of continuous practice, its original “Jiarui management model” has established the grand goal of becoming a die-casting-oriented enterprise. Jiarui Group is innovation-oriented, and through one-stop diversified professional services, the company has developed rapidly and entered the supporting field for world-renowned brands of daily necessities and furniture products. The production scale and production capacity have been greatly improved; , transformed into lean production, modern management mode, so as to obtain sustainable development space. Its advanced management mode has been learned and applied by many manufacturers.

Jiarui Group always aims at green environmental protection and low-carbon production, strictly implements the ROHS international environmental protection standard in all production links, and passed the ISO14001 international environmental system certification in 2001. In addition, Jiarui Group has also established a closed zero-emission cleaning water circulation system (see Figure 7), an ion-exchange water treatment system, and a dust sedimentation tank. In 2016, Jiarui Group won the title of “China Foundry Green Demonstration Enterprise”, and Li Yuanfa of Jiarui Group won the “Hong Kong Industry Award”. In 2018, Jiarui Group won the “2018 Hong Kong Business Awards: Smart Productivity Award”. In 2019, Jiarui won the “China Nonferrous Metals Industry Science and Technology Award (First Prize)” and the “Guangdong Provincial Science and Technology Progress Award (Second Prize)”. In 2022, Jiarui won the “Outstanding Contribution Award in the New Energy Vehicle Industry”

Jiarui Group’s innovations cover materials, craftsmanship, technology, management and equipment. In magnesium alloy die-casting, a number of “firsts” have been created from products, processes to equipment, and a recycling model of “die-casting waste → recycled alloys → die-casting raw materials” resources has been realized. In 2007, Jiarui Group launched the first casting and forging dual-control forming machine in my country, which provided energy-saving, consumption-reducing and efficient manufacturing technology and equipment for the manufacture of automobiles, motorcycles and other parts. The project won the 2007 National Machinery Industry Technology Award. Progress Second Prize. Since 2007, Jiarui Group has been committed to the research and development of new rare earth magnesium alloy materials. It has successively cooperated with Chongqing University and the Chinese Academy of Sciences, and has achieved a number of achievements in the recovery and utilization of magnesium alloys and the modification and optimization of magnesium alloys by adding rare earth elements. . So far, Jiarui has successfully developed new materials such as high flow rare earth magnesium alloy and high thermal conductivity rare earth magnesium alloy. From 2018 to 2021, Jiarui Group launched 4,000-ton and 5,000-ton large-scale magnesium-aluminum alloy casting and forging dual-control die-casting equipment to provide integrated production services for large-scale castings and die-casting for new energy vehicles and construction industries.

VHGQ-151525 vacuum high-pressure gas quenching furnace has advanced technology and excellent performance. On the basis of the most advanced conventional temperature control system, a far-infrared temperature control device is added, which can monitor the temperature change of each workpiece surface in the furnace arbitrarily throughout the process to ensure that the workpiece temperature is accurate, evenly. At the same time, the flow guiding device of the cooling system is improved, and the cooling rate can be adjusted for any workpiece in the furnace according to the mold structure or technical requirements. Maximum bearing weight: 9T; Effective processing size: 1500x1500x2500mm; Maximum cooling air pressure: 15bar.

(8) Leave the achievements on the land of the motherland

The car model manufacturing industry in Hong Kong is very developed. In the most prosperous period, 90% of the world’s fine alloy car models were produced in Guangdong. In August 2013, Shenyang, China Industrial Museum Hong Kong Pavilion and Car Model Hall were completed. Hong Kong enterprises represented by Yunhao Group donated 1,200 high-quality car models, which reflected the glorious history of the automobile industry for more than 100 years and became the most famous car model. Popular science education base.

After decades of hard work and hard work by elites in the industry, and riding the east wind of my country’s reform and opening up, the Hong Kong foundry industry has achieved considerable development and achieved fruitful results, and has made remarkable contributions to the prosperity and stability of Hong Kong. contribute. Today, the foundry industry in Hong Kong is changing from labor-intensive to technology-based, and from extensive to fine-scale. While committed to improving the precision of products and the level of automated and intelligent production, it also vigorously reduces energy consumption and protects the environment.