Die-casting aluminum alloy smelting is an important process in the die-casting production process. If the smelting process is not strictly controlled, the slag and gas content of aluminum (abbreviated as: Al) liquid will increase, and the chemical composition will change, resulting in pinholes, oxidation slag, shrinkage and unqualified chemical composition in the casting, affecting the quality of the casting. Die-casting aluminum alloy is easy to absorb air and oxidize during the smelting process. During the continuous melting process, oxidation slag will be generated on the surface and inside of the Al liquid. The smelting raw materials are divided into Al ingots and recycled materials. The slag content of recycled materials is higher than that of Al ingots. After smelting, the oxidation slag in the Al liquid will increase accordingly. The oxidation slag is easily adsorbed by the gas in the Al liquid, making it difficult for the gas to precipitate from the Al liquid. Due to the presence of gas and oxidation inclusions in the Al liquid, shrinkage cavities, pores, slag inclusions and other defects are generated in the die casting. High-quality Al liquid should have the characteristics of qualified chemical composition, low content of gas and oxidation inclusions, good casting performance, and satisfactory mechanical properties of castings. Starting from the main links that affect the quality of Al liquid during the smelting process, the effects of each link process are tested to determine the optimal process parameters of each smelting link, effectively improve the quality of Al liquid, and thus meet the production needs of die castings. There are many types of inclusions in Al liquid. In addition to the material shedding of the furnace body itself, most of them come from recycled materials. The recycled materials will form oxide inclusions such as aluminum oxide and magnesium oxide during the placement and melting process. Since the recycled materials cannot be absolutely clean, and the surfaces of the gates and unqualified die castings will adhere to oily substances and be relatively moist, a large amount of smoke and water vapor will be generated during the melting process, which is the main source of hydrogen. After density testing and metallographic analysis of Al ingots before smelting and recycled materials after casting in the same furnace, it was found that the hydrogen content and inclusions in the recycled materials increased significantly. Conclusion: (1) In the process of aluminum alloy smelting, the recycled materials need to be clearly classified; for castings with dense internal structure and airtightness requirements, the recycled materials ratio is controlled within 30%, and the recycled materials ratio of ordinary castings can be relaxed to 40%. (2) Keeping the melting temperature of aluminum liquid at 720-750℃ can reduce the absorption of aluminum liquid. (3) In order to ensure the refining and degassing effect, the refining an...

Pressure casting (referred to as die casting) is to fill the die casting cavity (die casting mold) with liquid or semi-solid metal at a high speed under high pressure, and to form and solidify under pressure to obtain castings. Die castings have high dimensional accuracy, generally equivalent to level 6~7, or even level 4; low surface roughness; high strength and hardness, 25%~30% higher than sand casting, stable dimensions, good interchangeability; thin-walled complex castings can be die-cast, with high production efficiency and long die-casting mold life. When die-casting aluminum alloys, it can reach 80,000~200,000 times, so the die-casting process is widely used in photovoltaics, 5G communications and automotive fields. Aluminum and aluminum alloys have low density (close to 2.7g/cm³), which is about 1/3 of iron or copper; good electrical and thermal conductivity, second only to silver, copper and gold; good corrosion resistance: the surface of aluminum is easy to naturally produce a dense and firm Al2O3 protective film, which can well protect the substrate from corrosion. Good products can be obtained through passivation, powder spraying, coating, etc., so it is particularly suitable for die-casting production. The composition of various standard aluminum alloy materials is similar, and alloy materials can be selected according to the use requirements. Conventional die-cast aluminum alloys have no special requirements for elongation and thermal conductivity, and are mainly used for automobile and motorcycle engine parts, such as engine covers, oil pans, cylinder blocks, transmission housings, etc. With the development of 5G technology, more and more die-cast aluminum alloys are used in communication base stations, mainly for the production of radiator housings. Since the thermal conductivity of traditional ADC12 aluminum alloy is only 100W/(m·K), ENAC44300 is generally selected as the die-casting material to improve the thermal conductivity of the parts; in addition, T5 heat treatment at 200~350℃ can be used. In addition to the 5G communication field, the photovoltaic industry also has an increasing demand for die-cast aluminum alloys, and the representative component is the inverter housing. "Photovoltaic + energy storage" has become the standard configuration for photovoltaic development in many countries. After matching energy storage, it will bring long-term and sustainable development momentum to photovoltaics. It is estimated that the global photovoltaic installed capacity will increase by 370GW in 2025, and the new demand for energy storage inverters will be about 74GW by then. Experts predict that by 2025, 2% of the world's energy supply will come from photovoltaic power generation. By 2055, photovoltaic power generation will deliver more energy, accounting for about 25% of the total energy supply, and will exceed 50% by 2150. In addition to the need for thermal conductivity, this type of aluminum alloy also has certain requirements ...

The standard parameter table of a die-casting machine usually includes various technical parameters and performance indicators, which can vary depending on the type of die-casting machine (cold chamber die-casting machine, hot chamber die-casting machine, etc.), the specifications of the die-casting machine, and the requirements of the manufacturer. The following are the standard parameters that a general die-casting machine may include: 1. Machine type: Cold chamber die-casting machine, hot chamber die-casting machine, etc. 2. Clamping force (closing force): Indicates the maximum force applied when the die-casting machine is clamped. Usually measured in tons (tons). 3. Injection force: Indicates the force applied by the injection system to push the metal or plastic material to fill the mold. Usually measured in tons (tons). 4. Injection weight (maximum): Indicates the maximum weight of metal or plastic used for one shot. 5. Injection speed: Indicates the speed at which the metal or plastic material enters the mold. Usually measured in millimeters per second (mm/s) or millimeters per second (inch/s). 6. Mold thickness (maximum/minimum): Indicates the maximum and minimum mold thickness that can be accommodated. 7. Mold opening and closing stroke: Indicates the maximum stroke of the mold during the opening and closing process. Usually in millimeters (mm) or inches (inches). 8. Cooling system: Includes cooling water or oil system, used to control the temperature of die casting mold. 9. Heating power: Refers to the power demand of heating unit or heating system. Usually in kilowatts (kW). 10. Control system: Involves the automation and control functions of die casting machine, including PLC controller and touch screen, etc. 11. Hydraulic system: The maximum working pressure of hydraulic system and the flow rate of hydraulic pump. 12. Operation mode: Manual, semi-automatic or fully automatic operation mode. 13. Safety device: Such as safety door, emergency stop button, protective cover and other safety facilities. 14. Dimensions: The overall size of die casting machine, including length, width, height, etc. 15. Weight: The weight of die casting machine, usually in kilograms (kg) or pounds (lb). These parameter tables can vary according to the specific die casting machine model and manufacturer, and are used to help users understand and select die casting equipment suitable for their production needs.

There are many types of casting defects, and the causes of defects are also very complicated. Therefore, when analyzing the causes of casting defects, we should start from the specific situation, conduct a comprehensive analysis based on the characteristics, location, process and sand used, and then take corresponding technical measures to prevent and eliminate defects. 1. Not pouring Prevention methods: Increase the pouring temperature, speed up the pouring speed, and prevent intermittent pouring; Increase the cross-sectional area of the runner and the inner runner; Adjust the post-furnace batching to appropriately increase the carbon and silicon content; Strengthen the exhaust in the casting mold, reduce the amount of coal powder and organic matter added in the sand; Increase the height of the upper sand box. 2. Not full Prevention methods: Correctly estimate the amount of molten iron in the ladle; For castings with narrow runners, appropriately slow down the pouring speed to ensure that the casting is full. 3. Damage Prevention methods: When cleaning and transporting castings, pay attention to avoid various forms of excessive collision and vibration, and avoid unreasonable dropping; When cleaning the drum, strictly follow the process regulations and requirements; Modify the size of the riser and the riser neck, make the riser neck knock section, and correctly grasp the direction of the pouring riser. 4. Sticky sand and rough surface Prevention methods: When the air permeability is sufficient, use finer raw sand and appropriately increase the compactness of the molding sand; Ensure a stable effective coal powder content in the molding sand; Strictly control the moisture content of the sand; Improve the pouring system, improve the pouring operation, and reduce the pouring temperature; Control the template baking temperature, which is generally equal to or slightly higher than the molding sand temperature. 5. Sand holes Prevention methods: Increase the sticky sand content in the molding sand, add new sand in time, and improve the surface strength of the molding sand; The mold finish should be high, and the draft angle and casting fillet should be reasonably made. Damaged molds should be repaired before assembling; Shorten the placement time of sand molds before pouring; Be careful when assembling or transporting molds to avoid damage or sand particles falling into the sand mold cavity; Remove floating sand in the mold before assembling and cover the gate. 6. Seam filling and sand expansion Prevention methods: Improve the compactness of the mold and avoid local looseness; Adjust the sand mixing process, control the water content, and improve the strength of the mold sand; Reduce the pressure head of the liquid metal and reduce the pouring speed. 7. Lifting the box Prevention methods: Increase the weight of the iron weight, and remove the iron weight after the molten iron solidifies; Lower the position of the ladle and reduce the pouring speed; Cor...

Motorcycle parts die casting machines have some characteristics that make them widely used in the manufacturing process of motorcycle parts. The following are the main features of motorcycle parts die casting machines: 1. Efficient production: Die casting machines are able to produce parts with complex shapes at high speed and high efficiency. For motorcycle parts, such as engine housings, brake parts, frame connectors, etc., this efficient production capacity is very important and can quickly meet market demand. 2. Precision and complex performance: Die casting technology can produce parts with high precision and stable dimensions, which is essential to ensure the accurate assembly and performance of motorcycle parts. Through die casting, complex shapes and fine structures can be formed in one piece, reducing assembly processes and improving product quality. 3. Wide selection of materials: Motorcycle parts are usually required to have good strength, wear resistance and light weight. Die casting machines can use a variety of metal alloys, such as aluminum alloys, magnesium alloys, zinc alloys, etc., to meet the specific requirements of different parts. 4. Save material costs: Die casting technology can effectively utilize materials, reduce waste and energy consumption, and thus reduce production costs. In the production of motorcycle parts, saving material costs is an important consideration. 5. Advantages of one-piece molding: Die casting can realize the one-piece molding of complex parts, reduce welding and assembly processes, and improve the overall strength and stability of the product. For motorcycle accessories, the advantages of one-piece molding can improve the safety and reliability of the entire vehicle. 6. High degree of automation and controllability: Modern die-casting machines are usually equipped with advanced automation control systems that can accurately control the parameters in the die-casting process to ensure the quality and stability of parts. This highly automated feature makes the production process more reliable and efficient. In summary, the motorcycle accessories die-casting machine has become an important process equipment in the manufacture of motorcycle accessories with its efficient production, precise and complex performance, wide range of material selection, and cost savings. It can meet the market demand for high-quality and high-performance accessories.

From July 10 to 12, 2024, Bengbu Longhua Die Casting Machine Co., Ltd. appeared at the Shanghai New International Expo Center and participated in the highly anticipated 18th Shanghai International Diecasting and Nonferrous Casting Exhibition (abbreviated as: Shanghai Diecasting Exhibition). The booth number is N3F52. At this exhibition, Bengbu Longhua Die Casting Machine Co., Ltd. not only demonstrated its strong strength in the field of die casting, but also launched a number of patented technologies developed in cooperation with the Chinese Academy of Sciences. The appearance of these innovative technologies undoubtedly brought a refreshing experience to the audience, fully demonstrating Longhua's profound accumulation and innovation capabilities in technology research and development. As an excellent domestic die-casting machine manufacturer, Longhua Company has always adhered to technological innovation and is committed to providing customers with efficient and reliable die-casting solutions. At this exhibition, Longhua Company focused on demonstrating the new die-casting technology developed in cooperation with the Chinese Academy of Sciences. The application of these technologies not only significantly improves the performance and stability of the die-casting machine, but also significantly reduces production costs and enhances the market competitiveness of the product. At booth N3F52, Longhua Company displayed a number of carefully developed die-casting machine equipment. These equipment not only have advanced intelligent control systems, but also adopt environmentally friendly and energy-saving design concepts. Their excellent performance and efficient production capacity have won the favor of many customers. Longhua Company has always adhered to the concept of "customer first" and is committed to providing customers with comprehensive service support. At this exhibition, Longhua Company set up a special customer service area to answer customer questions on site and provide technical consultation and solutions. At the same time, Longhua Company also demonstrated its complete after-sales service system to ensure that every customer can enjoy professional and timely technical support and services. Looking into the future, Bengbu Longhua Die Casting Machine Co., Ltd. will continue to strengthen cooperation with scientific research institutions such as the Chinese Academy of Sciences, continuously increase investment in technology research and development, and promote the continuous innovation and development of die-casting technology. Longhua Company will take this Shanghai Die Casting Exhibition as an opportunity to further expand domestic and foreign markets, create greater value for customers, and jointly promote the high-quality development of the die-casting industry. We look forward to working with you to move towards a more brilliant tomorrow! Welcome to booth N3F52 to learn more about new products and technology information of Bengbu...

Cold chamber die casting machines are mainly suitable for die casting of high melting point metals. These metals usually have high melting points and good fluidity, which are suitable for stable die casting process in cold chamber die casting machines. Generally speaking, cold chamber die casting machines can be used to die cast the following types of metals: Aluminum alloys: Aluminum is the most commonly used metal for cold chamber die casting machines. Aluminum alloys have low melting points, good fluidity and processing properties, and are suitable for efficient die casting production in cold chamber die casting machines. Common aluminum alloys include ADC12, A380, etc. Magnesium alloys: Magnesium alloys can also be die cast using cold chamber die casting machines in some specific applications due to their low density, high strength and good mechanical properties. Common magnesium alloys include AZ91D, etc. Copper alloys: Copper alloys usually have high melting points and poor fluidity, but some copper alloys such as brass and tin bronze can also be die cast on some special cold chamber die casting machines. Other high melting point alloys: Some alloys with high melting points, such as zinc alloys, can also be die cast in appropriate cold chamber die casting machines. The working principle of the cold chamber die casting machine is to heat the metal to melt in a separate melting chamber, and then fill the molten metal into the mold by pressure to form the part. Due to the characteristics of this type of machine, it is able to handle high melting point metals and maintain a stable operating temperature, making it suitable for die casting production of the above-mentioned types of metals.

Selecting the right crucible for your die casting machine is an important step to ensure an efficient die casting process and stable product quality. The following are the key factors in selecting a crucible: 1. Die casting materials and alloy types: The first thing to consider is the type of die casting materials and alloys you commonly use, such as aluminum alloys, zinc alloys, magnesium alloys, etc. Different materials have different melting points and melting characteristics, so you need to select the corresponding crucible to ensure that these alloys can be properly heated and insulated. 2. Crucible capacity and production needs: Choose a crucible with the appropriate capacity based on your production scale and the amount of metal liquid alloy required for each die casting operation. The capacity of the crucible should be able to meet your production batch size and frequency to ensure continuous production and efficiency. 3. Heating method and energy type: Crucibles are usually heated by resistance heating or gas heating. Choose a heating method that suits your factory's energy supply and ensures that it can provide stable and efficient heating capabilities. 4. Durability and material selection: The crucible needs to be resistant to high temperatures, wear and corrosion to withstand the high temperatures and erosion of metal liquid alloys in die casting operations. Selecting crucibles made of high-quality materials and refractory materials can extend service life and reduce maintenance costs. 5. Control system and automation capabilities: Modern crucibles are usually equipped with advanced temperature and pressure control systems to ensure that metal alloys maintain stable process parameters throughout the heating and insulation process. Some crucibles also have automated control and data acquisition functions, which help improve the control and consistency of the production process. 6. Safety and environmental considerations: Ensure that the selected crucible meets safety standards and considers its impact on the environment. Some crucible designs include exhaust gas treatment systems to reduce negative impacts on the environment and ensure the safety of operators. 7. Cost-effectiveness and comprehensive considerations: Finally, choose the appropriate crucible based on budget and funding constraints. Consider the purchase cost, operating cost and maintenance cost to ensure that the investment can achieve long-term benefits and production advantages. Taking the above factors into consideration, choosing a crucible suitable for a specific die casting process and production needs is one of the key factors to ensure die casting production efficiency and product quality. It is recommended to have a detailed discussion and evaluation with the die casting equipment manufacturer or an experienced engineer to obtain professional advice and support.