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  • Longhua energy-saving high-speed high-precision die-casting machine production benefit analysis
    2021-06-25

    Longhua energy-saving high-speed high-precision die-casting machine production benefit analysis

    Cost-effective nationwide: 1. Save electricity and reduce production costs: (Compared with Longhua 800T die-casting machine and 800T die-casting machine of other brands) Compared with other brands of die casting machines of the same model, the power saving rate reaches 50%-80%. "Die-casting machine energy-saving system benefit analysis table" is as follows: Note: The power saving rate is 50%, 15 kWh/hour, 30 days a month, 24 hours a day, 10800 kWh per month can be saved, 1 yuan per kWh means: 10800 kWh*1 yuan=10800 yuan/month* December = 129,600 yuan/year. 2. Price, configuration, performance, after-sales service: Remarks: Longhua Intelligent High Speed and High Precision Die Casting Machine Project, on November 24, 2019, at the 3rd China MEMS Intelligent Sensor Industry Development Conference, led by the Anhui Provincial Government and Bengbu Municipal Government, and jointly developed and produced with the Hefei Institute of Chinese Academy of Sciences , The project has been included in one of the four high-end manufacturing projects in Bengbu. At present, the project has won: 9 national invention patents, 2 high-tech products, 1 Anhui Province New Product Certificate, 4 Computer Software Certificates and other honors (Completely independent intellectual property rights). 3. Function of reducing oil temperature: In the actual production of Longhua Energy-saving high-speed and high-precision die-casting machine, the oil temperature can be reduced by about 8 degrees, hydraulic valves, hydraulic pumps, hydraulic valve plates, hydraulic plug-ins, hydraulic oil, hydraulic components, molds, injection chambers, injection heads and The life of the whole machine is 40% longer than that of other domestic brands of the same model. Reduce production costs by about 40%. 4. Improve the qualification rate of die-casting products: Longhua energy-saving hydraulic system (developed by the Hefei Institute of Chinese Academy of Sciences, has won nine national invention patents and 33 utility model patents), the whole machine energy-saving hydraulic system has a fully closed-loop design, the system pressure and flow control are more accurate, and the die-casting products are qualified The rate of die-casting products of other domestic brands can only reach about 70%. The 29% of the waste products need to be melted again, which wastes a lot of energy and consumables (crucible, injection chamber, injection The service life of heads, molds, etc.), production cycle and labor. 5. Improve the response speed and production efficiency of the die casting machine: Due to the fast response speed of the mold opening and closing pump station of the Longhua energy-saving hydraulic system (it has won nine national invention patents), the production efficiency is about 30% higher than that of other domestic brands of the same model die-casting machine. 6. Noise reduction: Longhua energy-saving hydraulic system reduces noise by more than 6 decibels compared with traditional motor ...
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  • Do you know the cycle of die casting molds?
    2021-06-18

    Do you know the cycle of die casting molds?

          Metal die-casting is an advanced technology with less and no cutting. It has the characteristics of high consumption efficiency, saving original materials, reducing consumption costs, good casting performance, and high precision. It is widely used. Among them, the largest market for die-casting castings is the automotive industry. As humans pay more and more attention to sustainable development and environmental maintenance, automotive lightweighting is the best way to achieve high efficiency, safety, energy saving, warmth and environmental protection.   Using aluminum alloy instead of traditional steel to make cars can reduce the weight of the whole car by about 30%. Because the die-casting mold is to die-cast molten metal at 400~1,6000C under high pressure (30~150MPa). During the molding process, the mold is periodically heated and cooled, and is scoured and corroded by hot metal sprayed at high speed.    Mold materials require high thermal fatigue resistance, thermal conductivity, and good wear resistance, corrosion resistance, and high temperature mechanical properties. It is still difficult to meet the ever-increasing performance requirements only by the application of mold materials. Various surface treatment technologies must be applied to the surface treatment of die-casting molds to meet the requirements for high efficiency, high precision and long life of die-casting molds.    Die-casting mold failure method When the die-casting mold is in contact with high-temperature liquid metal, it not only has a long time of heating, but also the heated temperature is higher than that of forging dies. The temperature of die-casting non-ferrous metals is 300~800℃, and the temperature of die-casting ferrous metals is above 1000℃. It also received a very high pressure of 30-150 MPa, and was subjected to wear and corrosion caused by repeated heating and cooling and high-speed scouring of liquid metal activities.
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  • Sales of new energy vehicles increasing sharply, and aluminum alloys usher in new opportunities
    2021-06-01

    Sales of new energy vehicles increasing sharply, and aluminum alloys usher in new opportunities

    Although new energy vehicles are not very mature in many aspects, their emergence has certain significance for energy saving, emission reduction, reduction of exhaust emissions, and environment protection. There will be greater development in the future, and new opportunities to the aluminum die casting machine industry.  In recent years, as the country has paid more and more attention to energy conservation and environmental protection, the new energy automobile industry has taken advantage of the trend under a series of policy subsidies. It has gradually become the darling of the market due to its advantages in safety and environmental protection. According to the data, before November of 2018, the sales of new energy vehicles increased by 68% year-on-year to 1.03 million units, breaking through the 1 million unit mark, which means that our country's new energy vehicle market has officially risen.aluminum die casting machine industry This is undoubtedly a new opportunity for the aluminum industry, indicating that aluminum alloys still have greater improvement in the new energy vehicle market. Aluminum alloy has low density, light weight, corrosion resistance, excellent plasticity, and high strength. It is the preferred lightweight material for new energy vehicles. It is mainly used in car bodies, panels, engines, chassis, suspensions, wheels, heat exchangers, batteries, etc. . With the increasing research of aluminum alloy in new energy vehicles, the application of aluminum alloy will be further expanded.aluminum die casting machine industry Facing such great business opportunities in new energy vehicles, the aluminum profile industry should pay more attention. First of all, it is necessary to clarify the problems that aluminum alloys will encounter in the lightweight application of new energy vehicles. At present, aluminum alloy processing requires more complicated technology compared with steel processing. Therefore, the difficulty of processing is a problem faced by many workers. Failure to process can easily affect the overall safety and stability of new energy vehicles.
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  • Eid Mubarak to all Muslim friends!
    2021-05-14

    Eid Mubarak to all Muslim friends!

    Eid Mubarak to all Muslim friends!  عيد سعيد عيد مبارك  السلام عليكم ورحمة الله وبركاته،  تقبل الله صيامكم واعمال الصالحين و عيد سعيد وعمر بالخير  وكل عام وانتم والاسرة الكريمة بخير  开斋节吉庆!恭祝各位身体安康!家庭和睦!万事顺遂!
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  • Bengbu Longhua warmly congratulates the successful opening of the 2021 China (Anhui) Science and Technology Innovation Achievement Transformation Fair!
    2021-05-06

    Bengbu Longhua warmly congratulates the successful opening of the 2021 China (Anhui) Science and Technology Innovation Achievement Transformation Fair!

    On the morning of April 26, the opening ceremony of the 2021 China (Anhui) Technology Innovation Achievement Transformation Fair was held in the Anhui Innovation Hall. Zhang Qingli, vice chairman of the National Committee of the Chinese People's Political Consultative Conference, delivered a speech and announced the opening of the fair. With the theme of "Consolidating the Foundation of Innovation and Accelerating the Transformation of Scientific and Technological Achievements", this session of the Science and Technology Fair is co-sponsored by the Ministry of Science and Technology of China, the Chinese Academy of Sciences, and the Anhui Provincial People's Government.  Li Jinbin, Secretary of the Anhui Provincial Party Committee and Director of the Standing Committee of the Provincial People's Congress, delivered a speech. To Li Jinbin, Secretary of the Anhui Provincial Party Committee and Director of the Standing Committee of the Provincial People's Congress, delivered a speech. He said that Anhui Province should implement the "national policy" of innovation, creating both a technological peak and a technological plateau. "With Hefei as the core, Wuhu and Bengbu as the two wings, and other cities as the main points, we will speed up the construction of the'five one'. The upgraded version of the main innovation platform and the sub-platforms of'One City, One Center' form a provincial innovation matrix featuring each individual's strengths and benign interaction." Wang Qingxian, Governor of Anhui Province, presided over the opening ceremony of the China (Anhui) Science Fair. To Xu Nanping, Deputy Minister of Science and Technology, delivered a speech. Xu Nanping, Vice Minister of the Ministry of Science and Technology, said in his speech that China (Anhui) Science and Technology Fair will allow more “flowers” of science and technology to produce “fruits” of the industry, and provide solid strategic support for serving and boosting the high-quality development of Anhui and the whole country. Zhang Tao, Vice President of Chinese Academy of Sciences, delivered a speech. In his speech, Zhang Tao, vice president of the Chinese Academy of Sciences, said that at this session of the Science Fair, the Chinese Academy of Sciences will release more than 100 achievement projects, display more than 70 items, and release 5 key projects. "I hope that both parties will take this fair as an opportunity. , Actively docking, and constantly expanding the scope and depth of cooperation. Further focus on the layout and needs of major industries in Anhui Province, actively promote the transformation of high-quality scientific research results of the Chinese Academy of Sciences, form new technologies, create new production capacity, create new business formats, and drive the rapid development of local industries To achieve mutual benefit and win-win results." Li Jinbin, Secretary of the Anhui Provincial Party Committee, kicked the gong for the Anhui Science and Te...
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  • About the treatment of products yellowing and blackening (Internet download)
    April 14,2021.

    About the treatment of products yellowing and blackening (Internet download)

    All the time, the aluminum alloy die casting cleaning is always a difficult problem. The practice of many enterprises is, after machining, do not do thorough cleaning, just use water to simply rinse, then blow dry, or even natural air dry, and then stacked in the warehouse for a few months.Suddenly one day need to be out of the warehouse, only to find the work piece long mildew spot, moldy, black, yellow situation. At this time, we suggest you: 1, with die-casting aluminum mildew spot cleaning agent timely and thoroughly clean, including the surface of the work piece oil, slight oxidation mildew point (mildew point is still very small, do not look carefully, the naked eye can not really see); 2, after cleaning, immediately do an anti-oxidation treatment. It should be noted that currently chromic acid has been banned, the use of chromium and cyanogen free passivant to meet the environmental requirements; 3. After anti-oxidation drying, the workpiece shall be placed in a dry and ventilated place and inspected regularly. 二、Fragile workpiece Item Replacement time Remark Ejection rod At any time Deformation, fracture, fluff, abnormal sound Cast pin At any time Deformation, fracture Irregularly shaped insert At any time Deformation, fracture Seal ring At any time Leaks, breaks, expiration date Rubber tube At any time Leaks, breaks, expiration date   Replacement time 1、Vulnerable workpiece according to the mold production product strain, deformation, fracture, uneven or mold production abnormal sound failure, please replace at any time 2、If it is damaged during assembly or production, please replace the required workpiece at any time.
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  • About the processing of flying material and adhesive mold on parting surface of mold
    April 14,2021.

    About the processing of flying material and adhesive mold on parting surface of mold

    The mold is composed of moving mold and fixed mold. Parting surface refers to the part that can be contacted when the two are closed.According to the requirements of mold production, the parting surface of the moving and fixed mold core should be 0.15-0.35mm higher than the parting surface of the mold frame (mold frame) to prevent the parting surface from flying materials. 1.It is generally more machine problems that new mold parting surface large area and local parts of the problem of flying material a.Clamping force is small and not locked in place.(empty lock for many times, check the locking strength) b.Is the supercharging pressure too high?Is the trip too short? c.Whether the holding time is too short. d.Is it too warm? (normal position 660° ~ 680°) e.Check die casting machine for wear of curved core (curved arm) or bushing.Is the gap too large? f.Whether the machine wall is balanced 2.The mold will also have problems. a.The mold is not in place. (apply red powder to the smooth and easy to check parting surface of the moving mold core, and (generally apply it to the parting surface of the mold core) after the mold locking, check whether the red powder traces of the parting material surface not applied reach the production requirements of 95% or more. b.Die core exhaust location smaller, shorter or deeper (-0.15mm or more), easy to fly 3.Mass production (more than 25,000 times) of mold parting surface flying material (old mold) a.Check whether the flying material position of parting surface is collapsed, the exhaust groove is too deep or there are foreign matters, such as aluminum slag is not cleaned, so that the mold can not close in place to produce flying material. b.Check whether the height of mold frame (mold frame) and mold core parting surface is in place. The normal closing die is: the upper and lower parting surface of the die core meets each other, and the upper and lower parting surface of the die frame has a gap of 0.3-0.7mm. Long time production products mold deformation, die box around the edge of the upper and lower parting surface hit dead or obviously adhere to foreign bodies, so that the mold core upper and lower parting surface can not touch, can not match to the effective position, resulting in the gap will have flying edge, flying phenomenon.
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  • Use of mold cooling system
    April 14,2021.

    Use of mold cooling system

    1.When used correctly, the cooling system can prolong the service life of the mold and improve its production efficiency.In the actual production we often ignore its importance, production operators in order to save time, also do not go to the cooling water pipe.Some companies even in order to save the cost of custom mold even do not need cooling water, resulting in a very serious shutdown.The material of the mold is generally special mold steel, is made after a variety of processing.But even the best materials have their limits.If the mold temperature is too high in the production, it is easy to make the mold core surface early turtle crack, some molds have not even produced more than 2000 mold cracks on a large area.Even in the production of the mold, because the mold temperature is too high, the mold core has changed color, and even reached more than 400 degrees after the measurement, such a high temperature and spray release agent chilling will make the mold large area cracking or serious cracking, casting is easy to deformation, strain, adhesion or scrap. 2.Under the condition of using cooling water system (water or oil), the mould can greatly reduce the dosage of release agent and shorten the long spraying process.Its advantage is to save the die casting production cycle, improve the quality of products, reduce production stop-production failure and die damage events caused by mold cracking or casting strain, aluminum sticking and mold sticking.It also reduces the loss of ejector rod, casting pin and mold core caused by the overheated mold temperature, and effectively prolongs the production life and production quantity of the mold. 3.Pay special attention to the use of cooling water system caused by the cooling pipe blockage, to check frequently.
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