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Bengbu Longhua Die‑Casting Machine Co., Ltd. has released key technical guidance on frequently‑overlooked faults during production with a horizontal cold‑chamber die‑casting machine, helping foundry operators avoid costly downtime and premature damage to core die‑casting equipment. Improper connection, misalignment and insufficient daily maintenance are major hidden risks that shorten the service life of large‑tonnage die‑casting machine components. Many workshop failures stem from the poor fit of injection‑related assemblies,the situation is as follows: 1.The injection plug rod, injection rod and molten‑cup bore must remain strictly co‑axial with zero‑loose connections.  2.Operators need to replace cushion blocks regularly, keep the ejector‑rod joint tight, ensure unobstructed cooling water and fully lubricate the injection head.  3.Bent ejector rods or misaligned injection heads and molten cups are forbidden during operation. Thousands of repeated injection shocks gradually compress the cushion‑block length, creating gaps at the split‑wrap‑clamp joint. Off‑axis operation will trigger a series of typical defects:  1.frequent bending and fracture of ejector rods; 2.stuck injection heads with short service life; 3.unilateral wear on injection‑head; 4.molten cup and gate sleeve; 5.aluminum splashing; 6.large flashing on material handles; 7.unstable casting quality; Most technicians misjudge these symptoms as poor injection‑head quality. Longhua provides two simple on‑site inspection methods for die‑casting machinery. Operators can measure circumferential clearance between injection rod and molten‑cup after manual injection, with 0.2 mm center deviation set as the tolerance limit. Repeated switching between injection and middle‑position can detect up‑and‑down runout, which signals rod deformation. Once misalignment occurs, factories should replace damaged parts, match cushion‑block gaps within 0.1 mm and carry out 24‑hour routine spot‑checks on clamp screws and joints. Different connection structures, including horseshoe‑floating connectors widely used on domestic die‑casting machine, demand enhanced daily maintenance to achieve stable long‑term production.

Introduction: before industrial robots brought vitality to the automobile industry, the application scope of industrial robot technology in the manufacturing industry in the world has become wider and wider. It has been extended from traditional manufacturing industry to other manufacturing industries, and then to various non manufacturing industries, but the automobile industry is still the main application field of industrial robots. It is understood that% of industrial robots in the United States are used in automobile production; Used in the automotive industry worldwide. Before industrial robots brought vitality to the automotive industry, the application scope of industrial robot technology in the manufacturing industry has become wider and wider in the world. It has been extended from traditional manufacturing industry to other manufacturing industries, and then to various non manufacturing industries. However, the automotive industry is still the main application field of industrial robots. It is understood that% of industrial robots in the United States are used in automobile production; Industrial robots used in the automotive industry in the world have reached 37% of the total consumption, and industrial robots used in automotive parts account for about 24%. In China, the initial application of industrial robot is in automobile and construction machinery industry, mainly used for spraying and welding of automobile and construction machinery. At present, due to the backwardness of robot technology and R & D, industrial robots are mainly used in manufacturing and less in non manufacturing. According to statistics, in recent years, more than half of the industrial robots produced by domestic manufacturers are provided to the automotive industry. It can be seen that the development of automobile industry is one of the driving forces for the growth of industrial robots in China in recent years. At the same time, in the "notice on organizing and implementing the development of intelligent manufacturing equipment" issued by the national development and Reform Commission, the Ministry of finance, the Ministry of industry and information technology and other ministries and commissions, according to the current situation of the development of intelligent manufacturing equipment in China, the "special" will focus on supporting the research and development of intelligent complete sets of equipment and key intelligent components required in automobile manufacturing and other fields, In the near future, it will focus on promoting the application of industrial robots and key intelligent components, such as robot automobile welding automation production line related to automobile, digital workshop and intelligent logistics system. Among the new national major technical equipment projects with demand as the traction, process as the guide, emphasis on user participation and finally aiming at the industrialization and transformation results, there ar...

Introduction: save the release agent: the amount of robot spray and artificial spray release agent is the same. It saves more than half of the dosage of the release agent, and the spray position is more accurate than that of the traditional sprayer. It can improve the quality of the product. The copper tube sprays, because of the air pressure reason, the copper tube will be changed after a few hours, and it needs to be adjusted manually, while the robot fixed the spray. High accuracy and many stored programs: can the robot be right.  Save release agent: The dosage of the robot spray and the artificial spray release agent is the same, which saves more than half of the releasing agent dosage than the traditional sprayer The spray position is accurate: it can improve the quality of products. The copper tube sprays, because of the air pressure reason, the copper tube will be changed after a few hours, and it needs to be adjusted manually. Storage program: robot can store more than 99 spray programs for different molds, write programs, and then tune them out for use. Life expectancy: after 4 years of conventional sprayers, there are many problems, such as slideway and guideway wear, and the robot will live longer than 8 years under proper operation. Robot flexibility is high: the traditional sprayer can only spray, and when the robot changes the fixture, it can also be used for picking or other purposes. Program changes are simple: The robot has a hand-held programmer for easy operation.  The fault rate is low: the traditional sprayer will be repaired several times on average, but the robot will hardly fail at the correct operation.

Congratulations to our company for winning the certificate of the standing director unit of the Anhui Chamber of Commerce for Import and Export

The natural gas compressor is vital‑core industrial equipment for CNG fueling stations and gas‑transport projects. Running under high‑pressure and flammable‑risk conditions, it requires correct operation knowledge and periodic maintenance for safe production. The piston‑type natural gas compressor runs through a three‑step working cycle: suction, compression and exhaust. Driven by the motor, the crankshaft pushes the piston to move back‑and‑forth inside the cylinder. During suction, gas flows into the expanding cylinder chamber. While the piston moves rightwards, the sealed‑in natural gas is compressed and pressure rises. Once internal gas pressure exceeds exhaust‑pipe pressure, the exhaust valve opens to deliver high‑pressure gas, then the cycle repeats. Different from ordinary air compressors, this machine compresses high‑risk combustible gas such as methane and propane under heavy‑duty high‑pressure conditions, while regular compressors mostly handle low‑to‑medium‑pressure air. Compressed natural gas (CNG) can serve as clean fuel for natural gas vehicles (NGV). Routine maintenance falls into quarterly, semi‑annual and annual schedules. Quarterly tasks include cleaning venting systems, solenoid filters, carbon deposits on air‑valves and draining separators. Semi‑annual maintenance covers pressure‑gauge calibration, safety‑valve inspection, pipeline leak‑detection and electrical‑system testing. Annual service requires official safety‑valve inspection, coolant replacement and comprehensive check‑ups of hydraulic and limit components. Operators should follow the rule of prevention‑first maintenance. Timely, full‑coverage inspection helps extend equipment service life and avoid dangerous failures of your natural gas compressor.

Current situation of natural gas compressor industry The domestic natural gas compressor industry started relatively late and began to explore the new market of natural gas compressor at the end of last century. Natural gas compressor belongs to high-pressure ratio large industrial centrifugal compressor, while Shengu group occupies most of the domestic market share in the field of centrifugal compressor and basically monopolizes in the field of high-end technology, The annual total value of the domestic compressor market is less than 10 billion yuan, belonging to a small industry. The centrifugal compressor is a high-grade industrial customized product. Shangu group was the first three-line factory dispatched by Shengu group to support the construction. The two sides have made clear the main direction. Shangu group mainly focuses on axial compressors and occupies most of the domestic market share. Around 2015, due to the domestic adjustment of supply and demand structure, The axial flow machine market has shrunk seriously. Shangu group has vigorously developed the field of centrifuges and began to participate in the market competition of long-distance pipeline compressors. In the natural gas compressor industry, it is called long-distance pipeline compressor. It is a centrifuge with relatively standard design specifications, and the model needs to be fixed. It was first driven by PetroChina's west to east gas transmission project. At that time, China did not have a company capable of production. All imported compressors, American GE, German Siemens, etc. were used in the construction of the West first line and part of the west second line. The sky high price equipment was provided on-site guidance. Under the guidance of the State Council's localization, the compressor of Shengu long-distance pipeline officially entered the field of vision. Around 2011, the 20MW long-distance pipeline compressor of Shengu group was successfully commissioned, and then successfully entered the west to east gas transmission project, ensuring that the lifeline of the country is in its own hands. After the entry of Shengu group, the price of foreign units has shrunk significantly and the price has been reduced by more than half. So far, foreign units have basically lost their advantages in the domestic market competition and gradually withdrew from the Chinese market. Later, Sinopec also began to vigorously develop long-distance natural gas transportation. Sinopec's new Guangdong Zhejiang pipeline and China Russia natural gas pipeline project basically established the position of Shengu group as the core supplier of long-distance natural gas pipeline compressor for heart equipment. So far, the state of completely grasping China's destiny of high-end centrifugal compressor from abroad has ended. Shangu group participated in the supply of a long-distance pipeline compressor of Shangu group. It is said that the supply cycle is long, beyond t...

Precautions for oil used in hydraulic system of die casting machine The hydraulic system is the heart of the cold chamber die casting machine, and the hydraulic oil is the blood of the die casting machine. What problems should be paid attention to when using the hydraulic oil in the hydraulic system of the die casting machine? From two aspects: the first is the selection of hydraulic oil, and the second is the precautions for the use of hydraulic oil. 1、 Selection of hydraulic oil: For the die-casting machine, the quality of hydraulic oil directly affects the service life of the die-casting oil valve. The damage of any oil valve will affect the normal operation of the machine. If the oil selected at the beginning is inappropriate, the harm to the machine has already occurred, but it is not easy to find. In this way, it will be difficult to repair in the future. Therefore, the selection of hydraulic oil with appropriate variety and viscosity is the primary condition to ensure the normal operation of the system of automatic high precision die casting machine. 1. Selection of hydraulic oil varieties The variety selection of hydraulic oil is determined by the working environment and working conditions of hydraulic equipment. There are many kinds of hydraulic oil, including anti-wear hydraulic oil, anti combustion hydraulic oil, low pour point hydraulic oil, etc. Generally speaking, anti-wear hydraulic oil should be selected for the hydraulic system of aluminium alloy die casting machine. It is developed from anti rust and anti oxygen hydraulic oil. It not only has good anti rust and anti-oxidation, but also has more outstanding anti-wear performance and longer service life. 2. Selection of hydraulic oil viscosity When selecting hydraulic oil, it is important to select the appropriate viscosity grade. Temperature is the main reason affecting the viscosity of hydraulic oil. If the viscosity is too low, it will cause leakage and increase wear, resulting in the pressure of hydraulic system not meeting the standard, and the product quality does not meet the requirements. If the viscosity is too high, it will increase the suction resistance of the pump, easily produce cavitation, cause vibration and noise, reduce the response performance of the hydraulic system and reduce the action sensitivity. Generally, No. 46 hydraulic oil shall be selected in winter and No. 68 hydraulic oil shall be selected in summer. 3. Comprehensive technical and economic analysis of oil separation In the use of hydraulic oil, economy is an indispensable and important part. People often only pay attention to the price of oil products, ignoring the variety and quality of the selected oil. It is understood that the improper selection of oil products in the operation failure of hydraulic system is an important aspect. Therefore, in order to prolong the service life of oil products, save equipment maintenance costs, prolong the service life of hydraulic components and improve operation...

The selection of die casting machine is usually based on the clamping force, injection quantity and casting area. 1. Determine the clamping force of alloy die casting machine The clamping force is the first parameter to be determined when selecting the die casting machine. The function of mold locking force is mainly to overcome the mold expansion force in the mold cavity, lock the parting surface of the mold, prevent liquid metal splashing and ensure the dimensional accuracy of the casting. The die locking force of the automatic high precision die casting machine is calculated as follows: F=k × p × s F --- calculate clamping force K --- safety factor P --- injection specific pressure S -- projected area The safety factor K is related to the complexity of the casting and the die casting process. It is generally taken as 1-1.3. For thin-walled complex castings, the parting surface of the die is greatly impacted due to the high injection speed, injection specific pressure and die temperature. Therefore, K should be taken as the larger value, and vice versa. 2. Determine the injection quantity of the machine Injection quantity is an important parameter of intelligent die casting machine. It is the most permanent parameter when selecting the die casting machine, expressed in kilograms. Select a die casting machine with sufficient injection quantity - a die casting machine with injection quantity just equal to the blank weight of die casting parts shall not be selected. The usual choice is that the weight of die-casting blank should account for 25% - 85% of the injection volume. 3. determine the projected area of parts The projection area is an important parameter for die casting model selection. The projection area mentioned here is not only the area of parts, but also the area of garbage bin and nozzle. The area estimation is generally obtained by dividing the clamping force by the injection specific pressure during die casting. For the existing beer pieces, the calculation of casting area should be divided into small regular shapes. (1) calculation of s of circle area with diameter D: S= Л d2/4 (2) calculation of square area s with side length a: S = A2 (3) calculation of rectangular area s with length a and width B: S = ab (4) calculation of trapezoidal area s with upper bottom a, lower bottom B and height H: S = (a + b) H / 2