The return spring of the reversing valve of the hydraulic press not only has insufficient elasticity, but also has a skew phenomenon, causing the spool of the reversing valve to fail to return to its original position after a power outage. Therefore, the opening of the slide valve is too small, which throttles the oil passing through the reversing valve. The initial movement of the hydraulic cylinder is slow. When the temperature is low, the viscosity of the hydraulic oil is relatively high and the mobility is poor, resulting in the slow movement of the hydraulic cylinder. If the outside temperature is really too low, you can use a heater or corresponding insulation measures to increase the oil temperature at startup. The contamination of the oil should be checked; check whether dirt or colloid deposits are blocking the valve core or valve hole, and check the wear of the valve body. The throttling resistance in the control pipeline may be too large, the flow valve is improperly adjusted, the control pressure is inappropriate, and the pressure source is interfered with. The control pressure of the hydraulic system of the hydraulic press is too low. The piston rod of the hydraulic press is stuck with the cylinder or the hydraulic cylinder is blocked. The way to cover it is to promptly replace the hydraulic oil with better viscosity and temperature resistance. If the outside temperature

You can use the following methods to determine whether the oil filter of the oil press is blocked: 1. Observe the appearance of the oil filter: Check the oil filter housing. If there is obvious accumulation of sludge and dirt, or there is obvious oil stain attachment in the inlet and outlet pipelines of the oil filter, it may imply that the oil filter is blocked. In addition, some oil filters have clogged indicators that indicate that the oil filter is clogged when the indicator shows a red or a warning sign pops up. 2. Feel the oil temperature change: blockage of the oil filter will cause the oil to flow poorly, causing the system to heat up and the oil temperature to rise. Therefore, if it is found that the oil temperature rises faster than usual during normal operation of the oil press, or the oil temperature is significantly higher, consider whether the oil filter is blocked. However, the increase in oil temperature may also be caused by other reasons, such as cooling system failure, and comprehensive judgment is required. 3. Check system pressure: Blockage of the oil filter will increase oil flow resistance, resulting in system pressure drop or instability. If the hydraulic press is working

On July 9, 2025, Zhongshan Wanda Machinery Automation Technology Co., Ltd. ushered in a milestone moment—the top-up ceremony for building 5 of the new factory was grandly held.

The damage to the hydraulic valve parts during daily production and use of hydraulic presses is usually caused by the following reasons: 1. Deformation of physical structures due to long-term fatigue and overload. When the stress during work and external load stress during use exceed the yield strength of the part material, physical deformation of the external structure occurs, especially the bending deformation of the valve core of the overflow valve and the spring deformation, the reciprocating operation is inflexible, resulting in unstable system pressure or slow state transition process. 2. The valve core and valve body are seriously worn, and the gap is too large. The valve core and valve body (shelves), etc. are constantly friction during movement and use, causing changes in the size, shape and surface quality of the parts to change, and the quality is reduced and the effect is ineffective. The solenoid reversing valve core is worn and deformed, causing the valve to leak internally, resulting in reduced efficiency or unstable pressure, causing the system to not work normally. 3. The oil is not clean and causes the hairpin to wear, which will cause the hydraulic valve parts to not work normally, and may even cause hydraulic pressure.

From May 26 to 29, 2025, the Russian International Industrial Machinery Manufacturing Exhibition was grandly held in Moscow. As an important event in the global industrial field, this exhibition attracted many companies from all over the world to participate in the exhibition, jointly displaying the latest technologies and products of the industry. At this exhibition, Zhongshan Wanda Machinery Automation Technology Co., Ltd. (booth number: 12B45) was favored by many professional audiences with its advanced high-end hydraulic press products. After more than 30 years of unremitting efforts and innovation, Zhongshan Wanda Machinery Automation Technology Co., Ltd. has accumulated rich experience in the production, design and research and development of high-end hydraulic presses. The company's design and production capacity has reached the 50,000T level, and can provide customers around the world with a variety of high-performance hydraulic press solutions. At this exhibition, Wanda Machinery showed off many

2024 Chongqing Lijia Intelligent Equipment Exhibition