The importance of four column hydraulic press auxiliary device

In the hydraulic system of four column hydraulic press, the selection of auxiliary device is also very important. Sometimes, because the selection of auxiliary device is not reasonable or the quality is not good, the system will produce oil leakage, vibration and noise, oil overheating, oil contains too much gas and various impurities, which will pollute the working environment, seriously damage the working ability of the hydraulic system, and even cause accidents. Therefore, the auxiliary device plays an important role in the high performance and high index hydraulic transmission system.

The four column hydraulic press has independent power mechanism and electrical system, and adopts the centralized control of button. The process action is controlled by relay. It can realize three operation modes: adjustment, manual operation and semi-automatic operation. The working pressure, pressing speed, no-load fast down and deceleration travel range can be adjusted according to the process requirements, and two working modes of constant pressure and fixed range molding can be completed. The constant pressure forming process has pressure holding, delay and automatic return action after pressing.

Four column hydraulic press is an important technical means to realize transmission and control. Hydraulic technology has been widely used in various fields of national economy. Four column hydraulic press is suitable for the pressing of various plastic materials. In the working process, the upper hydraulic cylinder drives the upper slide block to realize a series of action cycles of Express downward and slow pressure to the back position. The lower hydraulic cylinder drives the lower slider, and the action cycle is the same Ring.



In the hydraulic system of four column hydraulic press, when the three position four-way reversing valve is in the middle position, the oil path leading to the hydraulic cylinder is blocked, and the two chambers of the hydraulic cylinder communicate with each other and return the oil circuit. The hydraulic system design is not perfect, the selection does not match, the throttle channel is blocked when it is open, the internal and external leakage of the system is serious, excessive air enters into the oil, and the friction resistance changes, etc., which will cause the speed instability of the actuator at low speed, and even creep phenomenon.