The waste paper baler is a packaging device that integrates multiple functions into one unit,capable of producing packages with similar shapes,sizes,dimensions,and specifications.This effectively reduces the costs associated with transportation and storage while also meeting the requirements for transport using containers.During its operation,the waste paper baler generates considerable pressure.Currently,the balers widely used in enterprises have a high degree of automation; aside from the feeding process,all other actions can be controlled by a program,resulting in high rigidity.The range of materials that can be processed is quite extensive.The compression chamber of this machinery can be designed as a drawer-type box structure,allowing for the processing and packaging of various large shells such as car covers or insulation furnaces.The products processed by the waste paper baler are of high quality and economically beneficial,featuring a smooth appearance,consistent specifications,and high density.It offers higher reliability and more convenient maintenance.Waste paper can generally be classified according to its source and the type of fiber it contains,though there are significant differences in the types and standards of waste paper across different regions.Currently,the waste paper used in China's paper industry can be divided into two main categories:domestic waste paper and imported waste paper.Domestic waste paper primarily includes old corrugated boxes,books,magazines,old newspapers,scrap from paper mills,and various mixed waste papers.There is no unified quality standard for domestic waste paper in China yet.Another category is imported waste paper,mainly from the United States,Europe,Japan,and some coastal paper mills in South China that use waste paper from Hong Kong.The functions of the waste paper baler's pressure maintaining circuit are diverse.The purpose of the pressure maintaining circuit is to preserve a specified pressure during a certain phase of the hydraulic system's work cycle.Due to varying pressure levels and durations required for pressure maintenance,the forms of the pressure maintaining circuits are manifold.A pressure maintaining circuit using an accumulator operates with one oil pump for both the feed and clamping circuits.When the feed hydraulic cylinder moves rapidly,the pressure in the clamping cylinder must not drop,ensuring the workpiece is securely clamped.When the clamping cylinder moves rapidly,causing a drop in pump pressure,the check valve closes due to the pressure in the clamping cylinder,separating the feed and clamping circuits.The accumulator then supplements leakage to maintain the pressure in the clamping cylinder.Using the waste paper baler's hydraulic control check valve and electrical contact pressure gauge for pressure maintenance.When the pressure in the upper chamber of the cylinder drops due to leakage or other reasons to the set value of the lower contact on the electrical contact pressure gauge,the gauge sends a signal,positioning the valve to the right and supplying oil to the upper chamber of the cylinder.

When the pressure rises back to the set pressure of the upper contact on the electrical contact pressure gauge,the gauge sends another signal,placing the valve in the neutral position.The pressure in the upper chamber of the cylinder is maintained by the hydraulic control check valve 7,and the pump is unloaded through the M-type valve's neutral position.From the above introduction,we understand that waste paper balers are versatile,commonly used,and applicable in various industries,enhancing their importance within the sector.Waste paper baler is a device used to compress waste paper and similar products to reduce volume and facilitate transportation and recycling.