1. Power drive: after the motor is started, it drives the oil pump to run, and the oil pump extracts hydraulic oil from the tank and transmits the oil to each hydraulic cylinder through the hydraulic oil pipe.
2. Compression process: the hydraulic oil enters the compression cylinder and pushes the piston rod to do lateral movement, thus generating a strong pressure and gradually compressing the plastic bottles located in the waste steel material box. During the compression process, the plastic bottles are squeezed into tight packages.
3. Bundling and discharging: when the bale reaches the set size or density, the compression cylinder stops working, and then the bundling device starts, using steel wire, plastic tape, etc. to bundle and fix the bale.
4. After completing the bundling, the discharging device pushes the bale out of the baler for subsequent transportation and storage.
Structural Composition：
1. Mechanical system
Frame: usually adopts all-steel welded structure with high strength and stability, capable of withstanding the great pressure during the baling process, while supporting and fixing other components.
Compression chamber: It is the compression space for plastic bottles, and its size varies according to different models of balers. The inner wall of the compression chamber is usually specially treated with high abrasion resistance and smoothness to reduce the friction between the plastic bottles and the wall of the chamber to ensure the compression effect.
Pressure plate: connected to the piston rod of the compression cylinder, driven by the hydraulic system, the pressure plate in the compression chamber to do reciprocating movement, the plastic bottles for extrusion. The surface of the pressure plate is usually designed with non-slip lines or bumps to increase the friction with the plastic bottles and improve the compression efficiency.
Discharging device: common discharging methods include turning over the bag, pushing the bag (side and front push) or manually picking up the bag and so on. Bale overturning type discharging by turning over the side of the compression chamber to pour out the bale; push bale type is the use of cylinders to push out the bale from the compression chamber; manual bale picking method is generally applicable to small balers, by the operator directly from the compression chamber to take out the bale.
2. hydraulic system
Oil pump: is the power source of the hydraulic system, the mechanical energy of the motor into the hydraulic oil pressure energy, to provide power for various hydraulic components of
Plastic Bottle Baler . According to the power and pressure requirements of the baler, the model and specifications of the oil pump are different.
Cylinders: including compression cylinders, lifting cylinders (if there is a lifting function) and so on. The compression cylinder is the key component to realize the compression of plastic bottles, and the pressure is generated through the expansion and contraction of the cylinder; the lifting cylinder is used to adjust the height of certain parts of the baler, such as the position of the inlet or outlet, to adapt to different working scenes and material conveying requirements.
Hydraulic valve: used to control the flow direction, pressure and flow of hydraulic oil. For example, the directional valve can change the flow direction of hydraulic oil, thus controlling the expansion and contraction of the cylinder; the relief valve is used to limit the maximum pressure of the system to prevent the system from being overloaded; and the throttle valve can regulate the flow rate of the hydraulic oil, thus controlling the cylinder's movement speed.
Oil tank: the container for storing hydraulic oil, and at the same time play the role of heat dissipation, precipitation of impurities and separation of air in the oil. The capacity of the tank according to the working requirements of the baler and the size of the hydraulic system to determine the general need to ensure that the hydraulic oil in the system can circulate the flow, and to meet the requirements of a certain amount of working time.
3. Control system
PLC controller: it is the core of the baler control system, which can accurately control each component according to the preset program and logic. For example, it can control the start and stop of the oil pump, the movement speed and stroke of the oil cylinder, and the working timing of the strapping device, etc. PLC can also realize the function of fault diagnosis and alarm, so that when the system is abnormal, it can send out an alarm and display the fault information in time, which is convenient for the maintenance personnel to carry out troubleshooting and repair.
Operation interface: usually a touch screen or button control panel, the operator through the operation interface to enter a variety of parameters and commands, such as compression pressure, baling length, strapping mode, etc. The operator can also display the baler's operating time. The operation interface can also display the working status of the baler, operating parameters and fault information, which is convenient for the operator to monitor the operation of the equipment in real time.
Sensors: including pressure sensors, position sensors and so on. Pressure sensor is used to monitor the pressure of the hydraulic system, when the pressure reaches the set value, it sends a signal to PLC to control the compression cylinder to stop working; Position sensor is used to detect the position of the pressure plate, discharging device and other components to ensure that they are in the right position to perform the corresponding action, to ensure the accuracy and safety of the baling process.
4. Feeding system
Conveyor Belt: The common way of feeding is to use a conveyor belt to convey the plastic bottles to the feeding port of the
Hydraulic Baler. There are various types of conveyor belts, such as chain plate type and belt type, which have the functions of large conveying capacity, abrasion resistance, strong load capacity and anti-slippage, etc. The speed of the conveyor belt can be adjusted according to the speed of the baler. The speed of the conveyor belt can be adjusted according to the working efficiency of the baler to ensure that the plastic bottles can enter the compression chamber evenly and stably.
Filling hopper: Located at the end of the conveyor belt, it is used to temporarily store the plastic bottles to be packed. The size and shape of the hopper are well-designed to ensure that the plastic bottles enter the conveyor belt smoothly, and to avoid blockage or accumulation of plastic bottles in the process of feeding. Some of the hoppers can also be equipped with automatic spraying device and disperser, which can clean or sterilize the plastic bottles, while the disperser is used to break up the plastic bottles that are clumped or entangled together, which is convenient for the subsequent compression and packing.
