Today, let’s talk about how to shut down a large blow molding machine during a power outage or abnormal accident during normal production.
Hollow blow molding is a method of inflating a hot melt parison closed in a mold to form a hollow product by means of gas pressure. It is one of the most commonly used plastic processing methods, and it is also a rapidly developing plastic molding method. The mold used for blow molding is only a female mold. Compared with injection molding, the equipment cost is lower, the adaptability is stronger, and the moldability is good, such as low stress, and can mold products with complex undulating curve shapes.
Extrusion blow molding machine is a combination of the extruder, blow molding machine and mold clamping mechanism, which is composed of extruder, parison die, inflation device, mold clamping mechanism, parison thickness control system, and the transmission mechanism. The parison die is one of the important components that determine the quality of blow-molded products, and there are usually side-feed die and middle-feed die. The storage cylinder type billet die is often used for blow molding of large products. The storage tank has a minimum volume of 1kg and a maximum volume of 240kg. The parison thickness control device is used to control the wall thickness of the parison. The control points can reach up to 128 points, generally 20 to 30 points.
In the normal production process, there are often sudden power failures or emergencies. At this time, the operator must not panic, first press the emergency stop button and make an emergency brake. Then analyze the causes based on the on-site situation and find the problem to be solved quickly.
When the machine stops abnormally, do not put any part of the operator’s body into the machine to prevent the manipulator from hurting people. If the machine has abnormal noise, it can be observed after slowing down; when the blow molding machine is repaired, press the fault repair button on the screen to ensure safe repair. If you need to manually observe the action of each cavity individually, please pay attention to the position of the manipulator. At the same time, you must be clear about the function of the separate button before you operate it; make sure that the misoperation causes unnecessary trouble.
After the blow molding machine is repaired, tools and screws must be cleaned to avoid leaving them in the machine and affecting the normal operation of the machine. It is necessary to check whether the main reducer and the heating reducer are short of oil; the main engine bearing can be added once every 3 months. Check whether the moving parts are firm, whether the screws are loose or fall off, especially whether the transmission part is abnormal in the place with strong impact; check whether the pneumatic components are leaking and whether the action is sensitive. Check whether the triple valve body is abnormally leaking, whether it is blocked, whether the water cup is too full; if the solenoid valve of the blow molding machine is abnormal, it must be cleaned in time; the blow mold must be cleaned regularly. When opening the high and low-pressure air source switch, you must act slowly to prevent the airflow from being too fast and dirt will be blown into the solenoid valve. At the same time, open the exhaust valve for 30 seconds to ensure clean air.
After the machine is repaired, you must make sure that the mechanical parts are in good condition and there are no foreign objects when restarting. Especially the operating position, so as not to hurt people, and close the safety door at the same time; when starting the machine, the heating machine must be started first to prevent voltage fluctuations. Before starting heating, make sure that the cooling water is turned on. Check whether the high-pressure air source, low-pressure air source, power supply, water source, and various components are normal; when the machine is running, pay close attention to whether the machine has abnormal noise, and make early detection and stop it in time.