What are the common faults of vertical plastic injection molding machines

1、 Classification of Defects in Vertical Plastic Injection Molding Machines
There are four classification methods for plastic injection molding machine defects: according to the condition at which the defect occurred, according to the nature of the problem, according to the cause of the problem, and according to the danger of the problem.
According to the condition at which the problem occurs, it can be divided into gradual and sudden problems. Gradual problems are generally manifested as wear and corrosion of parts, while sudden problems are manifested as machine problems caused by external disturbance or improper operation.
According to the nature of the problem at the time of its occurrence, there are also two conditions: intermittent and persistent problems. Intermittent problems are caused by the loss of some function of a component due to wear and tear, which only requires debugging and repair; The persistent problem is the complete loss of function of the components, and production can only be resumed by replacing the components.
According to the cause of the problem, it can be divided into wear and tear problems and misuse problems. Wear and tear problems are literally caused by the wear and tear of components or tools, while misuse problems are caused by incorrect operation or lack of regular maintenance.
According to the danger generated by the problem, it can be divided into safety and danger problems. This type of illness is primarily determined by whether it causes damage to the human body.
Plastic injection molding machine
2、 Analysis of common faults in vertical plastic injection molding machines
There are many common problems with plastic injection molding machines. Here are several common problems that occur more frequently and their solutions. In the use of molds, the common problems with mold locking are unsuccessful mold locking and abnormal noise during mold opening and closing. When encountering situations where the mold is not locked, it is necessary to check whether there are foreign objects in the mold cavity. If there are any, they should be immediately removed. Secondly, check whether the hydraulic pressure is securely closed and whether the mechanical locking rod is in an open state; Check if the travel switch in front of the safety door is damaged and repair it in a timely manner. When encountering abnormal noise during mold opening and closing, it is necessary to check whether there is a shortage of lubricating oil, whether the locking force is too large, and whether the current parameters are normal.
During the glue injection process, the inability to spray and the unstable amount of glue injection are common problems. Failure to spray may be due to blockage of the nozzle or cracking of the dispensing nozzle; It is also possible that the glue injection valve is stuck or the glue injection piston rod is cracked, and the temperature of the material barrel is too low, which can also lead to the inability to inject glue. The unstable injection rate is mainly caused by the wear of the nozzle, material barrel, and oil cylinder oil seal.
In the operation of hydraulic systems, contamination and crawling problems of hydraulic oil are common. The main reason why hydraulic oil is contaminated is because it is mixed with air, water, and some impurities, which can be removed. Crawling problems are caused by damaged parts, inadequate lubrication, and air intrusion into the hydraulic system.
3、 How to reduce the occurrence of defects in vertical injection molding machines
How to reduce the occurrence of defects, in addition to paying attention to correct operation by workers, it is important to establish regular maintenance guidelines. Such maintenance requires different maintenance contents to be formulated on a daily, monthly, and annual basis. At the same time, a fault investigation and repair ledger should be established to facilitate the summary of defects and reduce the occurrence of defects.