Preventive Maintenance of Corrugated Cardboard Production Line
Preventive Maintenance of Corrugated Cardboard Production Line
Carton enterprises attach great importance to the prevention and maintenance of corrugated cardboard production line. The goal of preventive maintenance of corrugated board production line is to prevent equipment failure. Preventive maintenance can protect and enhance the reliability of equipment by replacing worn parts before parts and equipment fail. Preventive maintenance activities include equipment inspection, overall or partial inspection within a specified period, oil replacement, lubrication, etc. In addition, the worker can record the wear and tear of the equipment in order to identify the parts that need to be replaced, repaired and worn out before the parts cause problems in the system. Recently, advances in testing and diagnostic tools technology have helped carton companies maintain equipment accurately and effectively.
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The Value of Preventive Maintenance
When it comes to preventive maintenance, there are many misunderstandings. One of them is that the cost of preventive maintenance is too high. According to this logic, the cost of preventive maintenance is higher than that of regular downtime and maintenance, that is, higher than that of maintenance after equipment failure. For some parts, that's true. However, it is not only costs that need to be compared, but also long-term profit gains and cost savings due to preventive maintenance. For example, without preventive maintenance, losses caused by unplanned outages may occur. In addition, preventive maintenance will save costs by improving the production efficiency during the use of equipment.
Long-term benefits of preventive maintenance
Improve system reliability:
Reduce the cost loss caused by replacement parts:
Reduce system downtime:
Parts inventory management is better:
In terms of long-term impact and cost comparison, preventive maintenance is more meaningful than routine maintenance when equipment fails.
When to carry out preventive maintenance
Preventive maintenance is meaningful only if and only if it meets the following two conditions:
Conditions 1: Increased failure rate of faulty components. In other words, the failure rate of components increases, which means wear and tear, and preventive maintenance of components. However, if the failure rate of a component is too high (expressed by exponential distribution), preventive maintenance is meaningless.
Conditions 2: The total cost of preventive maintenance activities is lower than the total cost of maintenance. Attention should be paid to the cost of maintenance, including visible and invisible costs, such as downtime loss, loss of production time, loss of credibility, etc.
If two conditions are met, preventive maintenance is meaningful. In addition, according to the cost ratio, the optimum time for preventive maintenance of individual parts can be calculated by computer.
Preventive maintenance requires attention to every part of each machine, and maintenance should be planned. Usually, it refers to a list provided by the machine manufacturer, which specifies all maintenance tasks and common troubleshooting problems. Each maintenance supervisor should organize and complete these tasks within a framework consistent with the plant's processes and plans. Sometimes, maintenance supervisors may judge tasks and plans differently from those of machine manufacturers.
The success or failure of equipment maintenance depends largely on the skills of maintenance supervisors. Therefore, a document database must be established for all these processes. That is to say, a computer program should be established to store all this information and guide the maintenance of the machine. To some extent, preventive maintenance work requires highly specialized and trained technicians to be competent. Electronic control is needed, especially by technicians. Maintenance supervisors are responsible for a lot of work. They should be properly trained and assigned tasks.
The equipment of corrugated carton production industry is not as complicated and difficult as that of other industries. A typical well-maintained processing equipment, in principle, as long as the use of high-quality raw materials: corrugated cardboard, printing plate, die-cutting machine die and ink can be processed day and night high-quality carton products. When the production deviates from the normal operation plan, the use of old carton equipment, damaged plates and dies will certainly lead to product quality problems. Old bearings, gears, rollers and other machinery are the root causes of the quality decline.
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