The printing materials of metal printing mainly include tin plate, chrome plate and aluminum plate, which also causes the challenges it faces in the production process far more than paper and plastic printing – in addition to the time-consuming machine setup, each iron sheet also needs to flow through There are multiple production processes such as internal coating, primer coating, printing, glazing and drying, and the processing and production efficiency requirements involved in each production process are not low, and the circulation time must be short…, where This has kept quality control costs high for a long time.
The coating and printing visual inspection solution that metal printing and coating companies dream of has the following characteristics.
Precise positioning of defect proofs Coating and drying often require at least 2 or 3 processes. How to ensure that defects can be accurately found in each process, large defects can be accurately located and removed, so as to ensure that there will be no material waste and subsequent Process processing waste.
Eliminate false defects In the coating and printing process, due to the difference in the weight of the metal sheet and the transmission speed of the conveyor belt, it is easy to twist the angle of the large sheet, resulting in false detections (ie false defects) in many vision systems. If the effects of torsional movement of this material can be ignored, the accuracy and efficiency of defect detection will be greatly improved.
Online measurement of edge size The size measurement of coating edge and material edge is mostly done by sampling offline proofs. How to achieve 100% online measurement of size for all large sheets of coating, so as to achieve welding without affecting efficient production. There are zero defects in the welding position during the process.
Reduced makeready time Many printing plants use a complex modeling process when using a print inspection system. Therefore, if it is possible to automatically retrieve the production work order information and use the electronic PDF document to perform the first version verification, the printing preparation time can be reduced, and the production efficiency and utilization rate of the printing machine can be improved.
Other surprises In addition, users (iron printing factories) have more expectations for the metal printing and coating inspection system: how to adapt the light source and camera of the inspection system to the surface of metal sheets, a substrate that is very different from paper and plastic; how to adapt the inspection system to Connect with production and quality systems such as MIS, accurately transmit production order information, and feed back quality information to allow managers to make correct decisions; how to accurately decompose large pieces of iron with partial defects into usable small pieces of iron to minimize quality costs.