The machine vision inspection system can complete the last procedure of mask defect detection and improve the quality and production speed of mask products. In this process, the industrial camera can accurately and quickly capture the most real image data. Combined with the back-end analysis software, it can help the production line personnel make the most efficient judgment in the shortest time, and truly reduce the labor cost and the probability of mask contamination in the process.
Inspection process of mask defect detection and screening system:
Central motion system: it is composed of motor, spindle, glass plate and related accessories to realize the stable rotation of the central system.
Visual inspection system: it is composed of 6 cameras and corresponding light sources, which can take pictures on the upper surface, lower surface and side ring surface of materials respectively.
Software analysis control system: after the camera takes the image, through the host software analysis, determine the properties of the tested materials: qualified, unqualified and to be inspected.
Material distribution and inspection system: after the software determines the properties of materials, through the PLC electrical control system, the system classifies and discharges the good products, defective products and products to be inspected according to the attributes of the software indicators.
PLC electrical control system: complete the control action of the whole set of equipment through PLC with visual inspection software.
In the production process, there will be ear rope falling off, asymmetric teeth arrangement, stains, damage and other defects, which seriously affect the quality of the mask, reduce the performance of the mask or can not be used. It is difficult to detect the quality of products accurately and stably by human eye measurement. The machine vision inspection system mainly aims at the following contents to carry on the omni-directional inspection to the mask.
After slicing, the mask was detected
The length and width of the mask should be tested;
The size of the mask slice;
The number of creases is the same.
Inspection after welding of ear band:
The length of ear band was measured;
Ear band welding inspection;
Detection of hemming length.
Inspection before mask packaging:
Product type identification;
Surface defect detection;
Identification of surface production batch number;
Product color identification.
Complete inspection of mask packaging:
Check whether the package is qualified;
The number of masks was calculated.
The combination of visual inspection system and automatic production equipment can effectively help mask manufacturers to check the quality of products. Machine vision inspection system provides high-speed, high accuracy, and long-term and stable repetitive work. Compared with manual detection, it can greatly reduce the error rate, avoid the weakness of human eye detection elasticity fatigue, and improve product quality and production speed.