Leak Machine Testing for a Blow-Molded Component Using Programmable Logic Controller

A product must first undergo quality assurance in the highly competitive market of today. Leak testing is one of the most crucial steps when analyzing a product's quality, and thanks to automation and the Fourth Industrial Revolution, the process is now more dependable, accurate, efficient, and timesaving. The already existing leak testing methods are broadly classified as dry leak test and wet leak test, where dry leak test generally involves testing the components with high-pressure dry air, and the wet leak test involves testing the component with water or dyes. Most industrial leak testing machine uses an Ateq controller for the differential pressure method which is very costly. This idea is an enhanced combination of both dry and wet leak tests where the testing blow-molded component which is a fuel tank for TVS PREMIER will be tested using differential pressure change method and bubble leak test in the final stage of the process. The main idea of this work is to design a costeffective automation system to detect any leakage in a blow- molded component. Delta dvp28SVProgrammable Logic Controller (PLC), Delta HMI - DOP-B07S411Human Machine Interface (HMI), and pressure transducer are used for the approach. The testing has been done and the required experimental output has been verified.