DBCE Mechanical Students develop Prototype of Pneumatic Paper Stamping Machine

Paper stamping in all the offices, institution, banks, and post offices are done manually which is time consuming and laborious . The intensity of the stamp is not uniform. Final year Mechanica Engineering students, Aditya D’souza, Chrislee Dias, Jolton D’costa, Linford Dias and Nashlon D’souza under the guidance of Dr. Pravin Verekar have developed a prototype of an automated pneumatic paper stamping machine in which stamping is done by a small capacity pneumatic press.

The paper stamping is based on principle of metal stamping which is used in the industries. In this case, a rubber stamp is attached to a pneumatic actuator (cylinder) which is driven by stepper motors on an XY table. The envelopes along with the postal stamp are fed to the conveyor belt by friction rollers one after the other. Then the image is captured by a camera and sent to a computer where it is processed in LabVIEW software. In LabVIEW, a previously taken template image of the postal stamp is matched with the stamp on the envelop due to which the stepper motors are activated through a Microcontroller which moves the pneumatic cylinder above the stamp. Once the required position is attained, a solenoid valve gets activated which forces the piston out of the cylinder resulting in stamping action. A rubber stamp is attached to the pneumatic cylinder by a stamp holder. The machine is capable of stamping numerous amount of paper stamps in short amount of time