ELECTRONIC SYSTEM FOR TESTING TENSILE STRENGTH OF FOUNDRY SAND

Abstract

Foundry shop is an important section in industries. In foundry manufacturing of major pieces is done, which supplies to another industries such as automotive, naval, aeronautic, weapon and agricultural industries. Many of these pieces play key roles in final product as these are used in automotive engine, aero plane components or wind energy castings. Sand is the principal moulding material in the foundry as it is using for all types of castings. This machine designs an idea of testing tensile strength of sand which is using for castings in foundries with the help of load cell. This system defines the sand whether it is good or bad for castings. We cannot check tensile strength of each grain of sand so; we form brick of that sand and then check tensile strength of that sand brick. Sand brick is placed in between load cell and DC motor. DC motor continuously applies force on that brick till it breaks and at other side simultaneously load cell converts that force into electrical signal and analog –to-digital converter converts that into digital and it displays on LCD. Force at which point brick breaks motor automatically stops that is the maximum tensile strength of that sand.