Question

You are designing a 200mm long x 100mm wide x 50mm deep rectangular housing, with a wall width of 1.5 mm, and 1 degree draft. You wish to eject by pushing on the inner bottom surface, near the walls (through the core) with pins no bigger than 3 mm diameter. The coefficient of friction is predicted to be 0.5. The material specified is Inspire 702 polypropylene, which has a modulus of 1740 MPa, a yield strength of 21 MPa, a solidification temp of 176C, an ejection temperature, DTUL, of 80C. Its coefficient of thermal expansion is 9.5e-5 m/m-C. The overall length of the pins are 300 mm and the pin material material has modulus of 200 GPa. What is the minimum amount of pins required

Answer 1

365gpa I don’t even know what it is but this is with 10 point and I need it