What are the advantages of Injection moulding.
[3 marks]Define: (i) Shot weight (ii) Back pressure (iii) Suckback (iv) Plasticizing capacity
[4 marks]Draw and explain Injection Moulding Machine and its parts.
[7 marks]State the Melt Mechanism of Injection Molding Screw.
[3 marks]What is clamping system? Provide types of it?
[4 marks]Explain thermoset injection molding process in detail.
[7 marks]Write the machine startup and shut down the procedure of the injection moulding machine.
[7 marks]How to calculate clamp force?
[3 marks]Explain different auxiliary machinery used in Injection Moulding machine.
[4 marks]Compare: Reciprocating Screw Machine with Plunger injection molding
[7 marks]What do you mean by Purging? Describe its significance.
[3 marks]Define (1) L/Dratio (2) compression ratio (3) helix angle (4) pitch
[4 marks]Explain about Cavity pressure profile in Injection molding.
[7 marks]What types of screws are for the injection moulding machine?
[3 marks]Explain PVT profile inside the cavity
[4 marks]Define Nozzle. Explain standard Nozzle with neat sketch.
[7 marks]Explain in brief about Nozzle alignment.
[3 marks]Calculate the clamping force in ton for the product having projected area 400 cm2 and cavity pressure is 476 bar.
[4 marks]List out the types of process variables that affect the injection cycle and explain them in detail.
[7 marks]Define Projected area and tonnage calculation.
[3 marks]What is the purpose of hopper loader in injection moulding machine?
[4 marks]Give causes and remedies of the following defects: 0 (1) Silver steaks (2) Warpage (3) Shrinkage (4) Bubbles & Voids (5) Sink mark (6) Shorts (7) Weld Line
[7 marks]Compare the Hydraulic & Toggle system for clamping.
[3 marks]What is Nitriding? Why is it required for screw and barrel?
[4 marks]Write note on (i) Plunger type machine (ii) Plunger- plunger type machine (iii) Screw- Plunger type machine
[7 marks]