1) What types of products are made using a spider-mandrel die? Why can lubricants not be used in spider-mandrel extrusion?

Must be detailed responses Question : Provide a precise definition of the cross-product. And give an explanation of how it relates to moments of forces.

In a single-barrel extrusion system, the operator observes that the extrudate (made of polyethylene, PE) is being processed at a speed of 0.5m/s with a final diameter of 0.5cm. The screw pitch is 1cm, the barrel diameter is 1.5cm, the barrel length is 10cm, the screw channel depth is 0.3cm and the screw is rotating at 10RPM.  a. Find the head pressure on the die given that the polymer has a viscosity of 300Pa.s. Note that the swell ratio of PE is 1.2. b. Find the length of the die opening.

Calculate the ram pressure during indirect extrusion process when a cylindrical billet is 300 mm long and 150 mm in diameter used to produce a 45 mm diameter. In this process: a=0.8, b=1.4, K=275MPA, n=0.12.

May I have help with this please?

Write a detail note on direct extrusion process.

A round slug 10 mm in diameter and made of a metal with average flow stress 300 MPa is reduced to a final diameter of 7 mm by cold extrusion. Estimate the force on the punch.

A pipe can be manufactured as (a) seamless (cold rolled and extruded) or (b) hot rolled and welded.  (i) Describe the process for manufacturing each type of pipe:  (a) Seamless (cold rolled and extruded) pipe;  (b) Hot rolled and welded pipe.  (ii) Why might a cold rolled seamless pipe be better suited to drilling operations than a hot rolled and welded pipe? A particle reinforced composite (containing flakes) has particles evenly distributed throughout the matrix where the rule of mixtures applies.  (i) State THREE effects that a larger volume of carbon particles within the matrix produces. A drill bit is a cutting tool on the end of a rotary subsea drill. A Thermally Stable Polycrystalline (TSP) drill bit can be used to drill a subsea well. TSP bits are man-made polycrystalline structures consisting of a multitude of synthetic diamond crystals sintered together at high pressure and temperature, used to aid cutting into hard rock formations.  (i) Describe THREE reasons why this type…