The extrusion process used in manufacturing short length componen

SOLUTION

Explanation:

Extrusion:

Extrusion is the process in which the workpiece material is forced to flow through a die opening by applying a compressive force to produce a desired cross‑sectional shape.

In general, extrusion is used to produce long parts of uniform cross-sections.

Extrusion is classified in general into four types. They are Direct extrusion, indirect extrusion, impact extrusion and hydrostatic extrusion. 

Direct extrusion, also called forward extrusion, is a process in which is the billet moves along the same direction as the ram and punch do. Sliding of the billet is against a stationary container wall. Friction between the container and billet is high.

Indirect extrusion (backward extrusion) is a process in which punch moves opposite to that of the billet. Here there is no relative motion between container and billet. Hence, there is less friction and hence reduced forces are required for indirect extrusion. 

In hydrostatic extrusion, the container is filled with fluid. Extrusion pressure is transmitted through the fluid to the billet. Friction is eliminated in this process because there is no contact between billet and container wall.

Impact extrusion: Hollow sections such as cups, toothpaste containers are made by impact extrusion. It is a variation of indirect extrusion. The punch is made to strike the slug at high speed by impact load. Tubes of small wall thickness can be produced. Usually metals like copper, aluminium, lead are impact extruded. This process is used in manufacturing short length components like toothpaste tubes, gun shells etc.

As here impact extrusion is not in option and impact extrusion is a variation of indirect extrusion. ∴ The correct answer will be Indirect extrusion.