Question

compare these machines in terms of cost and specify the reasons: extrusion machine, injection molding, and hot press machine

Answer 1

Extrusion is a continuous process used to make sheet, pipe and profiles, film and coating, wire covering, filaments and fibers, feeding blow molders, and mixing/making pellets for other processes, including injection molding. Continuous extrusion dominates these markets -- there are ways to extrude into a closed mold, perhaps useful for low-volume applications. Almost all injection molding really does this, too, using a screw to melt the material, and then as a piston to force the melt into the mold. However, these processes are always called "injection," and the use of the phrase "extrusion molding" is confusing without further explanation.

Basically, injection FILLS molds, blow molding (and sheet thermoforming) draws material to the mold surfaces. As a result, injection mounds need to take much more pressure and are therefore much more expensive.

Hot press machines are relatively much less expensive than the above two machines because of the kind of work that it is involved in and the quamquan of work it does.

Average costs are as follows:

Extrusion machine:10lakh /set

Injection molding :15lakh/set

Hot press machine:20000Rs.