Barış ERDEM (030060085) 5th Week

Impact milling 

In Impact milling, metal particals are driven against a metal target using a high velocity gas stream. A blocky powder particle is produced that has less tendency to align preferently during powder compaction than those produced by ball or attrition milling. When the powder is compacted under heat and pressure, it is more uniform, resulting in greater ductility. Since the low ductility of metal has always been a concern, improvements in room temperature ductility have been achived by control of preferred orientation, improved purity, reduction of insclusions, control of inclusion distribution, and by reducing grain size.


(Campbell F.C., Manufacturing Technology for Aerospace Structural Materials, 2006, p. 112)

Paralel Data Communication (Transmission)
Several bits are sent simultaneusly over a number of parallel wires. This method is used inside the computer (using various computer buses) and for very short distances of up a few meters. A parallel port, for example, can send 8, 16, 32 bits simultaneously down seperate lines. A printer is often connected to a PC via parallel port if the printer is sitting right next to computer. Parallel transmission will transmit data more quickly than serial transmission.

(Chasemore R., ‘AS’ Level Computing, 2004, p. 59)

Rubber injection molding

Injection molding is now a well-established fabrication process in the rubber industry. Its advantages in most situations over the older processes of comression and transfer molding have been amply demostrated. These advantages comprise reduced labor costs, shorter cure times, better dimensional control, and more consistent mechanical properties of the product. The operation of an rubber injection-molding machine requires: feeding, fluxing and injection of a measured volume of compound, at a temperature close to the vulcanization temperature, into a closed and heated mold; a curing period; demolding; and, if necessary, mold cleaning and/or metal insertion, before the cycle starts again.

(Johnson P. S., Rubber Processing, 2001 p. 122)

Knuckle-Joint Press

Knuckle-Joint Press is best for coining, squeezing, and forging work. A great deal of force with a short stroke can be optained with this type of press. Link mechanisms are used in knuckle- joint press because of the high mechanical advantage that is obtained near the bottom of the stroke.

(Johnson H. V., Manufacturing Processes, 2002, p.188)