Page 15 - TYCONS - ANNUAL REPORT 2022

Tycoons Worldwide Group (Thailand) Plc.

Billets, after being straightened, are loaded to be desalted by a shot blast, and transferred
towards a fluorescent magnetic powder flow detector to be inspected and marked for
defective parts on all four surfaces.

2) Billet grinding:
Defects on surface of billets are removed by wheel grinding. Complete grinding produces
a high-quality surface suitable for cold heading, cold forging, cold drawing, cold
stranding, and other intensive processing works using billets as raw material.

3) Reheating furnace:
Billets are charged into a reheating furnace to heat to the temperature required for rolling.

4) Rolling line:
Billet is discharged to the mill stand; the mill stand includes roughing mills, intermediate
mills, and finishing mill totaling 18 rolling stands. After being rolled, the product is passed
through bar reel in order to reel the product bar into coils. With the ventilation system,
bar coils are force draft cooled to produce a finished product called “bar in coil”

5) Convolution conveyor:
After finishing, the product is continuously rolled by 10 rolling stands of finishing block,
a “loop layer” shapes the straight line product into circular convolutions, after which it is
moved to a convolution conveyor, producing “wire rod coil”.

Annealed wire

1) Intermediate drawing: Wire rod is transformed into smaller wire. TYCN has 13 drawing
machines for small size and 10 drawing machines for big size.

2) Spheroidized annealed: Wire from step 1 will be annealed through the spheroidized
annealed machines. Currently, TYCN has 11 bases machines.

3) Pickling & coating: Wire will be surface cleaned using one operating line and coated
with the rust proof solution as well as lubricants using one of 2 operating lines.

4) Skin pass: In the final stage, wires will pass through the skin pass drawing process.
TYCN currently has 24 skin pass machines.

Screws & Bolt

1) Heading and threading: Wire will be delivered to the forming plant, passing through the
heading and threading machines.

2) Case hardens: After the forming process, screws are treated by carburization to improve
their mechanical strength.

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