pagetop

Manufacturing Process

A state-of-the-art production line realizes both high quality and cost competitiveness

The First Phase Line dealing with the processes from cold rolling to finishing was completed in January 2014, and the Second Phase Line responsible for the processes from casting to hot rolling was completed in summer 2015. This system enables annual production of 192,000 tons of aluminum sheet.

UACJ (Thailand) has established an optimal manufacturing process to meet the needs of a variety of aluminum products, including automotive heat exchanger materials and beverage can end materials.

Manufacturing Process

Manufacturing Process
Melting & Casting Process
Aluminum metal

Aluminum metal

Aluminum products are produced from lumps of aluminum called ‘ingots’ created by electrolytic refining.
Aluminum metal
Melting furnace

Melting furnace

Aluminum metal and other metallic materials are mixed and melted at a high temperature to form the required ratio of components.
Melting furnace
Holding furnace

Holding furnace

The furnace keeps the molten aluminum from the melting furnace hot to prevent it solidifying before casting.
Holding furnace
Degassing treatment
Degassing treatment

Degassing treatment

To avoid defective surfaces, a purge gas absorbs the hydrogen gas dissolved in the molten aluminum and lets it float to the surface.
Removing inclusions

Removing inclusions

A ceramic filter is used to remove minute oxides and inclusions dissolved in the molten aluminum.
Casting

Casting

Molten aluminum is poured into molds of sizes that vary depending on the product to produce aluminum alloy slabs.
Casting
Slab

Slab

It is possible to produce the world’s largest slabs, including ones with a gross weight of over 32 tons, a width of over 2 meters, and a thickness of over 600 millimeters.
Slab
Hot rolling process
Cutting

Cutting

The base of slabs, which may have been bent or cracked during hot rolling, are cut. The top of some types is also cut.
Cutting

Scalping

This facing equipment fettles and removes metallically any uneven parts of the slab surface.
Scalping
Soaking

Soaking

To homogenize the internal structure of slabs, annealing (heating) is conducted.
Soaking
Heating

Heating

Slabs are reheated to a high temperature in a heating furnace to prepare for hot rough rolling.
Heating
Hot rough rolling mill

Hot rough rolling mill

One unit of a four-stage rolling mill produces the target thickness from a 500mm-thick slab. For beverage can materials, rolling is repeated 20 times in both directions.
Hot rough rolling mill
Hot rolling finishing mill

Hot rolling finishing mill

The four serial units of a four-stage rolling mill produce the target thickness and roll the sheet into a coil. Our original technique produces coils with superior thickness precision, sheet crown (across-the-width cross-sectional shape), and mechanical properties.
Hot rolling finishing mill
Cold rolling process
Cold rolling

Cold rolling

A non-reversible six-stage single-stand rolling mill produces products with high thickness precision and the required strength, surface roughness, and polish.
Cold rolling
Finishing
Tempering

Tempering

Final tempering and annealing are carried out to meet the processing requirements of customers.
Tempering
Leveling

Leveling

The flatness of rolled aluminum sheets is normalized to a high level of precision.
Leveling
Surface treatment & coating

Surface treatment & coating

Chemical surface treatment is carried out to remove surface grease, add an undercoating, provide corrosion resistance, etc. Next, a dedicated aluminum sheet paint line provides an optimal surface treatment.
Surface treatment & coating
Slitting

Slitting

The coils are continuously cut and wound into products with the required widths.
Slitting
Inspection & packaging

Inspection & packaging

A final inspection is carried out to ensure that the completed products satisfy the specifications ordered. They are then packed in an optimal manner for transport and storage.
Inspection & packaging
To the customer
To the customer
Copyright © UACJ(Thailand) Co., Ltd. All Rights Reserved.
TEL: +66(0)-38-027-360 FAX: +66(0)-38-027-370