Characteristic commentary | of the aluminum extrusion Process, merit demerit, solution, use

Basic way of thinking of the extrusion

4 main steps of the extrusion

1. Heating (preheat of the billet)

   A purpose: I heat a billet of the aluminum alloy to about 400-500 degrees Celsius to make it easy to mold it. In this way, aluminum softens and becomes able to mold it by low pressure. In the billet which it heated, a color does not change red like iron, and the eye color that I saw changes at all with normal temperature time, and there are none.

2. Pushing out (molding)

   A purpose: I put the billet which it heated in the container and put it and push you out of the die by strong pressure. By going along the section of the die then; continuous dozens of meters of aluminum shapes according to shape; do it and have been pushed.

3. Cooling, hikitori (quenching and pulling)

   A purpose: As the aluminum shape which was just pushed is hot, it cools off by water and wind. I pull both ends at the same time so that a product becomes straight and correct transformation and torsion.

4. Cutting, processing

   A purpose: I cut cooling, a corrected long aluminum shape to appointed length. I perform the second processing such as a perforator, cutting, the surface treatment as needed.

Role of "the die" which is essential for extrusion

• A solid model: The simple cross-section business that is not hollow. A middle fruit.
• A Jolo type: Hollow shape (pipe, squared lumber) business. I am doing complicated structure

1. I can mold a complicated cross-section in one body

   It is the biggest strength that the extrusion can mold an aluminum product with a complicated cross-section depending on the design of the die (the dice) at a time.
   An example: A hollow shape, the fin shape such as the heat sink.

2. Die charges are relatively cheap and are superior in mass productivity

   The production expense of the die (the dice) is low, and the extrusion is suppressed in comparison with other metal processing methods (die-casting in particular and forging).
   Merit
   Reduction of the initial investment: As a die expense is relatively low, I can reduce a risk when I develop a new product. The production start in the short term: Because the production period of the die is short, I can shorten time to market injection of the product (lead time). It is most suitable for mass production: I am suitable for production of the large lot once because I can produce the products of the same shape consecutively effectively and fast if I make the die.

3. I am suitable for long thing and lightweighting

   The extrusion can mold the long product of several meters in one body to push materials continually. In addition, I can make the product which I made use of a characteristic of aluminum in to the maximum.
   Merit
   The production of the long thing: It is advantageous in cost and strength to be able to make a pillar, the sash of the building, the long material including the pipe without welding. Realization of the lightweighting: It is adopted widely in the fields such as a car and a plane, bicycle parts because I can be further lightweighted by hollow structures while making use of lightness of aluminum alloy. This is connected directly with improvement of the improvement and campaign for fuel economy efficiency performance.

• Building materials: Sash, sash, handrail, partition

• Electronic equipment: Heat sink, housing (case)

• A car, a railroad: Frame, bumper, interior parts

• Others: Household articles, furniture, medical equipment, frame