

The window profile, or window frame, can be made mainly from three different materials: plastic, i.e. PVC, wood and aluminium. Plastic profiles are the most common and the most economical. Laminated timber frames are valued for their naturalness and rigidity, which is particularly important for larger patio windows. However, they are more expensive, heavier and require regular maintenance. Aluminium profiles, on the other hand, although they have the highest cost, are the most rigid, durable and maintenance-free. This is why their share of the market is steadily increasing, although due primarily to their high price, they still do not exceed a few percent.
Ideally, the more the pressure, the greater the extrusion it can produce. The machine applies the initial pressure crushing the billet against the die.
Thresholds
Cast iron, a material often associated with sturdy cookware and architectural structures, has a rich history that extends into the realm of weaponry. Among the various applications of cast iron, spears have emerged as a fascinating subject of study. The use of cast iron spears dates back centuries and represents a pivotal evolution in both material science and warfare.

