The LPA is able to make holes in all types of materials on a moving web up to a maximum thickness of 800 microns. It makes round or shaped holes of different sizes on a moving web, mostly on plastic film. The great advantage of the LPA is the ability to operate at high frequencies and with high production rates.
The LPA has a strong structure and can operate at high frequencies and with high production rates. Designed to be installed on a hosting machine and compatible with all production lines, it guarantees perfect holes on a moving web. It makes both round and shaped holes. Round holes have a diameter between 2 and 50 mm. Shaped holes are all non-circular perforations, such as handles for bags and Euroslot (Mexican hat). The LPA operates with multiple punching tools through which the film flows. The number of punching tools required depends on the customerís needs. A punching tool consists of a hammer (upper part) and a die (lower part) and its action is pneumatically controlled by specially designed electric valves.
It operates at a maximum frequency of 40 strokes per second, and a maximum speed of 260 meters per minute (depending on the material), thus adapting to the production lineís speed. The punching tools are mounted on dovetails on a bridge made of hardened steel. The lower bar can be opened to facilitate the material threading and the changing of the dies. This is a paramount feature for work on extrusion lines: the substitution can be made without stopping the production process. The alignment of the punching tools is easy, fast and adjustable.
MATERIALS = LDPE, HDPE, PP, Coating, FOAM, Paper, PVC.
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