Krah AG of Schutzbach, Germany, has improved its technology for making large-diameter pipe.
By adding a gravimetric dosing system to mix four components, including chopped fibers, and a new control system, Krah has been able to reduce the weight of the pipe. Material changes no longer affect the pipe, the company said.
The gravimetric dosing system means a mass pump no longer is needed.
The new machine now can produce pipe in both directions, while the extrusion unit now is fixed and the production system, with the mandrel, moves along the extruder — saving time and space.
Krah's patented technology winds the extruded mandrel into large-diameter pipe. The company said a new profile design makes them lighter with stronger walls.
For inline socketing, Krah said it has modified the form of the socket to improve the quality.
Krah also has seen growth in the market for sea outflow pipes, selling its machine, called the KR750, to a Eurotrubplast project in Russia.
Krah North America Inc. is based in Greenwood, S.C.
Tel. 864-223-0592, fax 864-223-9406, e-mail [email protected]