This news article was originally written in Spanish. It has been automatically translated for your convenience. Reasonable efforts have been made to provide an accurate translation, however, no automated translation is perfect nor is it intended to replace a human translator. The original article in Spanish can be viewed at Producción rápida de tuberías de PVC gracias al sistema QuickSwitch de Krauss Maffei

Krauss Maffei also introduces the concept of spindle HPG for improving extrusion pipe

Rapid production of PVC pipes system Krauss Maffei QuickSwitch

Drafting PU05/06/2009

June 5, 2009

Since the end of 2007, Wavin pipes manufacturer, located in the Netherlands, is operating with a complete line 'QuickSwitch' of krauss maffei berstorff, represented by Coscollola in Spain, for the production of PVC pipe. This system allows a significant savings in costs.

The QuickSwitch line installed at Wavin is headed by a double KMD 90-36/R extruder spindle, a head pipe QuickSwitch KM-RK 23 QS and a gauge QuickSwitch KM-KK 160 QS.

Wavin uses this line to produce compact PVC pressure pipe, pipe without pressure and pipe of gas pipe. The line set to Wavin has incorporated an ultrasonic meter for wall thickness and a thermal centre at the head of the pipe. The QuickSwitch line is equipped to manufacture pipes with a system of acampanamiento, prerequisite for the pipe of pressure.

With the QuickSwitch system, the dimensions of the pipe are modified during the production process, with just one click all the parameters for each pipe dimension are stored in the line control system

Possibilities for savings

Make changes in the diameter or thickness of the wall by the conventional method of a line of extruded piping means stop, restore its components and restart the line. But with the QuickSwitch, the dimensions of the pipe are modified during the production process, with just one click all parameters for each pipe dimension are stored in the system of control of line.

Without large expenditures for maintenance in the stocks, pipe producers can quickly provide orders of any size pipe.

Wavin uses the QuickSwitch line to produce compact PVC pressure pipe, pipe without pressure and pipe of gas pipe.

New concept of spindle to optimize the extrusion of pipe

The new extrusion machines of double spindle 36 D with a single area of Krauss Maffei Berstorff degassing, are designed to process formulations for PVC pipe more effectively. The new concept of spindle (geometry of high performance HPG) offers numerous customer benefits.

Eliminating the atmospheric degassing in this range of parallel double screw extrusion machines, KraussMaffei Berstorff engineers have been able to use the entire length 36 l/D of the processing unit for optimum PVC resin a plasticizing and homogenization. This new design of extruder in conjunction with the concept of spindle HPG optimized, offers significant advantages.

The effective length of the preheating zone provides greater flexibility for processing a wide range of formulas, getting a yield of up to 10% higher than with the extrusion machines of double degassing.

An area of increased dosage is a more stable process, thanks to the improvement of the capacity to create pressure and optimal control of temperature of mixture in the entire output.

Finally, the area of mixture along with optimized geometry of this area produces a more homogeneous mixture and an exceptional optical quality of pipe. Improves at the same time the dispersion of the additives and the blowing agent in the mix.

The new concept of spindle HPG significantly reduces fluctuations in the process of manufacture for tubes with heavily loaded

The new concept of spindle HPG significantly reduces fluctuations in the process of manufacture for tubes with heavily loaded.

The plasticizing and homogenization of these formulas require a greater energy input, which is achieved in this case more effectively in the preheating zone. The new technology of a single degassing offers exceptional performance in the transformation of PVC-U, PVC-M, foam pipe and pipe formulas that require a high proportion of CaCO3.