Welding Engineers Ltd.

Rue Saint-Léger 4, 1205 Geneve
Telephone +41 22 3281606
Fax +41 22 3283104


Hall map

K 2016 hall map (Hall 9): stand A76

Fairground map

K 2016 fairground map: Hall 9

Our range of products

Product categories

  • 03  Machinery and equipment for the plastics and rubber industries
  • 03.02  Machinery and plant for processing
  • 03.02.001  Extruders and extrusion lines
  •  Extrusion lines
  •  Extrusion lines for rubber

Our products

Product category: Extrusion lines for rubber


FINISHING LINE CONFIGURATION The configuration of the finishing line depends of the rubber grade to process. Most rubber grades are running on the following configuration: SDU, VCU, Turbulator and TCU. For some applications an SDU with Turbulator followed by a thermal drying stage is also used. SCOPE OF SUPPLY We have supplied complete finishing lines including all peripheral equipment such as bagging and baling equipment, control system, cooling and heating system, classifying system, airveying...etc. For all this equipment, we can produce a layout optimising the following criteria: Best use of the building volume allocated by the customer . Shortest connection between the equipments. Best access for cleaning and maintenance. In addition to the operating and maintenance manuals for all the equipment supplied, W.E standard documentation package includes the following documents: Layout drawings Foundation drawings Process flow drawings (PFD) Process and instrument diagrams (PID) Interlock diagrams Electrical schema Data sheets for items procured by Customer Etc

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Product category: Extrusion lines for rubber

Polymer filter

If you have to filter Extruded polymer and you do not want to stop the process for cleaning, try the Kleen-Screen® FROM WELDING ENGINEERS LTD.


Contaminants removed from extruder screens during continuous operation.
Extruder can be started up or purged without passing material through screens or die.
Screens need to be changed only occasionally, and without interruption of the filtering process.
Screens can be inspected, or mesh changed, without interrupting extrusion operation
Screens "regeneration" possible by back-flush without interruption of the filtering process



The Kleen-Screen is not a screen changer but an apparatus for cleaning extruder screens.
It can be applied, and profitably so, to every extrusion operation not involving extremely heat sensitive thermoplastics.
It totally eliminates loss of product due to screen changing. Simply turn a valve and clean your screens by back-flushing, without interrupting your extrusion operation.
Screens need to be changed only occasionally.
If you want to change your screen mesh for some reason, this can be done rapidly without interrupting your extrusion operation.
After an overnight stoppage, for example, you can purge your extruder of degraded material without passing it through the screens or through the die.
There are no more hold-up points in the Kleen-Screen than in many extrusion die designs.
The pressure drop caused by the Kleen-Screen is no greater than that caused by conventional screens.
The back-flushing operation lasts only a few seconds. Since only a slight percentage of material is diverted, the degree to which your extruder product will be off-gauge is in most cases negligible.
The Kleen-Screen valving system is carefully designed to eliminate all hazards of shutting off the flow and thereby damaging the extruder



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About us

Company details

Welding Engineers has supplied synthetic rubber finishing lines to the industry for over 50 years.


Welding Engineers Ltd. is located in Geneva, Switzerland.

The company was founded in 1958 as the regional sales offices for the US parent company.

With the rapid growth of the synthetic rubber industry in Europe in the 60' s Welding Engineers took over the engineering, manufacturing and sales of the synthetic rubber dewatering and drying extruders first in Europe, then worldwide.


The extruders have been constantly  evolving to meet the industry's needs for higher capacity, quality and productivity as well as reduced emissions and lower maintenance.


Today, Welding Engineers not only manufactures dewatering and drying extruders for virtually any kind of synthetic rubber, but also supplies complete rubber finishing lines to suit its Customers' needs.

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