Advantages - WK Paste Extruder / PTFE Extruder

button Long service life through solid workmanship and use of high quality componentes
button Low wall thickness tolerance through self-centering mandrel and special nozzle
button Additional heatable extrusion cylinder for better extrusion quality
button Measurement transducer like pressure, force and ram speed for permanent control of the extrusion process and extrusion speed
button Hydraulic closure with high closing force for quick loading of the extruder
button Quick loading with special loading carriage - also possible with several pre-forms, no manual touch
button Special pre-form press with pre-form preparation device for multiple loading of the loading carriage i.e. extruder
button Electrically adjustable mandrel
button Measuring and controlling system for constant extruder speed
button Controlling system for constant speed of the extrudate
button Low space requirement through vertical construction
button Front and back charger, vertical and horizontal possible with hydraulic and spindle drive (2 degrees of accuracy)
button Delivery of complete systems possible (PTFE processing, pre-form press, paste extruder oven, winding unit as well as convoluting machine)
button User-friendly and maintenance-free system
button Special drying and sintering oven with adjustable blind, thus a better temperature guidance within the two zones and avoidance of explosion hazard
button The paste extrusion systems are designed especially to costumers requests
button Automatic adjustment of the total system as well as recording of the formula
button Operating through touch screen and recording of the extrusion process parameters

Extrusion process with WK paste extruders

Paste extrusion is a process for the production of thin hoses, thick tubes (liners), wire insulation and unsintered tapes of PTFE. For the PTFE paste technique exclusively emulsion polymerization powder is used. The paste is a mixture of these spongy PTFE powder types with wetted organic fluids like gasoline, light oil etc.
The process is done in batch quantities:
The PTFE lubricant mixture firstly is pre-pressed to so-called billets (pre-forms, candles) and then put into a paste extruder which works on the principle of the ram extrusion. Then the billets are pressed through a conic nozzle in cold or slightly pre-heated condition (approx. 40-60). The extrudate is seperated from the still containing lubricant within the drying zone and then sintered.

(See schematic design of a modern paste extruder)

At the moment more than 27 different types of paste extruders (diam.1 – 300 (600)mm, force 100 – 1500kN) for downloading respectively frontloading are available. They can also be delivered for back loading. The extruder are hydraulic respectively gear spindle driven. We also can deliver you a tailor-made system, if requested. Select your paste extruder resp. your requested system.

We have a lot more paste extruders at our disposal than listed below. 

     

WK Paste Extruder /LC Version - Production Survey

Model

Range of diameter [mm]

Compressive force [kN]

Max. Pre-form diameter Approx. [Inch]

Max. Pre-form Lenght [mm]

WPE 
10/250 VH LC

1...5

100

1.5

250

WPE 10/350 VH

1...5

100

1.5

350

WPE 25/1000 VH LC

2...10

250

2.5

1000

WPE 30/48" VH LC

3...20

300

3"

48"

WPE 40/500 VH LC

6...40

400

4

500

WPE 40/1000 VH LC

6...40

400

4

1000

WPE 40/100 VH LC SP

6...40

400

4

1000

WPE 40/1800 VH LC

6...40

400

4

1800

WPE 60/500 VH LC

6...50

600

6

500

WPE 60/1000 VH LC

6...50

600

6

1000

WPE 80/500 VH LC

6...50

800

6

500

WPE 80/1000 VH LC

6...50

800

6

1000

WPE 80/1000 VS

6...50

800

6

1000

WPE 80/1000 VH LC

6...50

800

6

1000

WPE 80/1200 VH LC

6...50

900

6

1200

WPE 100/1000 VH LC

8...50

1000

8

1000

WPE 100/1800 VH LC

8...50

1000

8

1800

WPE 125/1000 VH LC

8...50

1250

10

1000

WPE 125/1800 VH LC

8...50

1250

10

1800

WPE 150/1000 VH LC

8...50

1500

10

1000
WPE 150/1800 VH LC

8...50

1500

10

1800
WPE 30/1800 HH LC

2...8

300

3

1800
WPE 40/500 HH LC

6...40

400

4

500
WPE 40/650 HH LC

6...40

400

4

650
WPE 40/1000 HH LC

6...40

400

4

1000
WPE 40/3000 HH LC

2...8

400

3

3000
WPE 60/500 HH LC

6...50

600

6

500
WPE 60/1000 HH LC

6...50

600

6

1000
WPE 80/500 HH LC

25...350

800

16/3.5"
8/1/8"

500
WPE 100/650 HH LC

25...350

1000

16/3.5"
8/1/8"

650
WPE 125/1000 VH LC

25...350  

1200

15/2.7"
10/2.5"

800

* Diameter depending on the respective Rv -value (reduction ratio) of the desired tube (hose) and of the used fine powder quality

 

       

© Keicher Engineering AG Hydraulik - Kunststofftechnik