OEM Screen Changers for Polymer Melt Filtration Types

OEM Screen Changers for Polymer Melt Filtration Types include bolt-on adapter type, clamp type adaptation type, thread-on ring & bolt-on adapter type, and other typical ways to fit the existing extrusion lines.

OEM Screen Changers for Polymer Melt Filtration Types:
Bolt-on adapter:
This illustrates the screen changer retro-fitted to an extruder with a bolt-on type connection:
The screen changer is marked with Balloon.
The upstream adapter is bolted to the screen changer and to the barrel flange.
Above the horizontal centerline the adapter is shown with a reduced flow channel through the adapter and into the screen changer body, which transitions to the breaker plate diameter.
Alternatively, below the horizontal centerline, we show the same installation with a screw that extends into the screen changer body. The screw can be smooth or with flights.

Clamp type adaptation:
This illustrates the manner in which our screen changer can be retro-fitted to an extruder with a clamp type connection:
The screen changer is marked with Balloon
It is connected to the extruder barrel with the upstream adapter by means of a clamp.
The drawing shows both options with regard to the extruder screw:
a) Above the centerline: in instances where no screw tip extension is added, the upstream adapter is designed with a reduced flow channel to keep polymer inventory to a minimum. The adapter transitions up to the breaker plate diameter in the screen changer body.
b) Below the centerline: we illustrate the preferred method where the existing screw is extended close to the breaker plate. The extension can be smooth or with flights.

Thread-on ring & bolt-on adapter:
In this illustration, the screen changer is marked with balloon.
An upstream adapter is bolted to the screen changer’s upstream face.
The threaded end of the extruder barrel is fitted with a ring to which the upstream adapter is secured by means of studs and nuts.
The drawing shows both options with regard to the extruder screw:
Above the centerline: where no screw tip extension is added, the upstream adapter is designed with a reduced flow passage to keep minimize polymer inventory.
The adapter transitions up to the breaker plate diameter in the screen changer body.
b) Below the centerline: the extruder screen is shown in the preferred method where the existing into the screen changer body. The extension can be smooth or with flights.

We offer fully automatic, continuous screen changers that are used for polymer melt filtration in every segment of plastics processing including: blown film, blow molding, sheet and film extrusion, filaments & fibers, pipe and profile, pelletizing, BIAX (BOPP and BOPS). Melt filters are designed to be used with all families of thermoplastics, including Polyethylene (LDPE, LLDPE and HDPE) Polystyrene (PS, HIPS), Polycarbonate, ABS, Acrylic, Flexible PVC, Nylon (PA 6, PA 66, PA 11) and Polyesters, as well as a wide range of engineering resins.