Extruders

Extruders

Extruders are mainly used for application of adhesive (glue between FBE and top coat) and top-coat layers (mechanical protection). This in a 3-layer polyethylene (3LPE) or polypropylene (3LPP) pipe coating process where Selmers’ own designed extruders are developed for the main purpose of pipe coating application. The top-coat extruders are specially designed for high outputs when processing high density PE materials and having reduced optimized output for medium/low density PE or PP materials. Other purpose for Selmers’ extruders are PP-foam application, color marking and jacket extrusion (e.g. in pipe insulation process).

Advantages:

Own design, specially designed for pipe coating application

All extruders can be operated from HMI panel

Multi purpose design (PE, PP, PP foam can be processed with same extruder)

How it Works

All settings, such process temperatures (barrel), screw speeds, motor current, level indicators, melt pressure and temperature indicator, can be set and monitored from HMI panel.

 

The Full Scope:

High efficiency AC drives

Hopper with magnetic separator

High/low level indicator for hopper

Dedicated vacuum loader

Optional:

Screen changer

Various extrusion die dimensions (flat and ring)

Weld seam compensation (acceleration roller or injection)

Pressure roller systems

Lifting platform (extrusion from top)

Big-bag unloader

Granules drying/pre-heating systems

 

This system can also be found as a part of the: 

External 3LPE/PP-5LPP Foam Pipe Coating Plant

Powerful extruder for coating from Selmers

Adhesive extruder output: up to 450 kg.hr

Top-coat extruder output (max kg/hr): up to 2500 kg/hr HDPE  up to 1500 kg/hr PP

Diameter range wrap extrusion process: 4½” – 144” (114,3 – 3,700 mm)

Diameter range sleeve extrusion process: 2⅜” – 24” (60,3 – 610 mm)

* other specifications upon request

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