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Plastic PPR PE Pipe Making Line 3 Layer PLC Remote Control
High Quality Plastic PPR/PE Pipe Making Line
Co-Extrusion Process Technology
In standard extrusion, solid plastic pellets are gravity fed into a forming mechanism where jacketed compression screws melt and feed materials into a die. Co-extrusion involves multi-layer extrusion forming layered or encapsulated parts, with up to five or more materials used in a single cycle. Each extruder delivers precise amounts of molten plastic required for the operation.
Unlike ordinary plastic mixing, each individual plastic retains its original properties while being combined into a compound-material part. When mixed prior to extrusion, material characteristics may be altered, resulting in a homogeneous product.
Not all plastics are suitable for co-extrusion. Some polymers won't adhere to others, though introducing a conductive middle layer can often solve adhesion problems. Plastics with drastically different melting temperatures are unsuitable due to potential degradation in lower-melting materials. PVC and acetals should never be coextruded together because of potentially violent reactions when joined.
Complete Extrusion Line Components
Single screw extruder
Co-extruder for manufacturing marking line on pipe or multilayer pipes
Die head
Vacuum tank (single or double vacuum chamber design based on diameter)
Cooling tank (one, two, or three tanks based on diameter requirements)
Haul-offs (double, three, four, six, eight, ten, or twelve caterpillars based on diameter)
Cutter (no-scraps cutter or planetary cutter design based on diameter)
Coiler/Tipping chute
Key Features & Advantages
PLC control system for high automation
Specialized screw design for optimal plasticizing effect
Vacuum calibration with constant temperature control to eliminate pipe stress
Co-extrusion head for adding color lines
High extrusion capacity with low, equal melt temperature
