Zhangjiagang Langbo Machinery Co. Ltd.
Customer first, Reputation Priceless, Excellent Quality, Considerable Service
Add to Cart
High Quality Plastic PPR/PE Pipe Making Line
In standard extrusion, solid plastic pellets are gravity fed into a forming mechanism, where jacketed compression screws melt and feed the materials into a die. By contrast, Co-extrusion involves multi-layer extrusion forming layered or encapsulated parts. Sometimes five or more materials are used in a single cycle, with each extruder delivering the precise amount of molten plastic needed for the operation.
Unlike ordinary plastic mixing, each individual plastic retains its original properties, but is combined into a compound-material part. If mixed prior to extrusion, the characteristics of the individual materials may be altered, but the end result is a homogeneous product.
Not all plastics are suitable for co-extrusion because some polymers will not adhere to others, although introducing a conductive middle layer can often solve this problem. Plastics with drastically different melting temperatures are also unsuitable for the process, as degradation will occur in the lower melting material. Finally, PVC and acetals should never be coextruded together because of the potentially violent reactions that can occur when they are joined.
FEATURES:
*PLC control, high automation;
*Adopting specialized screw with good plasticizing effect.
*Vacuum calibration, constant temperature control, eliminating pipe stress;
*Adopting co-extrusion head to add color line;
*High extrusion capacity, low and equal temperature of melt.
*Wide processing range of raw materials.