BE-15 Pipes and Materials: Welding of Plastic Pipes
Extrusion welding
Procedure
Extrusion welding is characterised by the following features:
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A welding additive of the same kind and the same moulding material is used in the welding procedure.
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The extruded and plastified welding additive (extrudate) leaks as a line from a plastifying unit.
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The extrudate is homogeneous and completely plastified.
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The joining layers are heated up to the required welding temperature and plastified.
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The extrudate is spread by a welding shoe and pressed on. That means that the joining procedure is carried out under pressure.
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