Continuous coating of cylindrical workpieces with a thermoplastic - using a mantle head to distribute the extruded, plastified coating material and an advancing thread downstream of this distributor

摘要

An arrangement for continuously covering cylindrical workpieces or other formed profile members with a thermoplastic material, includes an extruder for plastifying the material, a mantle head, and a connection channel between the two machines. The head consists of a hollow cylinder with a material distribution sleeve which has spirally arranged advancing slats. A stationary central pipe is arranged coaxially in the distribution sleeve. An advancing thread is located at the down stream and of the material distributor. ADVANTAGE - The arrangement design ensures no coating material between the material distributor and the central pipe