Heat shrinkable plastic hose and method for manufacturing
AssigneeRXS Schrumpftechnik-Garnturen GmbH
InventorsDetlef Graefe, Dieter Sagemuehl
Life of this patent
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Abstract
A method for manufacturing a heat-shrinkable hose, wherein at least one shrinkable thread is wound around a basic hose element. A cover hose is provided that surrounds the basic hose element and overlies the heat-shrinkable thread. Longitudinal supporting threads can be provided for additional reinforcement.
Claims22
A method for continuously manufacturing a heat-shrinkable plastic hose having heat-shrinkable threads, said method consisting of the following steps:
- continuously extruding a basic hose element of plastic material from a first extruder;
- stretching at least one heat-shrinkable thread to form at least one pre-stretched thread;
- helically continuously winding said at least one pre-stretched thread onto said basic hose element, thus continuously forming a heat-shrinkable wound basic house element having a shape memory;
- continuously extruding a cover hose of plastic material from a second extruder onto said heat-shrinkable sound basic hose element, thus continuously forming a finished shrinkable hose having a radial shrink-factor of 5 through 10;
- and
- cross-linking said shrinkable hose.
A method for discontinuously manufacturing a heat-shrinkable plastic hose having heat-shrinkable threads, said method consisting of the following steps:
- stretching at least one heat-shrinkable thread to form at least one pre-stretched thread;
- forming a cylindrical fabric section including said at least one pre-stretched thread as a circumferential thread and a plurality of longitudinal supporting threads;
- extruding a basic hose element of plastic material from a first extruder;
- applying said fabric section onto said basic hose element, thus forming a wound basic hose element;
- impressing a shape memory onto said wound basic hose element;
- extruding a cover hose of plastic material from a second extruder onto said wound basic hose element, thus forming a shrink-hose;
- and
- cross-linking said shrink-hose.
Dependencies are inferred from the claim text.