Method for manufacturing tubes by welding
AssigneeAISAPACK HOLDINGS s.a.
InventorJacques Thomasset
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Abstract
The invention concerns a method of welding a laminate for the production of flexible tubular plastic bodies. The method comprises the following operations: a laminate is shaped around a welding tool, the ends of the laminate to be welded are heated, the ends are pressed together and at least partly cooled, the welded zone is deformed so as to increase its area, and the weld zone is cooled. The invention also concerns a device that is suitable for using the method mentioned above.
Claims12
Method of welding a laminate for the production of flexible tubular plastic bodies, which method comprises the following operations:
- a laminate, having ends, is shaped around a welding rod;
- the ends of the laminate to be welded are heated;
- said ends are pressed together and at least partly cooled to form a welded zone;
- the welded zone is deformed so as to increase its area;
- and
- the welded zone is cooled after being deformed.
Device for the production of a flexible tubular plastic body from a laminate having ends, wherein the device comprises a welding rod, heating means suitable for heating the ends of the laminate placed around said welding rod, and a set of(a) external rollers that are external to the welding rod and (b) internal rollers housed in the welding rod, and wherein the set of external rollers and internal rollers act together to elongate a welded zone of the laminate.
Dependencies are inferred from the claim text.