Method for helically wrapping a part
The invention relates to a method for wrapping a long or round part, for example a steel part, for instance in the form of a steel strip coil, a steel wire roll or a round steel part such as a roller bearing ring, the steel part being wrapped in a stretch film, in particular a plastic stretch film, in a helical and covering manners. In order to realize a short term wrapping of a long or round part, irrespective of its material properties, and as a reliable transport protection the invention proposes that a strip material which is significantly more resistant than the stretch film and has an ad coating on the side facing—the stretch film is wound over the stretch film likewise in a covering manner.
1. A wrapping method comprising:
helically wrapping a part in a plastic stretch film,
substantially simultaneously helically wrapping the plastic stretch film with a strip material which is more resistant than the stretch film and which has an adhesive coating on a side facing the plastic stretch film so that the stretch film is interposed between the adhesive coating and the part and direct contact between the adhesive coating and the part is prevented, the helical wrapping of the strip material being made in the same direction as the helical wrapping of the plastic stretch film.
2. A method according to claim 1 , wherein the stretch film is wound in an overlapping manner in the individual helical turns.
3. A method according to claim 1 , wherein the strip material has a smaller width than the stretch film.
4. A method according to claim 1 , wherein the helical wrapping of the strip material is carried out in the form of a plurality of strips in association with one strip of the stretch film.
5. A method according to claim 4 , wherein the plurality of strips of the strip material run in simultaneously.
6. A method according to claim 4 , further comprising
while feeding the strip material toward the part, cutting the strip material into the plurality of strips.
7. A method according to claim 6 , wherein the plurality of strips of the strip material run in simultaneously.
8. A method according to claim 1 , wherein the adhesive coating extends continuously along the side of the strip material.
9. A method according to claim 1 , wherein
prior to the helical wrappings, the strip material has an opposite side to the side that has the adhesive coating, and the opposite side of the strip material is free of adhesive; and
after the helical wrappings, the adhesive coating is in direct contact exclusively with the plastic stretch film or with the opposite side of the strip material of a previous, underlying helical turn.
10. A method according to claim 1 , wherein
the helical wrappings are performed such that a maximum of 4 layers of the plastic stretch film and the strip material exist at any point on the wrapped part.