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Method of automatic application of adhesive film, e. g. structural adhesive film

IP.com Disclosure Number: IPCOM000245746D
Publication Date: 2016-Apr-04
Document File: 2 page(s) / 106K

Publishing Venue

The IP.com Prior Art Database

Abstract

For automatic application of adhesive films, e. g. structural adhesive films, in a continuous manufacturing process, the adhesive film is supplied in form of so called levelwound rolls with the adhesive film being wound in several levels around an inner core. The current idea deals with the method of providing a new levelwound roll in such a manner that the tape can continuously be applied.

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Method of automatic application of adhesive film, e. g. structural adhesive film

For automatic application of adhesive films, e. g. structural adhesive films, in a continuous manufacturing process, the adhesive film is supplied in form of so called levelwound rolls with the adhesive film being wound in several levels around an inner core. It is possible that the adhesive film is sandwiched between a primary and a secondary liner. It is also possible that the adhesive film only provides one liner. If two liners are present, the secondary liner, which is provided on top of the tape, is removed directly when unwinding the levelwound roll.

The current idea deals with the method of providing a new levelwound roll in such a manner that the tape can continuously be applied. This can for example be done, by joining the tape of the new levelwound roll with the tape of the expiring levelwound roll with a changeover splice. The desire for the splicing step to cause short or no manufacturing down-times and the quality requirements of highly automated manufacturing processes both require to keep manual splicing operations minimized.

It is known, to make changeover splices with an automatic splicer, into which levelwound rolls are fed with the primary liner on top. A secondary liner - if present - has already been removed. A splicing tape can be applied on the outer side of this primary liner. In such a way a splice is prepared with the ends of the new and the expiring levelwound roll in butt position and with the edges of the adhesive film and the primary liner flush for each roll. (see below picture).

For the actual application the adhesive film on a primary liner is fed into an application head with primary liner on top. In the application head two things need to happen at the same time:


a) applying the tape onto a surface and


b) peeling the tape from the liner.

The peeling step needs to be done in a reliable manner in order to be able to reliably apply the tape wrinkle free. The liner can for example be stripped off the adhesive film at a blade-like stripping...