Method for preparing extruded material for processing to form sealings

Patent metadata

Field	Value
Publication number	US-10914385-B2
Application number	US-201716338191-A
Country	US
Kind code	B2
Filing date	Oct 11, 2017
Priority date	Oct 13, 2016
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

A method for preparing extruded material for processing to form sealings and/or edge protection strips on vehicle bodies, where the extruded material to be prepared, which is substantially of an elastomer substance, includes a covering strip protecting an adhesive layer and extending in the longitudinal direction of the extruded material. The covering strip has sub-sections that are connected to each other on the abutment ends thereof. The covering strips are detached from the adhesive layer and are reconnected to the adhesive layer, optionally in such a way that they are offset to the longitudinal direction of the extruded material. If the offsetting is carried out, the abutment ends of the sub-sections of the covering strip are arranged such that they are offset in relation to the original position thereof on the adhesive layer.

First claim

The invention claimed is:

1. A method for preparing extruded material for processing to form sealings and/or edge protection strips on vehicle bodies, wherein the extruded material to be prepared, which is composed of elastomeric material, has a cover strip which in terms of length of the cover strip extends in a longitudinal direction of the extruded material and which protects an adhesive layer and is composed of segments that are adhesively bonded to one another at abutment ends, wherein mutually connected segments of the extruded material are adhesively bonded to one another, the method comprising the steps of:
releasing the cover strip from the adhesive layer; and
re-connecting the cover strip to the adhesive layer by way of an offset in the longitudinal direction of the extruded material, wherein the abutment ends of the segments of the cover strip are disposed so as to be offset in relation to an original position of said abutment ends on the adhesive layer.

2. The method according to claim 1 , wherein the abutment ends of the segments of the cover strip prior to being offset are congruent with abutment ends of segments of the extruded material, or only with abutment ends of segments of a double-sided adhesive tape that forms the adhesive layer.

3. The method according to claim 1 , including releasing the cover strip at a release location that is continuous in the longitudinal direction of the extruded material, and re-connecting the cover strip to the adhesive layer at a connection location at a spacing from the release location, wherein a respective released portion of the cover strip is larger than the spacing.

4. The method according to claim 1 , wherein the extruded material is moved in the longitudinal direction of the extruded material in a manner relative to a stationary offsetting installation.

5. The method according to claim 1 , including releasing the cover strip at a release location by a guide roller and re-connecting the cover strip to the adhesive layer at a connection location by a contact pressure roller.

6. The method according to claim 1 , guiding a portion of the cover strip that is released from the adhesive layer by at least one deflection roller or sliding installation that is disposed so as to be spaced apart from the adhesive layer.

7. The method according to claim 1 , including unwinding the extruded material for preparing from a spool and feeding the prepared extruded material directly to a processing station.

8. The method according to claim 1 , including equalizing a length increase of the cover strip arising when releasing the cover strip by re-connecting the cover strip to the adhesive layer in a length-compressed state of the cover strip.

9. The method according to claim 1 , including reversing a length increase of the cover strip arising when releasing the cover strip by heat-treating the elongated cover strip prior to the re-connection to the adhesive layer.

10. The method according to claim 9 , wherein the heat treatment of the elongated cover strip is performed by a hot-air jet.

11. An extruded material for processing to form sealings and/or edge protection strips on vehicle bodies, wherein the extruded material comprises: a body composed of elastomeric material; an adhesive layer; and a cover strip for protection of the adhesive layer, the cover strip extending, in terms of a length of the cover strip, in a longitudinal direction of the extruded material, the cover strip being composed of segments that are adhesively bonded to one another at abutment ends, wherein the abutment ends of the segments of the cover strip are disposed so as to be offset in relation to abutment ends of mutually connected segments of the extruded material through releasing and re-connecting of the cover strip, wherein the mutually connected segments of the extruded material are adhesively bonded to one another.

12. The extruded material according to claim 11 , wherein the segments of the cover strip are connected by connection tabs.

13. The extruded material according to claim 11 , wherein the adhesive layer is one of two adhesive layers of a double-sided adhesive tape.

14. The extruded material according to claim 11 , wherein the cover strip is length-compressed or shrunk after elongation and re-connected to the adhesive layer.

15. The extruded material according to claim 14 , wherein the cover strip is length-compressed and/or shrunk in portions.

Assignees

• Cqlt Saargummi Tech Sarl
• Bayerische Motoren Werke Ag
• Aytec Automation Gmbh

Inventors

• Kast Christian
• Hinz Andreas
• Ruhland Christian

Classifications

• F16J15/328 Primary

  Manufacturing methods specially adapted for elastic sealings (moulding B29C) · CPC title

• B23P19/047

  for flexible profiles, e.g. sealing or decorating strips in grooves or on other profiles by devices moving along the flexible profile (hand tools therefor B25B27/0092) · CPC title