Station for checking formation of beads of tyres

Patent metadata

Field	Value
Publication number	US-11370187-B2
Application number	US-202117219708-A
Country	US
Kind code	B2
Filing date	Mar 31, 2021
Priority date	Dec 20, 2016
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

A station for checking the formation of beads of tyres, including: a forming drum for arranging a carcass sleeve with formed beads with the carcass sleeve in rotation, an image acquisition system for acquiring at least an image of a circumferential portion of external surface including the respective edges of the end flaps turned up; a processing unit for processing the image in order to determine a circumferential trend of the axial distance of each edge from an axial reference plane and for detecting possible defects of the beads as a function of such trend.

First claim

The invention claimed is:

1. A station for forming beads of tyres, the station comprising:
a forming drum and rotation members for rotating the drum about an axis thereof;
members for fitting, or building, annular anchoring structures on opposite end flaps of a carcass sleeve arranged on said forming drum;
turning up members for turning up said end flaps around said annular anchoring structures to form said beads;
an image acquisition system configured for acquiring at least one image representative of at least one circumferential portion of a radially external surface of said carcass sleeve arranged on said forming drum, said at least one circumferential portion comprising respective edges of said end flaps turned up of said beads; and
a processing unit configured and programmed for processing said at least one image in order to determine a circumferential trend of an axial distance of each edge of said end flaps turned up of said beads from a reference plane on said carcass sleeve orthogonal to said axis and to detect possible defects of said beads as a function of said trend.

2. The station according to claim 1 , wherein the image acquisition system comprises two acquisition devices each one configured for acquiring a respective image representative of a respective circumferential portion of the radially external surface of said carcass sleeve, each respective circumferential portion comprising one respective of said edges of said end flaps turned up, and said processing unit is configured and programmed for processing said two images in order to determine said circumferential trend of the axial distance of each edge.

3. The station according to claim 2 , wherein each acquisition device is configured to be movable along an axial direction independently from the other acquisition device.

4. The station according to claim 1 , wherein said acquisition system comprises at least one linear laser beam triangulation three-dimensional sensor.

5. The station according to claim 1 , comprising a support frame on which said acquisition system is installed, wherein said support frame is movable along a radial direction with respect to said forming drum.

6. A system for inspecting beads of tyres, comprising:
a rotatable forming drum for arrangement of a carcass sleeve on said forming drum, the carcass sleeve comprising beads formed by end flaps of the carcass sleeve turned up around annular anchoring structures;
an image acquisition system configured for acquiring at least one image representative of at least one circumferential portion of a radially external surface of said carcass sleeve arranged on said forming drum, said at least one circumferential portion comprising respective edges of said end flaps turned up of said beads; and
a processing unit configured and programmed for processing said at least one image in order to determine a circumferential trend of an axial distance of each edge of said end flaps turned up of said beads from a reference plane on said carcass sleeve orthogonal to said axis and to detect possible defects of said beads as a function of said trend.

Assignees

• Pirelli

Inventors

• Vaniglia Erika
• Regoli Fabio
• Boracco Stefano
• Conti Davide

Classifications

• B29D30/32

  Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores · CPC title

• B29D30/0061 Primary

  Accessories, details or auxiliary operations not otherwise provided for · CPC title

• G06T7/521

  from laser ranging, e.g. using interferometry; from the projection of structured light · CPC title

• G06T2207/10004

  Still image; Photographic image · CPC title

• G06T7/62

  of area, perimeter, diameter or volume · CPC title