US 11,697,261 B2Granted

Process and apparatus for building tyres

AssigneePirelli Tyre S.p.A.

InventorsMaurizio Marchini, Mario Mariani, Silvio Montanari, Oliver Haupt

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Abstract

A process and an apparatus for building tyres, wherein, in the process, a carcass sleeve including at least one carcass ply and a pair of annular anchoring structures is transferred to a shaping drum including flange elements that are each engageable with one of said annular anchoring structures. The carcass sleeve is shaped according to a toroidal configuration. Before shaping, annular grip elements respectively carried by the flange elements are radially expanded, each inside one of the annular anchoring structures, in order to engage the carcass sleeve. The annular anchoring structures are moved axially apart from each other before engaging the carcass sleeve by the annular grip elements.

Claims19

Dependent claims

An apparatus for building tyres, comprising:

carcass loading devices for transferring, to a shaping drum, a carcass sleeve comprising at least one carcass ply and a pair of annular anchoring structures, wherein the shaping drum comprises two flange elements with one on each end of the shaping drum, and wherein each flange element is engageable with one of the annular anchoring structures of the carcass sleeve and each flange element comprises a radially expandable annular grip element and an abutment member, which is positioned at an axially inner position relative to the annular grip element;
and
shaping devices for shaping the carcass sleeve according to a toroidal configuration by axially inserting the abutment members in the carcass sleeve by:
axially moving the annular grip elements and the abutment members of the flange elements in a mutual approaching manner from an outside towards an interior of the shaping drum;
mutually moving apart each of the flange elements with the abutment members causing a mutual axial moving apart of the annular anchoring structures with consequent axial tensioning of the carcass sleeve;
and
radially expanding the annular grip elements for engagement with the annular anchoring structures.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/183,325Filed 23 Feb 2021 · division
Priority: IT MI2014A00097027 May 2014
Published: US 2021/0197509 A11 Jul 2021
Granted: 11 Jul 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B29D 30/1614
Applying the layers; Guiding or stretching the layers during application: by sliding a preformed tubular layer over the core
B29D 30/245
For manufacturing substantially cylindrical tyre components with cores or beads, e.g. carcasses: drums for the single stage building process, i.e.…
B29D 30/32
By the flat-tyre method, i.e. building on cylindrical drums: fitting the bead-rings or bead-cores; Folding the textile layers around the rings or…
B29D 30/36
Pneumatic tyres or parts thereof: expansion of tyres in a flat form , i.e. expansion to a toroidal shape independently of their building-up…

Family

PCT/IB2015/053135Parent of this division · filed 30 Apr 2015
US 2021/0197509 A1Pre-grant publication · published 1 Jul 2021
Application15/312,379Parent of this division
US 10,960,624 B2Parent of this division
US 2017/0106616 A1Published application
US 11,697,261 B2This patent

From the US filing history. Foreign family members aren’t listed.