# US 12,005,662 B2 · Insert for a mould for vulcanising tyres for vehicle wheels, process for producing said insert and process for vulcanising tyres

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- Number: US 12,005,662 B2
- Document ID: US12005662B2
- Status: Granted
- Kind: B2
- Application number: 17/596,222
- Filed: 2020-05-28
- Published: 2022-09-22
- Granted: 2024-06-11
- Earliest claimed: 2019-06-13
- Assignees: Pirelli Tyre S.p.A.
- Applicants: Pirelli Tyre S.p.A.
- Inventors: Angelo Mazzucato; Alfredo Balini
- Web page: https://patentgrep.com/patent/US12005662B2

## CPC

- B29D 30/72: Side-walls
- B29D 30/0606: {Vulcanising moulds not integral with vulcanising presses (for solid tyres B29D30/02)}
- B60C 13/001: {Decorating, marking or the like}
- B29D 2030/0612: {Means for forming recesses or protrusions in the tyres, e.g. grooves or ribs, to create the tread or sidewalls patterns}
- B29D 2030/0616: {Surface structure of the mould, e.g. roughness, arrangement of slits, grooves or channels}
- B29D 2030/726: {Decorating or marking the sidewalls before tyre vulcanization}
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES

## Abstract

An insert for a mould for vulcanising tyres for vehicle wheels, the insert arranged to receive in a seat formed on a moulding surface of the mould and comprising a base surface from which a plurality of projections extends; wherein, each projection comprises a lateral surface extending away from the base surface such that the lateral surface defines a tapered profile of the projection away from the base surface, is inclined at an angle between 10° and 25° with respect to a direction perpendicular to the base surface, and has a roughness between 4 and 11 μm.

## Claims

### Claim 1

An insert for a mould for vulcanising tyres for vehicle wheels, the insert arranged to be received in a seat formed on a moulding surface of the mould and comprising a base surface from which a plurality of projections extends, each of the plurality of projections comprises a lateral surface extending away from the base surface towards a peak of the projection that is remote from the base surface,
wherein the lateral surface
defines a tapered profile of the projection away from the base surface,
is inclined at an angle between 10° and 25° with respect to a direction perpendicular to the base surface, and
has a roughness between 4 μm and 11 μm.

### Claim 2 (depends on 1)

The insert according to claim 1, wherein the projections are identical to one another.

### Claim 3 (depends on 1)

The insert according to claim 1, wherein the lateral surface is inclined at an angle between 15° and 25° with respect to the direction perpendicular to the base surface.

### Claim 4 (depends on 1)

The insert according to claim 1, wherein the lateral surface has a roughness between 5.5 μm and 8 μm.

### Claim 5 (depends on 1)

The insert according to claim 1, wherein the base surface has a roughness that is less than the roughness of the lateral surface.

### Claim 6 (depends on 1)

The insert according to claim 1, wherein the base surface has a roughness between 4.5 μm and 7 μm.

### Claim 7 (depends on 1)

The insert according to claim 1, wherein the projections are raised with respect to the base surface by a height between 0.5 mm and 0.7 mm.

### Claim 8 (depends on 1)

The insert according to claim 1, wherein the projections have circular cross section.

### Claim 9 (depends on 1)

The insert according to claim 1, wherein the projections have a base which has a diameter between 0.40 μm and 0.49 mm.

### Claim 10 (depends on 1)

A mould for vulcanising tyres for vehicle wheels, comprising:
at least one sidewall plate on which a moulding surface is defined and contacts an external surface of a sidewall of a green tyre,
a removable insert that is received in a seat formed on the moulding surface and comprises a base surface for contacting a portion of the external surface of the sidewall of the green tyre,
wherein the removable insert is the insert according to claim 1.

### Claim 11 (depends on 10)

A vulcanisation mould according to claim 10, wherein the base surface is continuous with the moulding surface.