# US 2019/0315036 A1 · Extrusion equipment comprising an improved extrusion head

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0315036 A1
- Document ID: US20190315036A1
- Status: Published application
- Kind: A1
- Application number: 16/469,890
- Filed: 2017-12-22
- Published: 2019-10-17
- Earliest claimed: 2016-12-22
- Assignees: Compagnie Generale Des Etablissements Michelin
- Applicants: Compagnie Generale Des Etablissements Michelin
- Inventors: Christophe Ougier; Arnaud Letocart
- Web page: https://patentgrep.com/patent/US20190315036A1

## CPC

- B29C 48/025: General arrangement or layout of plant
- B29C 48/07: Flat, e.g. panels
- B29C 48/12: Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
- B29C 48/16: Articles comprising two or more components, e.g. co-extruded layers
- B29C 48/21: the layers being joined at their surfaces
- B29C 48/2562: {Mounting or handling of the die}
- B29C 48/25686: {for dies}
- B29C 48/3001: {characterised by the material or their manufacturing process}
- B29C 48/304: {specially adapted for bringing together components, e.g. melts within the die}
- B29C 48/49: using two or more extruders to feed one die or nozzle
- B29K 2021/003: {Thermoplastic elastomers}
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

## Abstract

An installation for producing a profiled band based on several mixtures of elastomers of a different composition by means of coextrusion. The installation includes at least two extruders for supplying a mixture of elastomers to an extrusion head. The extrusion head comprises an assembly of at least two plates which are arranged side by side. Each plate having at least one cavity which enables the mixture from an extruder to be chaneled towards an outlet hole. The plates are arranged substantially transversely relative to the output direction of the mixture flows of the extruders in order to produce a discharge at approximately 90° of the mixture flow at the outlet of the screw of each extruder.

## Claims

### Claim 1

An installation for producing a profiled band based on several mixtures of elastomers of a different composition by means of coextrusion, comprising at least two extruders for supplying a mixture of elastomers to an extrusion head, the extrusion head comprising an assembly of at least two plates which are arranged side by side, each plate comprising at least one cavity which enables the mixture from an extruder to be channelled towards an outlet hole, wherein the plates are arranged substantially transversely relative to the output direction of the mixture flows of the extruders.

### Claim 2 (depends on 1)

The installation according to claim 1, wherein the outlet hole of an extruder communicates directly without changing either direction or outlet cross-section with the inlet hole in the cavity of a plate.

### Claim 3 (depends on 1)

The installation according to claim 1, wherein the plates are planar and mutually parallel.

### Claim 4 (depends on 1)

The installation according to claim 1, wherein the cavities form transfer channels which extend in a direction parallel with the planes of the plates and wherein the transfer channels extend in a direction perpendicular to the longitudinal axes of the extruders.

### Claim 5 (depends on 1)

The installation according to claim 1, wherein at least one plate comprises a through-hole which enables the outlet hole of an extruder to be connected to the cavity of an adjacent plate.

### Claim 6 (depends on 1)

The installation according to claim 1, wherein the plates are removable and are held together on a common support.

### Claim 7 (depends on 6)

The installation according to claim 6, wherein the support and the plates form an interchangeable extrusion head which is connected directly to the outlet holes of the extruders.

### Claim 8 (depends on 7)

The installation according to claim 7, wherein the extrusion head can be moved in translation between a position introduced into a support of the installation and a position removed therefrom.

### Claim 9 (depends on 7)

The installation according to claim 7, further including a means for rapidly fixing the extrusion head to the support.

### Claim 10 (depends on 1)

The installation according to claim 1, wherein the extruders are arranged at one side and the other of the extrusion head.

### Claim 11 (depends on 1)

The installation according to claim 1, further including four extruders which are arranged in pairs at one side and the other of the extrusion head and four removable plates which are each provided with at least one transfer channel for the mixture from one of the extruders towards an extrusion die.

### Claim 12

A method of producing a profiled band based on a plurality of mixtures of elastomers of different composition by means of coextrusion using at least two extruders which supply a mixture of elastomer to an extrusion head, the method comprising the steps of:
selecting a set of at least two plates which are arranged side by side, each plate comprising at least one cavity which enables the mixture from a dedicated extruder to be channelled towards an outlet hole and the plates are arranged substantially transversely relative to the output direction of the mixture flow of the extruders within the extrusion head; and
extruding the band of profiled product.

### Claim 13 (depends on 12)

The method according to claim 12, wherein the plates are arranged relative to the extruders so that the outlet hole of an extruder communicates without changing direction with the inlet hole in the cavity of a plate.

### Claim 14 (depends on 12)

The method according to claim 12, wherein at least one plate comprises a through-hole which enables the outlet hole of an extruder to be connected to the cavity of an adjacent plate.

### Claim 15 (depends on 12)

The method according to claim 12, wherein the extrusion head is a first extrusion head and further including the steps of removing the first extrusion head from the installation and replacing the first extrusion head with another extrusion head which comprises a set of plates different from the first extrusion head.