Method and apparatus for forming tire components using a coextruded strip
US-2019152116-A1 · May 23, 2019 · US
Installation and method for coextrusion
US12304112B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12304112-B2 |
| Application number | US-201816622715-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 21, 2018 |
| Priority date | Jun 22, 2017 |
| Publication date | May 20, 2025 |
| Grant date | May 20, 2025 |
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- Title
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Abstract
Official abstract text for this publication.
The installation is for producing a coextruded profiled element for tires that is made from rubber compounds of different compositions. The installation includes at least one first extruder having a screw with a longitudinal axis and at least one second extruder having a screw with a different longitudinal axis. An extrusion head is connected to each of the extruders by appropriate ducts. The feed inlet of each extruder is connected to the delivery orifice of a gear pump.
First claim
Opening claim text (preview).
What is claimed is: 1. A coextrusion installation for producing a coextruded profiled element for tires that is made from rubber compounds of different compositions, having at least one first extruder having a screw with a longitudinal axis, and at least one second extruder having a screw with a longitudinal axis, and an extrusion head connected to each of said extruders by appropriate ducts, wherein the feed inlet of each extruder is connected to the delivery orifice of a gear pump so that the gear pumps are positioned upstream of the extruders and each combination of one of the gear pumps and the corresponding screw connected to the extrusion head forms a positive-displacement extruder, and wherein for each positive-displacement extruder, the gear pump meters a flow rate of the corresponding rubber compound that the screw transfers from the gear pump towards the extrusion head in such a manner that the positive displacement extrusion obtained at the outlet of the positive-displacement extruder is determined and controlled by the gear pump. 2. The installation according to claim 1 , wherein the axes of the extruders make an acute angle between one another. 3. The installation according to claim 1 wherein said gear pump comprises two pinions, the axes of rotation of which are parallel to the longitudinal axis of the extruder that it feeds. 4. The installation according to claim 3 , wherein said pinions are herringbone pinions. 5. The installation according to claim 1 , wherein the gear pump has a body provided with an inlet orifice for an elastomer compound and with a delivery orifice for the compound. 6. The installation according to claim 5 , wherein the inlet orifice of the gear pump is fed with an elastomer compound strip. 7. The installation according to claim 5 , wherein the inlet orifice of the gear pump is connected directly to the outlet orifice of a feed extruder for feeding an elastomer compound. 8. A coextrusion method for producing a coextruded profiled element for tires that is made from rubber compounds of different compositions, having at least one first extruder having a screw with a longitudinal axis, and at least one second extruder having a screw with a longitudinal axis, and an extrusion head connected to each of said extruders by appropriate ducts, wherein each extruder is fed with an elastomer compound coming from a gear pump so that the gear pumps are positioned upstream of the extruders and each combination of one of the gear pumps and the corresponding screw connected to the extrusion head forms a positive-displacement extruder, and wherein for each positive-displacement extruder, the gear pump meters a flow rate of the corresponding rubber compound that the screw transfers from the gear pump towards the extrusion head in such a manner that the positive displacement extrusion obtained at the outlet of the positive-displacement extruder is determined and controlled by the gear pump.
Assignees
Inventors
Classifications
Gear pumps · CPC title
in thread form or in strip form, e.g. rubber strips · CPC title
Raw material dosing · CPC title
Articles comprising two or more components, e.g. co-extruded layers · CPC title
Treads · CPC title
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Frequently asked questions
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- What does patent US12304112B2 cover?
- The installation is for producing a coextruded profiled element for tires that is made from rubber compounds of different compositions. The installation includes at least one first extruder having a screw with a longitudinal axis and at least one second extruder having a screw with a different longitudinal axis. An extrusion head is connected to each of the extruders by appropriate ducts. The f…
- Who is the assignee on this patent?
- Michelin & Cie
- What technology area does this patent fall under?
- Primary CPC classification B29B7/7495. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 20 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).