Process and apparatus for building tyres for vehicle wheels
US-2020368983-A1 · Nov 26, 2020 · US
Composite tread with targeted stiffness gradient and method of making
US2022242077A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022242077-A1 |
| Application number | US-202217660005-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 20, 2022 |
| Priority date | Dec 19, 2018 |
| Publication date | Aug 4, 2022 |
| Grant date | — |
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- Title
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Abstract
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A method for forming a composite tread, the method comprising the steps of: forming a coextruded strip of a first compound and a second compound, wherein the first compound is a tread compound, and the second compound is formed from a second compound, wherein the tread is formed from winding the coextruded strip onto the tire building drum while varying the ratio of the first compound to the second compound
First claim
Opening claim text (preview).
What is claimed is: 1 . A method for forming a composite tread, the method comprising the steps of: forming a coextruded strip of a first compound and a second compound, wherein the first compound is a tread compound, and the second compound is formed from a second compound, wherein the tread is formed from winding the coextruded strip onto the tire building drum while varying the ratio of the first compound to the second compound. 2 . The method of claim 1 wherein the lateral edges of the tread are 90-100% of the first compound. 3 . The method of claim 1 further comprising the steps of forming a rib while continuously varying the ratio of the first compound to the second compound. 4 . The method of claim 1 wherein the lateral edges of the tread and the tread blocks are formed from 90-100% of the first compound, and 0-10% of the second compound. 5 . The method of claim 1 wherein the second compound comprises a rubber composition having a shear storage modulus G′ measured at 1% strain and 100° C. according to ASTM D5289 ranging from 23 to 31 MPa. 6 . The method of claim 1 wherein the second compound comprises a rubber composition having a shear storage modulus G′ measured at 1% strain and 100° C. according to ASTM D5289 ranging from 23 to 50 MPa. 7 . The method of claim 1 wherein the second compound comprises a rubber composition having a shear storage modulus G′ measured at 1% strain and 100° C. according to ASTM D5289 ranging from 40 to 60 MPa. 8 . The method of claim 1 wherein the ratio of the first compound to the second compound is varied by changing the ratio of the speed of the first gear pump to the second gear pump. 9 . The method of claim 1 wherein the strip is formed in a continuous manner. 10 . The method of claim 1 wherein the strip is applied in a continuous manner to a tire building machine to build a tire component. 11 . The method of claim 1 wherein the tread has one or more grooves, wherein the walls of the grooves are formed from a layer of 100% of the second compound.
Assignees
Inventors
Classifications
- B29D30/1621Primary
by feeding a continuous band and winding it spirally, i.e. the band is fed without relative movement along the core axis, to form an annular element (winding and joining, spirally in general B29C53/562) · CPC title
Gear pumps · CPC title
for dies · CPC title
having reciprocating, oscillating or rotating parts · CPC title
Treads · CPC title
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Frequently asked questions
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- What does patent US2022242077A1 cover?
- A method for forming a composite tread, the method comprising the steps of: forming a coextruded strip of a first compound and a second compound, wherein the first compound is a tread compound, and the second compound is formed from a second compound, wherein the tread is formed from winding the coextruded strip onto the tire building drum while varying the ratio of the first compound to the se…
- Who is the assignee on this patent?
- Goodyear Tire & Rubber
- What technology area does this patent fall under?
- Primary CPC classification B29D30/1621. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Aug 04 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).